JPH0452611Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a vehicle air conditioner that allows occupants to experience harmonized wind more comfortably.

Prior Art As a conventional air conditioner for automobiles, the structure shown in Fig. 6 has been proposed (Japanese Unexamined Patent Application Publication No. 1983-1999).
No. 15008). In other words, in front of the front seats 1 and 2,
An instrument panel 3 is provided, and air outlet ports 4 and 5 of an air conditioner are provided on both sides of the instrument panel 3, respectively. The airflow outlets 4 and 5 are provided with louver-type airflow deflection devices 8 and 9 having a plurality of deflection plates 6...7, and the airflow deflection devices 8 and 9 control the air exiting from the airflow ports 4 and 5, respectively. a first setting position where the air is blown out toward the occupants seated in seats 1 and 2 as shown by solid lines;
As shown by the broken line, it is configured to be deflectable between a second setting position where the air is blown in a direction away from the occupant. In addition, the airflow deflection devices 8 and 9 include
Operating levers 10 and 11 are provided, respectively, and the operating levers 10 and 11 are connected to connecting rods 12a and 12a, respectively.
12b to the drive lever 14 of the drive device 13. The operation of the drive device 13 is controlled based on a control signal outputted by a control device 15, and the control device 15 receives a signal inputted to a room temperature setting device 16 provided on the instrument panel 3. Set temperature and room temperature sensor 17
The control signal is output in accordance with the difference between the temperature detected by the temperature inside the vehicle and the temperature inside the vehicle. In this configuration, the control device 15 reads the room temperature set value input 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 both temperatures with a predetermined value, and determines the temperature. If the difference is larger than the predetermined value, the drive device 13 drives the drive lever 14 to the position shown by the solid line. As a result, the airflow deflection devices 8 and 9 are respectively deflected to the first setting position, and the conditioned air supplied by the air outlets 4 and 5 is concentrated and blown toward the occupants seated on the seats 1 and 2. becomes. Therefore, when cooling down after parking in the hot sun, the occupants can quickly feel cooled by the cold air blown directly onto them. Further, if the temperature difference is smaller than a predetermined value, the drive device 13
drives the drive lever 14 to the position indicated by the broken line,
As a result, the airflow deflection devices 8, 9 are each deflected to the second set position. Therefore, the conditioned air supplied from the air outlets 4 and 5 deviates from the occupants seated on the seats 1 and 2 and spreads over the entire interior of the vehicle, making it possible to obtain a diffused air flow suitable for steady cooling. be.

Problems to be Solved by the Invention However, such conventional devices simply determine whether the temperature difference between the set temperature and the vehicle interior temperature is larger or smaller than a predetermined value, and Depending on the determination result, the diffused blowout is switched to concentrated blowout. Therefore, after switching to diffuse air blowing, occupants are relieved of the discomfort of cold air being blown directly onto their skin, but because the diffuse air continues for a long time, changes in the thermal environment thereafter are small. becomes. As a result, front seat occupants' sense of the thermal environment becomes dull and they are unable to experience wind speed, which actually impairs comfort.

Means for Solving the Problems The present invention has been made in view of the above-mentioned conventional problems, and includes an airflow deflection device disposed at the harmonized air outlet provided in the instrument panel of an automobile. In an air conditioner that controls the airflow deflection device to execute a concentrated blow mode in which the harmonized air is concentrated in a predetermined direction and a diffuse blow mode in which the harmonized air is diffused over a wide area, the concentrated blow mode and the diffuse blow mode At the same time, the switching time from the concentrated blowing mode to the diffuse blowing mode and the switching time from the diffuse blowing mode to the concentrated blowing mode are randomly set to different values.

