JPH0532123A - Automotive air conditioner - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent warm air from staying on the head and improve air conditioning comfort. [Structure] A mode switching unit 36 having an upper air outlet 25 for selecting a blowing mode, an up-down wind direction switching unit 38 for selecting a blowing direction, and an air distribution duct 3 connecting these two switching units.
9, the upper outlet device 34 and the lower outlet 27
The instrument panel 33 is provided with a plurality of air outlet devices 5 including a lower air outlet device 40 including a mode switching portion 42, a vertical airflow direction switching portion 44, and an air distribution duct 45. Further, the controller 46 is provided with an outlet mode determining unit, an outlet direction determining unit, and an outlet mode determining unit. Then, the air outlet, the air outlet direction, and the air outlet mode are controlled according to the thermal environment of the vehicle compartment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner for making the environment inside a vehicle comfortable.

[0002]

2. Description of the Related Art As a conventional automobile air conditioner, for example, an air conditioning air outlet is provided at a lower portion of an instrument panel of a vehicle at a knee height of an occupant to blow out the air conditioning air. No. 61-139808, JP-A-6-6
There are those disclosed in JP-A-2-23813 and JP-A-63-59718. Further, for an automobile in which an air outlet is provided under the instrument panel of the vehicle at a height approximately at the knees of the occupant, and the direction of the air blown out from the air outlet is largely changed in the vertical direction of the vehicle compartment during cooling and heating. An air conditioner is disclosed in Japanese Patent Application Laid-Open No. 52-154851. In addition, the air outlets located above and below the instrument panel are controlled according to the heat load in the passenger compartment.
There is one disclosed in Japanese Patent Laid-Open No. 3-132239, and an automobile air conditioner having a horizontally long air outlet having a larger aspect ratio is disclosed in, for example, Japanese Patent Laid-Open No. 59-171710.

[0003]

However, in such a conventional vehicle air conditioner as described above, in any of the air conditioners, the height of the knee portion of the occupant is almost below the instrument panel of the vehicle. In the case of an automobile air conditioner that blows out air-conditioning air by providing an air outlet located at, the warm air from the knee air outlet easily blows up to the upper body of the occupant, and when used for a long time, the bulkiness of the occupant's face and head There was a problem that a mist was likely to occur.

FIG. 7 shows the temperature distribution of the air flow when the blowing air velocity is 2 m / s and the temperature difference between the room temperature and the blowing air velocity is 40 ° C. (room temperature: 20 ° C., blowing air temperature: 60 ° C.) using an infrared thermometer. The result of the measurement is shown.

As can be seen from the measurement results, the blowing air rises due to buoyancy, which causes a feeling of bulkiness on the occupant's face and a feeling of haze even if it stays on the occupant's head. Further, when the occupant is a woman, depending on the clothing, there is a problem that the clothing is rolled up when a high flow velocity is blown to the knee.

Further, in the case of heater blowing, if hot air is fixed and blown at the feet, only a part of the feet is heated to cause discomfort, and there is a problem that the area above the feet is not warmed.

Further, in an automobile air conditioner which changes the blowing direction to the up and down direction of the vehicle compartment during cooling and heating,
Since the blowing direction is simply changed, only the foot is locally heated during heating, and there is a problem that the upper part of the foot cannot be properly heated from the knee joint.

The present invention has been made by paying attention to such a conventional problem, and it is a feeling of haze due to the air-conditioning wind of the occupant, or a feeling of bulkiness of the face, raising of clothes when the occupant is a woman, and It is an object of the present invention to provide an air conditioning system for an automobile, which solves the problems such as blowing out on the face that gives an occupant an uncomfortable feeling, and improves the occupant's comfort.

[0009]

Therefore, the present invention is based on FIG.
As shown in FIG. 1, a mode switching unit 1 for switching the air-conditioning air blowing mode, a vertical airflow direction switching unit 2 capable of swinging the air-conditioning air blowing direction in the vertical direction in the vehicle interior, and these two switching units 1 and 2. Blow-out device 4 consisting of a wind distribution duct part 3 for connection
A plurality of blowing devices 5 are arranged on the instrument panel so as to be relatively positioned above and below each other. Further, a blowout mode determining means 6 for determining a blowout mode and controlling the mode switching unit 1, a blowout direction determining means 7 for determining a blowout direction and controlling the up / down wind direction switching unit 2, and a blowout device 4 for blowing out conditioned air. A blower outlet mode determining means 8 for selecting and blowing out the conditioned air, and a sensor group 9 including various sensors for detecting the thermal environment of the passenger compartment in the embodiment are provided.

Further, in the embodiment, the outlet mode determining unit 8 selects the outlet units other than the lowermost unit 4 and the outlet mode determining unit 6 selects the diffusion mode so that the conditioned air is blown toward the chest. Thus, the conditioned air blown from the blowout device located at the bottom is prevented from rising to the upper part of the passenger compartment.

Further, in the case of a blowing device in which three or more blowing devices 4 are installed vertically, air-conditioning air is blown toward the chest from the blowing device located in the middle to increase the pressure on the face.
The conditioned air blown toward the face from the air outlet device located at the top is prevented from directly hitting the face.

First, the blowing direction determining means 7
The blowout direction is directed overhead, and the blowout mode determining means 6 selects the concentrated mode to blow out the conditioned air and blow the warm air above the head. Next, the blowing direction determining means 7 determines that the conditioned air should be swung between the overhead and the neck or the chest, and the avoidance mode is selected by the blowing mode determining means 6 to oscillate the conditioned air but does not hit the face. To do so.