Effect: In the above structure, the intensive blow mode and the diffuse blow mode are repeatedly controlled, so that the diffuse blow mode, which dulls the occupant's sense of the thermal environment, does not continue, and the occupant can use the concentrated blow mode as appropriate. This provides a sense of wind speed and prevents a decrease in comfort due to a dulling of the senses. Moreover, since the switching time from one mode to the other is set to different values at random, there is no dulling of the senses due to repeated switching, and while stimulating the occupant's pleasure in the thermal environment, it is possible to actively can improve comfort.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. That is, as shown in FIG. 1, the air conditioner main body 20 is constructed by connecting a blower unit 21, a cooling unit 22, and a heater unit 23. The blower unit 21 is provided with an intake door 26 that opens and closes an outside air inlet 24 and an inner inlet 25, and a blower fan 28 whose driving source is a blower fan motor 27. 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, and a heater core 31 is connected to an air mix door actuator 32 in front of the heater core 31. Air mix door 33
is installed at the center. Furthermore, a ventilator outlet 34, a defroster outlet 35, and a foot outlet 36 are formed in the heater unit 23. At the base end of each outlet 34, 35, 36, there is a vent door.
Vent door 38 linked to actuator 37
A defroster/foot switching door 40 linked to the defroster/foot switching door actuator 39 is pivotally supported. A plurality of ventilator outlets 34 are formed in the instrument panel 3 disposed in front of the front seats 1 and 2, and inside the ventilator outlet 34 is a louver having a plurality of deflection plates 6...7... airflow deflection device 8,
9 is provided. The airflow deflection devices 8, 9 are
For example, similar to the structure shown in FIG. 6, it has actuating levers 10, 11, which are connected to a driving lever 14 of a drive device 13 via connecting rods 12a, 12b, respectively. Become.

On the other hand, the input section of the controller 41 receives detection signals from an outside temperature sensor 42, a temperature sensor 43, a room temperature setting device 44, and a solar radiation sensor 45, and from the output section of the controller 41,
Each of the actuators 29, 32, 37, 39,
Blower fan motor 27 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 FIGS. 2A and 2B. In other words, when the air conditioner switch (not shown) is turned on, the controller 41 as well as the air conditioner main body 20
is started, and the initial settings of constants and flags used in this control flowchart are performed (step 1).
01). Specifically, constants A to E used in the calculation formula for the target outlet temperature Tof, constants F, G, and H used in the calculation formula for the opening degree X of the air mix door 33, and a flag for determining whether the room temperature is within the comfort range. A flag for controlling whether or not to set a time and a transition time when changing the blowing mode are set.

Next, in step 102, each sensor 42, 4
3, 45 and the room temperature setting device 44, the outside temperature Ta,
The room temperature Tic, the room temperature set value Test, and the amount of solar radiation S are read.

In step 103, the room temperature Tic and the room temperature set value Tset are set.
The applied voltage setting value Vfan of the blower motor 27 is determined according to the difference between Tic and Tic-Tset, and the applied voltage setting value Vfan is set to a larger value so as to bring the room temperature closer to the room temperature setting value as soon as the value of Tic-Tset is larger. Set.

In step 104, the target outlet temperature Tof is set to Tof
= A・Ta+B・Tic+C・Tset+D・S+E, and using this Tof, X=F・Tof ² +
The air mix door opening degree X is calculated as G・Tof+H (step 105), and the target outlet temperature is
Heaters shown below according to Tof, bi-level,
Each blowout mode of the vent is selected.

Heater mode: Open the foot outlet 36 and the defroster outlet 35.

Bi-level mode: The ventilator outlet 34 and foot outlet 36 are opened.

Vent mode: Only the ventilator outlet 34 is opened.

That is, if the target blowing temperature is high, the heater mode is selected, if the target blowing temperature is medium, the bilevel mode is selected, and if the target blowing temperature is low, the vent mode is selected.

Next, in step 107, it is determined whether or not the blowing mode selected in the previous step is the vent mode. If this determination is NO, the blower fan applied voltage setting value calculated in the previous step is determined.
Vfan is applied to the blower motor 27 (step 127), and the corresponding actuator 3 is applied to open the air outlet according to the heater and bi-level mode.
A control signal is output to 7 and 39 (step 12).
8). On the other hand, if the determination at step 107 is YES, it is determined whether the room temperature is within the comfortable range (step 108), and the result of this determination is set as a flag. That is, FLAG S=1 is determined to be a comfortable area and the process proceeds to the next step 109, and if FLAG S=0, the process proceeds to step 110 as an uncomfortable area.

In step 109, the room temperature Tic and constant temperature set value Tset
If Tic-Tset<3°C, it is determined that the temperature is within the comfortable range, and the process proceeds to step 113. on the other hand
If Tic-Tset≧3°C, it is determined that the temperature is in the uncomfortable range, and the process proceeds to step 125.

Step 110 is to determine the current comfortable/uncomfortable state when the flag is determined to be in the uncomfortable range, and if Tic-Tset<2°C, it is determined to be in the comfortable range, and the next step is started. Proceed to step 111; on the other hand, if this determination is NO, proceed to step 112
Proceed to. Then, in step 111, the room temperature determination flag is set to a comfortable state, that is, FLAG S=
1 and proceeds to step 113, while in step 112 the room temperature determination flag is set to an uncomfortable state.

In step 113, it is determined whether the diffuse blow mode time or concentrated blow mode time has already been set, and if FLAG t=1, it is determined that they have been set and the process proceeds to step 116. On the other hand, FLAG t
= 0, the time is set in the next step 114 since it has not been set, and since the time is set in the next step 115 in step 114, the flag indicating that it has been set in advance, that is, FLAG t
Set =1.

Next, in step 115, the time for maintaining each blowout mode is set. Specifically, the maintenance time for the diffused blowout mode is determined by a function that generates a random number between 0 and 1.
Multiply RAND0M by 60 and add 15 to the maintenance time in seconds. Similarly, for the maintenance time of the concentrated blow mode, the function RANDOM is multiplied by 10 and 5 is added to the resultant number to obtain the maintenance time in seconds. With these operations, the maintenance time of diffuse blowing mode is 15
The value will be a random value between seconds and 75 seconds, while the concentrated blow mode will be a random value between 5 seconds and 15 seconds. Therefore, the switching time from the concentrated blowing mode to the diffuse blowing mode and the switching time from the diffuse blowing mode to the concentrated blowing mode inevitably take randomly different values.

Then, in step 116, the time Δt required for one loop is added in order to count the time for one loop and advance the time.

Furthermore, in step 117, first, the blowout mode time t and the diffusion maintenance time td set in step 115 are determined.
If the maintenance time td of the diffusion blowing mode has not been reached, the process advances to step 118 and the mode is set to the diffusion blowing mode. Therefore, the airflow deflection device 9 uses the output from the controller 41 in step 128 to operate the deflection plate so that the harmonized air is diffused approximately evenly over the front seats 1 and 2 as shown by the dotted line in FIG. Drive 7.

In step 119, the blowing mode time t and the time obtained by adding the diffusion blowing mode maintenance td and the transition time tw ₁ from the diffuse blowing mode to the concentrated blowing mode, that is, t and td+tw ₁ are compared. and t is td+
If tw ₁ has not been reached, the process of step 120 is executed. The processing contents of this step 120 are as follows.
As shown in Figure 4, it takes tw ₁ hour to transition from the diffuse blow mode to the concentrated blow mode, and by executing this process, the air blowing noise when changing from the diffuse blow mode to the concentrated blow mode can be reduced. The increase will be slow. Therefore, when changing from the diffuse blow mode to the concentrated blow mode, the occupant is kept in a state of being insensitive to an increase in air blow noise, and a decrease in comfort caused by a sudden increase in noise is prevented.

On the other hand, if the determination in step 119 is NO, the process proceeds to step 121 and further adds concentrated blowing mode time tc to td+tw ₁ , and adds this and blowing mode time t.
Compare with. If t has not reached td+tw ₁ +tc, then in step 122 the concentrated blowing mode is set. Then, the airflow deflection device 9 performs step 12.
The deflection plate 7 is driven by the output from the controller 41 at step 8 so that the harmonized air is concentrated on both sides of the center of the front seats 1 and 2, as shown by the solid line in FIG. Therefore, the occupants seated in the front seats 1 and 2, who are receiving less irritating air blowing in the diffused blowing mode, are given a sense of the wind speed and are prevented from becoming less sensitive to the thermal environment. Furthermore, the sweat generated on the surface of the occupant's body during the diffused blowout mode is evaporated by the high-velocity harmonized wind during the concentrated blowout mode, and the heat of evaporation is taken away from the occupant, making it possible for the occupant to feel pleasure. .