Further, the blowout mode determining means 8 selects the lowest blowout device 4, the blowout direction determining means 7 makes the blowout direction upward from the horizontal, and the blowout mode determining means 8
The blowout device 4 located at the top is selected, and the blowout mode determining means 6 diffuses the blowout mode, and the blowout direction determining means 7 blows out the blowout direction with the chest as the chest, and the blowout device 4 at the bottom is blown by the air curtain effect. Suppress the rise of the air conditioning wind. Further, when the conditioned air from the lowermost air outlet device 4 is directed downward from the horizontal by the blowing direction determining means 7, first, the blowing direction determining means 7 selects overhead and the blowing mode determining means 8 selects the concentrated mode. And blow a concentrated wind above your head. Next, the blowing direction determining means 7 selects the swing and the blowing mode determining means 6 selects the avoidance mode so that the conditioned air is swung up and down and does not hit the face.

[0014]

When the conditioned air is blown in the diffusion mode from the outlets of the air outlet device excluding the lowermost part toward the chest, the conditioned air from the lowermost air outlet device is prevented from rising due to the air curtain effect of the conditioned air. .

Further, in the embodiment, when the conditioned air is blown upward from the uppermost air outlet device in the concentrated mode, the warm air that stagnates overhead is blown away, so that the occupant's sense of ambience is eliminated. It

When swinging the blowing direction and selecting the avoidance mode, the conditioned air is widely spread on the occupant and does not hit the face, so that the discomfort of hitting the face with the conditioned air is eliminated.

When air conditioning air is blown to the chest from the middle air outlet located in the middle in a diffusion mode, the pressure on the face rises. Therefore, the air conditioning air blown toward the face from the upper air outlet directly hits the face. Absent.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 2 to 5 are diagrams showing the configuration of the first embodiment of the present invention.

First, the configuration will be described. FIG. 2 shows the overall configuration. The air conditioner body 11 is configured by connecting a blower unit 12, a cooling unit 13, and a heater unit 14. The blower unit 12 has an intake door 1 for opening and closing an outside air intake port 15 and an inside air intake port 16.
7 and a blower fan 19 serving as a blower using a blower fan motor 18 as a drive source are provided, and an intake door actuator 20 is linked to the intake door 17. An evaporator 21 is provided in the cooling unit 13, and the heater unit 1 is also provided.
A heater core 22 which uses engine cooling water as a heat source is installed in the inside of the engine 4, and an air mix door 24 linked to an air mix door actuator 23 is pivotally installed on the front surface of the heater core 22. Further heater unit 1
An upper air outlet 25 corresponding to a conventional ventilator outlet, a defroster air outlet 26, and a lower air outlet 27 corresponding to a conventional foot air outlet are formed at 4.
An upper door 29 linked to an upper door actuator 28 and a defroster / lower switching door 31 linked to a defroster / lower switching door actuator 30 are pivotally supported at the base end portions of 5, 26, and 27.

The upper air outlet 25 is an instrument panel 33 arranged in front of an occupant (not shown) seated in the front seat 32 (in the drawing, all instruments and the like are omitted for clarity of explanation). A plurality of slits are formed in the upper part of the vehicle in the width direction of the vehicle. The lower outlet 27
Are formed in the lower part of the instrument panel 33 in the shape of a plurality of slits.

The upper outlet device 34, which is the upper outlet device 4 having the upper outlet 25, has a mode switching unit 36 driven by an actuator 35, a vertical wind direction switching unit 38 driven by an actuator 37, and Both switching unit 3
It is composed of a ventilation duct section 39 connecting the six and 38.
Similarly, the lower blower outlet device 40, which is the blower outlet device 4 located at the lower portion having the lower blower outlet 27, is the actuator 4
Mode switching unit 42 driven by 1 and actuator 43
Up-down wind direction switching unit 44 and both switching units 42,
The air distribution duct portion 45 connects the 44.

The upper blow-out device 34 and the lower blow-out device 40 are provided so that their relative positions are above and below to constitute the blowing device 5, and a plurality of blowing devices 5 are provided on the instrument panel 33. There is.

Further, the air conditioner main body 11 is provided with an outside air introducing duct 71 as a non-air-conditioning air introducing means, one end of which communicates with the outside air introducing port 15 and the other end of which communicates with the upper outlet 25. A non-air-conditioning air introduction door 73 linked to a door actuator 72 is pivotally supported at an end of the introduction duct 71 on the upper outlet 25 side.

On the other hand, detection signals from the outside air temperature sensor 47, the room temperature sensor 48, the room temperature setting device 49, and the solar radiation amount sensor 50 are input to the input section of the controller 46 which is a control device. Further, from the output section of the controller 46, the actuator 20 of the air conditioner main body 11,
23, 28, 30, the blower fan motor 18, and the actuators 35, 37, 41 of the air outlet devices 34, 40,
It is configured to output a control signal to 43.

FIG. 3 shows the upper outlet device 34,
(Note that the lower outlet device 40 has the same structure).
36 is a mode switching unit, 38 is a vertical wind direction switching unit, 39 is an air distribution duct unit, 51, 52 and 53 are dampers, 54 is a partition plate fixed to the inner wall of the mode switching unit 36, 55 is a guide vane, and 56 is An air-conditioning air introduction unit, 57 is a vertical wind direction switching pulley for rotating a vertical wind direction switching damper (not shown), and 58 is a damper rotation shaft.