On the other hand, if the determination at step 121 is NO,
The process advances to step 123, where the time tw ₂ for transitioning from the concentrated blow mode to the diffuse blow mode is added to the above-mentioned addition time td+tw ₁ +tc, and this is compared with the blow mode time t. And if t has not reached the value of td + tw ₁ + tc,
Proceeding to step 124, as shown in FIG. 5, the concentrated blowing mode is shifted to the diffused blowing mode over tw ₂ hours. Here the fourth
As can be seen from the comparison between the figure and FIG. 5, the transition time tw ₁ from the diffused blowing mode to the concentrated blowing mode is:
Transition time from concentrated blow mode to diffuse blow mode
This is set to be longer than tw ₂ in order to avoid a sudden increase in air blowing noise as described above. According to experiments conducted by the present inventors, 5 to 15 seconds is appropriate for tw _1. On the other hand, when transitioning from concentrated blowing mode to diffused blowing mode, there is no increase in air blowing noise, so it should be kept as short as possible. It turned out to be a good experience. However, the deflection plate 7 of the airflow deflection device 9
It is physically impossible to switch instantaneously, and if a solenoid valve is used as the driving source, approximately
0.5 seconds, or 5 seconds if a motor is used as the drive source. Therefore, tw ₂ is set as small as possible depending on the driving source of the deflection plate 7, and tw ₁
It is necessary to set it to a longer time than this.

If the determination in step 123 is NO, then in step 125 the blowout mode time t is reset to 0, and in step 126 the time setting presence/absence flag is set to 0, and FLAG t=0.
Make it. In the next step 127, the blower fan applied voltage set value Vfan is applied to the blower motor 27 as described above, and in step 128, the drive device 13 of the airflow deflection device 9 and each actuator 29, 3 are applied.
Control signals are outputted from the controller 14 to nodes 2, 37, and 39, and thereafter steps 102 to 128 are repeated. In addition, in step 115, the random number generation function RANDOM used to set the maintenance time of the diffused blowing mode and concentrated blowing mode is as follows.
If the maintenance times of both blowout modes are set at the same time, there is no problem even if the same random number is used because the values to be multiplied are different. However, in order to set the switching time from the concentrated blowing mode to the diffuse blowing mode and the switching time from the diffuse blowing mode to the concentrated blowing mode to more randomly different values, each random number generation function RANDOM must be different. It is preferable that there be.

Effects of the invention As explained above, the present invention repeatedly controls switching between the concentrated blowout mode and the diffused blowout mode, so that only the diffused blowout mode, which dulls the occupant's sense of the thermal environment, continues. There isn't. Therefore, the occupants are given a sense of wind speed through the concentrated blowing mode, which is repeated as appropriate, and a reduction in comfort due to dulling of the senses is prevented. Furthermore, the sweat generated on the surface of the occupant's body during the diffuse blow mode is evaporated by the high-speed wind during the concentrated blow mode, and the heat of evaporation is taken away from the occupant, improving the occupant's sense of pleasure and bringing the room temperature to a comfortable level. You can actively improve comfort even afterwards. In addition, since the switching time from concentrated blowing mode to diffuse blowing mode and the switching time from diffused mode to concentrated blowing mode are set to different values at random, there is no dulling of the sense of repeated switching, and the heat Comfort can be actively improved while constantly stimulating a sense of pleasure in the environment.

In addition, in the embodiment, the transition time from the diffused blowing mode to the concentrated blowing mode is set longer than the time to transition from the concentrated blowing mode to the diffused blowing mode. Therefore, it is possible to suppress the auditory stimulation of the occupants due to the increase in air blowing noise when changing from the diffuse blowing mode to the concentrated blowing mode, and it is also possible to prevent a decrease in the sense of comfort caused by the increase in the blowing noise. be.

[Brief explanation of the drawing]

Figure 1 is a conceptual diagram showing one embodiment of the present invention;
Figures A and B are flowcharts showing the operation of the same embodiment, Figure 3 is an explanatory diagram showing the air blowing conditions in the concentrated blowing mode and the diffused blowing mode, and Figure 4 is a transition characteristic diagram from the diffused blowing mode to the concentrated blowing mode. FIG. 5 is a characteristic diagram of transition from concentrated blowing mode to diffused blowing mode, and FIG. 6 is a conceptual diagram of a conventional automobile air conditioner. 3... Instrument panel, 8... Airflow deflection device, 20... Air conditioner body, 34... Ventilator outlet, 41... Controller.

Claims (1)

[Scope of utility model registration request] An airflow deflection device is arranged at a harmonized air outlet provided in an instrument panel of an automobile, and the airflow deflection device is controlled to concentrate the harmonized air in a predetermined direction. In an air conditioner that executes a diffused blowing mode that diffuses the air over a wide area, the concentrated blowing mode and the diffused blowing mode are repeatedly switched and controlled, and the switching time from the concentrated blowing mode to the diffused blowing mode and the change from the diffused blowing mode to An air conditioner for an automobile, characterized in that the switching time to the concentrated blow mode is randomly set to different values.