FIG. 4 is an enlarged view of the mode switching section, and FIG. 5 is an enlarged view of the dampers 51, 52 and 53. The dampers 51, 52, 53 are attached to the damper rotation shaft 58 at different angles (90 ° in FIG. 3), and are combined in a cross shape. The damper 51 includes 51a and 51a.
b and 51c, the damper 52 and the damper 53 have different areas 52a, 52b and 53, respectively.
a and 53b. Also, the dampers 51, 5
A partition plate 54 changes the air-conditioning air flow cross-sectional areas of the rotating shaft surfaces 2, 53. Then, the actuators 35 rotate the dampers 51, 52, 53 about the damper rotating shaft 58 to switch the air-conditioning air blowing mode. In FIG. 2, an arrow 59 indicates the flow when the concentrated blowout mode is set.

Similarly, by rotating the vertical airflow direction switching pulley 57 with the actuator 43, the vertical airflow direction is controlled.

FIG. 6 shows the relationship between the blowing mode of the blowing device and the movement of the rotary damper. By opening only the damper 51 at the center and closing the dampers 52 and 53, a concentrated blowout mode in which the conditioned air is blown out concentratedly on the target occupant is set.

The dampers 51 to 53 are tilted, all the dampers 51 to 53 are in a half-opened state, and a diffusion blowout mode in which the conditioned air is blown out to a wide area in the vehicle cabin including the target occupant is set. Further, the dampers 52, 53 at the ends are opened to set the avoidance mode in which the conditioned air is blown into the vehicle interior without including the target occupant.

FIG. 7 shows that the blowing wind speed is 2 m / s as described above.
The temperature difference between the room temperature and the blowing air temperature is 40 ° C (room temperature: 20 ° C,
It shows the results of measurement of the temperature distribution of the air flow in the case of a blowing air temperature: 60 ° C. using an infrared thermometer.

As can be seen from this measurement result, the blowing air rises due to buoyancy. Therefore, in the present invention, this increase is suppressed.

Next, an example of control of the air conditioner having such a configuration will be described with reference to the flow charts shown in FIGS. 8 and 9.

In step 101, the initial values of constants used in this control flowchart are set. That is, it is a set of constants A to E used in the calculation formula of the target outlet temperature Tof and F, G, and H used in the calculation formula of the opening X of the air mix door 24.

In step 102, data is input from each sensor of the sensor group 9. That is, outside temperature Ta and room temperature T
ic, room temperature set value Tset, and solar radiation amount S.

In step 103, the applied voltage Vfan is determined by the difference between the room temperature and the room temperature set value, that is, (Tic-Tset) in order to control the air volume of the blower fan 19 by the applied voltage. Specifically, the larger the deviation is, the more the applied voltage is increased and the larger the air volume is, so that the room temperature set value is quickly approached.

At step 104, the target outlet temperature Tof is calculated from the outside air temperature, the room temperature, the room temperature set value, and the amount of solar radiation.

In step 105, the opening degree X of the air mix door 24 is determined based on this target outlet temperature.

In step 106, the blowing mode is determined based on this target blowing temperature. That is, if the target outlet temperature is high, the heater mode is set, if it is medium, the bi-level mode is set, and if it is low, the vent mode is set.

In step 107, it is determined whether or not the outlet is in the heater mode. If it is in the heater mode, the process proceeds to step 109, and if not, the process proceeds to step 108.

At step 108, it is judged whether or not the air outlet is in the bilevel mode.
Go to step 110, else step 111
Go to.

In step 109, the conditioned air is blown from the lower outlet 27 by changing the blowing mode, the blowing direction, the air volume, and the blowing temperature. The control of step 109 will be described with reference to FIG. As shown in FIG. 10 (b), the blowing direction is the foot, knee, and chest, but as shown in FIG. 10 (a), the blowing mode is diffuse when the wind direction is the foot and the chest, and the concentrated blowing is when the knee portion. . Also, step 1
As shown in FIG. 10C, the applied voltage Vfan determined in 03 is applied by lowering it by a certain determined voltage in the case of knee blowing. Further, the blowing temperature determined in step 104 is increased by a certain temperature as shown in FIG. 10 (d) when the knee is blown, and is decreased when the chest is blown.

The control described in this step will be described with reference to FIGS. 11 to 13. FIG. 11 is a diagram in which the blowout mode is a diffuse blowout and is blown toward the feet 66. This time,
The air volume, that is, the fan applied voltage is the value Vfan determined in step 103. FIG. 12 shows a state in which the blowing mode is set to concentrated blowing after a predetermined time in this state and the balloon is blown to the knee 65. At this time, the air volume, that is, the fan applied voltage is smaller than Vfan, and the target outlet temperature is T
It is set larger than of. Thereafter, as shown in FIG. 13, the blowout is directed toward the chest 64, and the blowout mode is the diffusion blowout. At this time, the air volume, that is, the fan applied voltage is Vfan, and the target blowout temperature is set lower than Tof by a predetermined value. Moreover, the blowing time to the chest is set to be shorter than the foot blowing time. After this,
The blowing direction is changed in the order of the knee and the foot, and the above control is repeated.

In this way, when the outlet mode is the heater mode, the diffused blow is blown to the feet to blow warm air over the entire foot, and the knees are blown intensively to blow warm air higher than the blow to the feet. The temperature near the occupant can have a temperature distribution in which the lower half of the body is hot. As a result, as in the conventional example, in the early stage of the heater mode, only a part of the foot is heated and the upper part of the foot is not warmed yet, and the passengers can be more comfortable. . Further, in the case of knee blowing, by correcting the voltage applied to the fan to be low, it is possible to solve problems such as the clothes being raised when the occupant is a woman.

In step 110, the conditioned air is blown from the upper outlet 25 and the lower outlet 27 by changing the blowout mode, blowout direction, air volume, and blowout temperature to have a certain correlation. The control content of step 110 will be described with reference to FIG. As shown in FIGS. 14B and 14E, in the blowing direction, the lower outlet 17 is the foot and the knee, the upper outlet 25 is overhead,
Blows across face and chest. The control of the lower blowing will be described.
When the wind direction of the lower outlet 27 is at the feet, the blowing mode is diffuse as shown in FIG. The blowing time is the same for the legs and chest, and alternates. In addition, as shown in FIG.
In the case of a knee blowout, the applied voltage Vfan determined by is lowered by a predetermined voltage and applied. Furthermore, FIG.
As shown in (f), the blowing temperature determined in step 104 is increased by a certain determined temperature when the knee is blown.

Next, the control of the upper outlet will be described. 14
As shown in (e), when the lower blowing direction is the foot,
As shown in (b), the upper air is blown overhead and from above the overhead to the chest. As shown in FIG. 14 (a), the overhead blowing mode is concentrated, and avoidance is selected for the blowing mode of the movement from the overhead to the chest. When the outlet direction is overhead, the outlet temperature from the upper outlet is set to be lower than the target outlet temperature Tvi by opening the non-air-conditioning air inlet door 73 to introduce outside air as shown in FIG. 14 (c). Where Tvi
Is the upper outlet 25 with the non-air-conditioning air introduction door 73 closed at the target outlet temperature Tof determined in step 104.
It is the blowing temperature blown out from. This upper outlet temperature Tvi
(Ventilator outlet temperature) is set lower than the air temperature from the lower outlet (foot outlet) depending on how the upper outlet 25 attached to the heater unit 14 is attached. Next, Figure 1
As shown in FIG. 4 (e), when the lower blowing direction is the knee,
As shown in FIG. 4 (b), the upper blowing direction is the chest, and FIG.
As shown in (a), diffusion blowout is set. At this time,
As shown in FIG. 14G, the fan applied voltage is set lower than Vfan as described above.

The control of step 110 described with reference to FIG. 14 will be described with reference to FIGS. FIG. 15 is a diagram in which the blowout mode of the lower outlet 27 is a diffuse blowout toward the foot 66, and the blowout mode of the upper outlet 25 is concentrated above the head 61. At this time, the air volume, that is, the fan applied voltage is the value Vfan determined in step 103 as shown in FIG. 14G, and the target outlet temperature of the lower outlet 27 is step 104 as shown in FIG. 14F. It is the value Tof determined by, and the upper outlet temperature is shown in Fig. 1.
As shown in FIG. 4 (c), it is set lower than the target outlet temperature Tvi.

By controlling in this way, hot air is blown to the entire feet, and concentrated air having a low temperature and a high flow velocity is blown from the upper outlet 25, so that high temperature air drifts near the occupant's head. It is possible to prevent the occupant's haze and the bulkiness of the face, and the temperature distribution is head cold feet.

FIG. 16 is a diagram showing the direction of the lower direction of the conditioned air blown from the lower outlet 27, the mode is the diffusion of the feet, and the upper outlet is moving in the avoidance mode near the face 62 between the head 64 and the chest 64. At this time, as shown in FIG. 14 (g), the air volume, that is, the fan applied voltage is Vfan, the lower outlet temperature is set to the target outlet temperature Tof as shown in FIG. 14 (f), and the upper outlet temperature is As shown in FIG. 14 (c), it is the set outlet temperature Tvi.

In this way, when the upper blowing direction changes from overhead to chest, the blowing mode is set to the avoidance mode as shown in FIG. 14 (a). It is very uncomfortable to blow the conditioned air directly onto the occupant's face. Therefore, by controlling in this manner, the face is prevented from being blown out and the hot air near the occupant's face is blown off by forced convection. Therefore, the haze and bulkiness of the occupant can be further suppressed, and the temperature distribution of head cold foot heat can be maintained.

FIG. 17 is a view in which the lower blowing direction, the mode is knee concentration, and the upper blowing is diffused and blown to the chest 64.
At this time, the air volume, that is, the voltage applied to the fan is shown in FIG.
As shown in Fig. 1, it is smaller than Vfan, and the lower outlet temperature is shown in Fig. 1.
As shown in FIG. 4 (f), it is set higher than the target outlet temperature Tof, and the upper outlet temperature is set to the set outlet temperature Tvi.

By controlling in this manner, the conditioned air having a temperature higher than the target outlet temperature Tof from the lower outlet 27 and lower than the target outlet temperature Tof is blown in the concentrated mode, and the clothes are blown to the knee. It solves the problem of rising. Further, at this time, by blowing out from the upper outlet 25 to the chest in the diffusion mode, it is possible to prevent the airflow from the lower outlet from soaring to the upper part of the occupant due to the function of the air curtain.

In this way, when the air outlet mode is the bilevel mode, the occupant's face feels bulky during heating,
Also, it solves problems such as throwing up clothes when the occupant is a woman. Further, by making the temperature around the occupant a temperature distribution of head cold foot type, it is possible to give the occupant a comfortable feeling.

Next, the air curtain effect and the air curtain of the conditioned air blowing device 5 including the upper blowing device and the lower blowing device 4 having the two slit-shaped outlets 25 and 27 that are relatively positioned above and below each other. The function of suppressing the conditioned air blown from the lower air outlet 27 from rising to the upper part of the occupant due to the pressure distribution effect other than the effect will be described.

18 to 21 show the traces of the main flow from the blowing device. The setting conditions are a constant flow rate from each outlet, the air temperature of the conditioned air blown from the upper outlet 25 is 39 ° C., and the air temperature of the lower outlet 27 is 53 ° C.

FIG. 18 shows a case where concentrated wind is blown from the lower outlet 27 toward the knee 65 of the occupant 60. FIG. 19 shows a case where diffused air is blown from the lower outlet 27 to the foot 66 of the occupant 60. FIG. 20 shows the lower air outlet 27 through the knee 6 of the occupant 60.
When the concentrated wind is blown toward 5, and the diffused wind is blown from the upper outlet 25 to the chest 64 of the occupant 60. FIG. 21 shows the traces of the flow when the diffused air is blown from the lower outlet 27 toward the foot 66 of the occupant 60 and the concentrated air is blown from the upper outlet 25 onto the head 61 of the occupant 60. There is.

22 to 25 are diagrams showing isobars of the pressure distribution of the front seat 32 in the blowing method corresponding to FIGS. 18 to 21, respectively. The magnitude of pressure in the figure is P ₁
> P ₂ > P ₃ > P ₄ > P ₅ .

In FIG. 18, the passenger 60 from the lower outlet 27
The conditioned air temperature blown toward the knees 65 of the vehicle easily flows along the human body 60 and above the occupant 60 due to the relationship between the jetting position of the jet and the seating position of the occupant. It becomes easy to rise to the upper part of the occupant 60.

In the case shown in FIG. 19, the conditioned air blown from the lower outlet 27 toward the foot portion 66 of the occupant 60 rises above the occupant 60 due to the buoyancy of the fluid.

In the case shown in FIG. 20, the blowing direction of the lower outlet 27 blows the concentrated wind toward the knee 65 as in the case of FIG.
The warm air blown from the lower outlet 27 is prevented from rising to the upper part of the occupant 60 by the air curtain effect by the diffused blown air blown to the chest 63 of the passenger.

FIG. 21 is a flow chart of the flow in the case of FIG. 15 described above. In this case, the warm air that stagnates above the head 61 of the occupant 60 is blown by forced convection.
In this way, the occupant 60 can change the blowing direction from the upper outlet 25.
In the case of the upper portion, the air curtain effect of the upper outlet 25 cannot be obtained. However, as shown in FIG. 25, a high-pressure region is formed in the occupant's head by the blowout flow from the upper outlet 25, and the high pressure prevents warm air from the lower outlet 27 from rising to the upper portion of the occupant 60. To be

That is, according to Bernoulli's theorem, which is a relational expression between the pressure and the wind speed, generally, when the jet impinges on the object, the pressure at that portion becomes high. Bernoulli's theorem can be expressed as follows on the same streamline.

P _a + (1/2) ρu _a ² = P _b + (1/2) ρu _b ² where P is pressure, ρ is fluid density, u is flow velocity, and subscripts a and b are on the same streamline. Represents any position of. Since the fluid is air, the potential energy was ignored.

Here, the streamline is selected from the outlet to the stagnation point where the jet blows against the object (the point where the flow velocity at that point becomes zero), and the suffix b is the outlet position and a is the object. if the stagnation point, and, from u _a = 0, the energy of the fluid with at _{P a = P b + (1/2} ) ρu b 2 , and the outlet is all converted by stagnation pressure. Further, even near the stagnation point, the pressure increases near the point where the jet impinges on the object.

In FIG. 23, the pressure of the foot portion 66 on which the jet flow hits is high, and the pressure of the upper portion of the occupant 60 is low. Therefore, the warm air rises to the upper part of the occupant 60. However, Figure 2
As shown in FIG. 5, by blowing concentrated wind on the upper part of the head 61 of the occupant 60, the jet hits the roof 54 on the upper part of the occupant 60, and the pressure increases from the overhead 61 of the occupant 60 to the vicinity of the neck 63. Therefore, the flow having a low flow velocity rising from the feet 66 to the vicinity of the face 62 by the buoyancy flows avoiding the high pressure portion.

As described above, in addition to the air curtain effect, the warm air from the lower outlet 27 flows near the face 62 of the occupant 60, causing the bulkiness of the occupant's face 62 and the warm air stagnation near the face. It is possible to eliminate discomfort caused by warm air near the face 62 such as feeling.

A second embodiment of the present invention will be described. In this embodiment, a temperature Tface near the occupant's face obtained by a face room temperature sensor provided near the face of the occupant 60 is added as a control characteristic value.

The control content is substantially the same as that of the first embodiment, and the control content of the control step 110 of the first embodiment is compared with the temperature Tface near the face with a predetermined temperature Tcom, and Tface> Tcom. When
The same control as in step 110 is performed, and Tface <T
If it is com, the conditioned air blown from the upper outlet 25 is maintained in the diffusion mode, the blowing direction is chest, and the outlet temperature is constant at Tvi. The control content is the same as that in step 110.

With this control, it is possible to further increase the temperature of the air near the head of the occupant only when the temperature near the head is surely increased, and when Tface <Tcom, the upper air is blown. The diffused air from the outlet 25 serves as an air curtain, and the warm air blown from the lower outlet 27 can be prevented from flying up to the upper part of the occupant 60.

FIG. 26 shows a third embodiment of the present invention. In this embodiment, three outlets are provided in the vertical direction for one passenger in the front seat. Hereinafter, the uppermost, middle, and lowermost air outlets are referred to as an upper air outlet 81, a middle air outlet 82, and a lower air outlet 83, respectively. Here, the upper air outlet 81 and the middle air outlet 82 introduce the air conditioning air from the conventional ventilator air outlet corresponding portion of the air conditioner main body 11, and the lower air outlet 83 introduces the air conditioning air from the conventional foot air outlet corresponding portion. There is.

Next, the control method of the third embodiment will be described.
The control step is substantially the same as that of the first embodiment, and step 110
Only the difference will be described here. FIG. 27 shows the control contents of the step 210 in the third embodiment.
Shown in.

In step 210, the diffused air is constantly blown from the central outlet 82 to the chest 63 of the occupant 26 as shown in FIGS. 27 (c) and 27 (d). As a result, it is possible to prevent the warm air blown from the lower outlet port 83 from rising to the upper portion of the occupant 60 by the curtain effect.

As for the blowing directions from the upper and lower outlets 81 and 82, the lower outlets 83 are legs and knees as shown in FIG. 27 (f), and the upper outlets 81 are as shown in FIG. 27 (b). It blows over your head and face. The outlet mode of the lower outlet 83 is diffusion outlet as shown in FIG. When the lower blowing direction is the knee, the upper blowing direction is as shown in FIGS. 27 (f) and 27 (b).
As shown in, it is a squirt from above the head to the chest, and the other is a concentrated squirt above the head. At this time, the avoidance mode is selected as the blowing mode of the movement from the overhead to the face as shown in FIG. Here, the temperature of air blown out from the upper air outlet 81 and the middle air outlet 82 is set to be lower than the air temperature from the lower air outlet 83 (foot air outlet).

The control described in this step will be described with reference to FIGS. 28 and 29. In FIG. 28, the blowout mode of the lower outlet 83 is blown toward the feet 66 by diffusion blow, the diffused wind is blown from the middle blowout 82 to the chest 64 of the occupant 60, and the blowout mode of the upper blowout 81 is concentrated. FIG. By controlling in this manner, the warm air is blown to the entire feet, the warm air from the lower air outlet 83 is prevented from rising from the middle air outlet 82, and the concentrated air with a low temperature and a high flow velocity is emitted from the upper air outlet 81. By blowing out the air, it is possible to prevent hot air from drifting around the head 61 of the occupant 60, to eliminate the haze feeling of the occupant 60 and the bulkiness of the face 62, and the temperature distribution is a head cold foot heat state. .

FIG. 29 shows the blowing direction of the lower outlet 83, the mode is knee 65, diffusion, the middle outlet 82 is always chest, diffusion, and the outlet of the upper outlet 81 is overhead 61 to neck 63.
It is the figure which is moving in the avoidance mode near the face 62 between.

As described above, it is very uncomfortable to blow the conditioned air directly onto the face 62 of the occupant 60. By controlling in this manner, the face blow-out can be avoided and the occupant 60 as well as the head 61 of the occupant 60 can be prevented. Air having a high temperature near the face 62 is also blown by forced convection. Therefore, the haze and bulkiness of the occupant 60 can be further suppressed, and the temperature distribution of head cold foot heat can be maintained.

Next, in the blowing device of the third embodiment in which the slit-shaped outlets 81, 82, 83 are provided in the upper, middle, and lower stages, the uppermost outlet due to the pressure distribution formed in the passenger compartment. The effect that the diffused wind does not directly contact the occupant's face 62 even if the diffused blowout 56 swings from the head 61 to the neck 63 will be described.

30, FIG. 31, and FIG. 32 are slit-shaped outlets 8 at the upper, middle, and lower three locations in the third embodiment.
The main flow traces from the blowing device provided with 1, 82, 83 are illustrated. The setting conditions are each outlet 81, 8
A constant flow rate from 2,83, the blowing air temperature of the upper air outlet 81 and the middle air outlet 82 is 39 ° C, and the blowing air temperature of the lower air outlet 83 is 53 ° C.

FIG. 30 shows a case where diffused air is blown from the upper air outlet 81 toward the passenger's face portion 62 and diffused air is blown from the middle air outlet 82 toward the passenger's chest 64. FIG. 31 shows a case where diffused air is blown to the occupant's face 62 only from the upper outlet 81. FIG. 32 shows the flow traces when only diffused air is blown from the middle air outlet 82 toward the passenger's chest 64.

33 to 34 show a blowing method corresponding to FIGS. 30 to 31, respectively, in the plane from the upper outlet 81 to the occupant's face portion 62 shown by the broken line AA in FIGS. 30 to 31. It is the figure which showed the trace of the flow.

35 to 37 are views showing isobars of the pressure distribution for the front passenger 33 occupant 60 by the blowing method corresponding to each of FIGS. 30 to 32.

Using these figures, the pressure distribution formed in the vehicle interior causes the top air outlet 81 to be a diffuse air outlet, and the head 6
The effect that the diffused wind does not directly hit the occupant's face 62 even if the wing 1 swings from the top to the neck 63 will be described.

In FIG. 30 and FIG. 33, the air-conditioning wind temperature blown from the middle air outlet 82 toward the occupant's chest hits the chest 64 of the occupant 60 in the direction of the occupant's head 61, in the direction of the abdomen 67, and from the shoulder 68 to the side of the head. The airflow flows into.

The diffused air blown from the upper air outlet 81 toward the face portion 62 of the occupant 60 is the middle air outlet 8
Due to the pressure distribution formed by the blowout flow from 2, the occupant's face is avoided, and the air flows upward from the head 61 as shown in FIG. 30 and from the left and right sides of the head 61 as shown in FIG. 33.

On the other hand, in the case shown in FIGS. 31 and 34, the warm air blown from the upper outlet 61 toward the occupant's face 62 naturally hits the face 62 above the head 61 and the head 61. It flows from left and right to the rear.

Further, as shown in FIG. 32, the central air outlet 82
The air-conditioned warm air blown from the occupant toward the occupant's chest 64 hits the occupant's chest 64 and flows in the head 61 direction, the abdomen 67 direction, and the shoulder 68 in the temporal direction. in this way,
According to the pressure distribution formed by the blowout flow from the middle air outlet 82, the diffused air blown from the upper air outlet 81 toward the occupant's face 62 is suppressed from directly hitting the occupant's face 62. This will be described with reference to FIG.

As shown in FIG. 32, when the diffused air is blown to the chest 64 of the occupant 60, the flow hits the chest 64, and the airflow flowing toward the head 61 is directed to the roof 74 near the overhead.
Hit Therefore, as shown in FIG. 37, the pressure increases from around the chest 64 to above the head 61.

In the flow of this state, as shown in FIG. 30, even if the diffused wind is made to flow from the upper outlet 81 toward the face 62 of the occupant 60, the pressure near the face 62 is high, so the diffused wind is near the face 62. Flow around. The pressure distribution at this time is shown in FIG. The pressure on the face 62 is not high. It is possible to prevent the conditioned air from directly hitting the face 62 and eliminate discomfort.

In the case shown in FIGS. 31 and 36 in which there is no diffused wind from the middle air outlet 82 toward the chest, the upper air outlet 8
The blowout flow from 1 toward the occupant's face 62 directly hits the face 62, and the face 62 has a high pressure distribution as shown in FIG.

As described above, by blowing the diffused air toward the chest from the middle air outlet 82, the swing mode of the upper air outlet 81 from the head 61 to the neck 63 is the overhead concentrated mode,
Not only the avoidance mode from the head 61 to the neck 63 but also the concentrated mode above the head, the diffusion mode from the head 61 to the neck 63 can be set, and all can be set to the diffusion mode.

According to this embodiment, by blowing the conditioned air to the chest from the middle air outlet 82 in the constant diffusion mode,
Due to the air curtain effect, it is possible to prevent the airflow from the lower outlet port 83 from rising to the upper part of the occupant 60. Further, it is possible to prevent the warm air from directly hitting the occupant's face 62 when the blowing mode from the upper outlet 81 is set to the swing mode.

[0091]

As described above, according to the present invention, the air conditioning temperature from the lower outlet is controlled by blowing out the diffusion blow mode air from the outlet which is not the lowermost one of the plurality of outlets. The wind can be suppressed from rising near the upper part of the vehicle of the occupant. Further, the conditioned air from the uppermost air outlets of the plurality of air outlets blows off the hot air that has stagnated in the upper part of the vehicle, and when the uppermost air outlet oscillates up and down, the occupant of the occupant does not stop the air conditioned air. In order to swing the face part so that the conditioned air does not hit it, the blowing mode and the vertical blowing direction of the conditioned air from the plurality of relatively upper and lower outlets are controlled by correlating the upper and lower outlets. As a result, problems such as haze or bulkiness of the face due to the air conditioning wind of the occupant, lifting of clothes when the occupant is a woman, and blowing out to the occupant's face that causes discomfort to the occupant are eliminated. Can give you a feeling of comfort.

[Brief description of drawings]

FIG. 1 is a block diagram showing a functional configuration of the present invention.

FIG. 2 is a schematic overall configuration diagram showing a configuration of a first embodiment of the present invention.

FIG. 3 is a perspective view showing the air outlet device of the first embodiment.

FIG. 4 is a perspective view showing a mode switching unit of the first embodiment.

FIG. 5 is a perspective view showing a damper portion of the first embodiment.

FIG. 6 is a diagram showing the relationship between the blowing mode and the movement of the damper in the first embodiment.

FIG. 7 is a view showing a result of measurement of an airflow temperature distribution using an infrared thermometer when the blowing air velocity is 2 m / s and the temperature difference between the room temperature and the blowing air temperature is 40 ° C. of the first embodiment.

FIG. 8 is a diagram showing step 101 to step 106 of the flowchart for explaining the control operation of the first embodiment.

FIG. 9 is a diagram showing step 107 to step 112 of the flowchart for explaining the control operation of the first embodiment.

FIG. 10 is a diagram showing the control contents of step 109 of the flowchart for explaining the control operation of the first embodiment.

FIG. 11 is a side view showing a state in which the air is being blown toward the feet in the diffusion mode from the lower outlet of the first embodiment.

FIG. 12 is a side view showing a state in which the lower outlet of the first embodiment blows toward the knee in the concentrated mode.

FIG. 13 is a side view showing a state where the lower outlet of the first embodiment blows toward the chest in a diffusion mode.

FIG. 14 is a diagram showing the control content of step 110 of the flowchart for explaining the control operation of the first embodiment.

FIG. 15 is a side view showing a state in which conditioned air is blown from the upper outlet in the concentrated mode above the upper outlet and in the diffusion mode from the lower outlet to the feet in the diffusion mode of the first embodiment.

FIG. 16 is a side view showing a state in which conditioned air is being blown from the upper outlet in the face avoidance mode and from the lower outlet to the feet in the diffusion mode of the first embodiment.

FIG. 17 is a side view showing a state in which conditioned air is being blown from the upper outlet to the chest in the diffusion mode and from the lower outlet in the concentrated mode to the knee in the first embodiment.

FIG. 18 is a side view showing a trace of conditioned air blown from the lower outlet of the first embodiment to the knee in the concentrated mode.

FIG. 19 is a side view showing a trace of conditioned air blown out in a diffusion mode from the lower outlet of the first embodiment to the feet.

FIG. 20 is a side view showing the traces of the conditioned air blown in the diffusion mode from the upper outlet to the chest in the diffusion mode and from the lower outlet to the knee in the concentrated mode in the first embodiment.

FIG. 21 is a side view showing the traces of the conditioned air blown in the concentrated mode above the upper outlet and in the diffusion mode from the lower outlet to the feet in the first embodiment.

22 is a side view showing the pressure distribution in the blowout state shown in FIG.

23 is a side view showing the pressure distribution in the blowout state shown in FIG.

FIG. 24 is a side view showing the pressure distribution in the blowout state shown in FIG. 20.

FIG. 25 is a side view showing the pressure distribution in the blowout state shown in FIG. 21.

FIG. 26 is a perspective view showing a state of an outlet according to a third embodiment of the present invention.

FIG. 27 is a diagram showing the control contents of step 210 of the flowchart for explaining the control operation of the third embodiment.

FIG. 28 is a side view showing a state in which conditioned air is blown in a concentrated mode above the upper outlet, a diffusion mode in the chest from the middle outlet, and a diffusion mode in the foot from the lower outlet in the third embodiment. .

FIG. 29 is a side view showing a state in which conditioned air is being blown from the upper outlet to the face in the avoidance mode, from the middle outlet to the chest in the diffusion mode, and from the lower outlet to the knee in the diffusion mode in the third embodiment. .

FIG. 30 is a side view showing a state in which conditioned air is blown from the upper outlet of the third embodiment to the face in the diffusion mode and from the middle outlet to the chest in the diffusion mode.

FIG. 31 is a side view showing a state in which conditioned air is being blown from the upper outlet of the third embodiment to the face in the diffusion mode.

FIG. 32 is a side view showing a state in which conditioned air is being blown from the middle outlet of the third embodiment to the chest in the diffusion mode.

FIG. 33 is a plan view showing a trace in the blowing state shown in FIG. 30.

FIG. 34 is a plan view showing a trace in the blowing state shown in FIG. 31.

FIG. 35 is a side view showing the pressure distribution in the blowout state shown in FIG. 30.

FIG. 36 is a side view showing the pressure distribution in the blowout state shown in FIG. 31.

FIG. 37 is a side view showing the pressure distribution in the blowout state shown in FIG. 32.

[Explanation of symbols]

25 ... Upper outlet 27 ... Lower outlet 33 ... Instrument panel 34 ... Upper outlet device 36, 42 ... Mode switching unit 38, 44 ... Vertical wind direction switching unit 39, 45 ... Air distribution duct 40 ... Lower outlet device 46 ... Controller 51, 52, 53 ... Damper 81 ... Upper outlet 82 ... Chubu outlet 83 ... Lower outlet

Claims (3)

[Claims] 1. A mode switching unit for selecting a blowing mode of conditioned air, a vertical airflow direction switching unit capable of swinging the blowing direction of conditioned air in the vertical direction in the vehicle interior, and an air distribution duct connecting these two switching units. A plurality of blowout devices are arranged on the instrument panel in such a manner that a plurality of blowout devices are arranged above and below the blowout device located above the blowout device located at the bottom. An air conditioner for an automobile, characterized in that by blowing out diffusion mode air from the outlet, the air conditioning air blown out from the air outlet of the air outlet device located at the bottom is prevented from rising near the upper part of the occupant. 2. A mode switching unit for switching the blast mode of the conditioned air, a vertical air direction switching unit capable of swinging the blowing direction of the conditioned air vertically in the vehicle interior, and an air distribution duct unit connecting these two switching units. A plurality of blowout devices that are arranged relatively vertically above and below are installed on the instrument panel, and the upper part of the vehicle is conditioned by the conditioned air blown from the blowout device of the blowout device located at the top. When stagnant warm air is blown out and the vertical airflow direction switching section of the uppermost outlet device swings up and down, the respective outlet modes and outlet directions of the outlet devices located relatively above and below are correlated with each other. The air conditioner for an automobile is characterized in that the conditioned air from the uppermost air outlet device is prevented from hitting the occupant's face by changing the air conditioner. 3. A mode switching unit for switching the blowing mode of the conditioned air, a vertical airflow direction switching unit capable of swinging the blowing direction of the conditioned air up and down in the vehicle interior, and an air distribution duct unit connecting these two switching units. A plurality of blowout devices, each of which is arranged so as to be vertically positioned relative to each other, are installed on the instrument panel, and a blowout mode determining means,
Provided with blowout direction determining means and blowout mode determining means, and when the conditioned air from the blowout device located at the bottom is set upward from the horizontal direction, the conditioned air from the blowout device located at the top is diffused. In the mode, the air is blown to the occupant's chest, and when the air conditioning air from the air outlet device located at the bottom is directed downward from the horizontal direction, the temperature that stagnates at the top of the vehicle by the air conditioning air blown out from the air outlet device at the top. When the airflow is blown and the air-conditioning air blowing direction of the uppermost outlet device is vertically swung, the respective blowing modes and blowing directions of the upper and lower outlet devices are relatively correlated with each other. The air-conditioning system for automobiles is characterized in that the air-conditioning wind of the blow-out device located at the top is prevented from hitting the occupant's face.