JP3783607B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicular air conditioner capable of automatically controlling the air conditioning capacity such as the air volume and temperature of air conditioned air blown into a vehicle interior, and more particularly to an antifogging control for antifogging a vehicle window.
[0002]
[Prior art]
Conventionally, a vehicle air conditioner controls the air volume, temperature, etc. of the air-conditioning air to be blown to make the passenger compartment a comfortable environment, removes fogging of the window, and prevents fogging of the window. The purpose is to ensure visibility and enable safe and comfortable driving.
[0003]
[Problems to be solved by the invention]
However, even if the conventional vehicle air conditioner is in a foot / defroster (F / D) mode with automatic control, the vehicle interior is heated and the window is fogged. Cannot judge whether it is clear with anti-fogging ability.
[0004]
In the description of Japanese Patent No. 2933675, there is an apparatus that detects the fogging of a window by combining condensation detection means with an air conditioner for an automobile, and controls the defroster ability so that the fogging clears, but the cost is very high. In addition, a cycle in which cloudiness occurs, the cloudiness is detected by the dew condensation detection means, and then clearing is not sufficient to secure visibility.
[0005]
Nonetheless, if you simply use the auto control to increase the defroster capacity by raising the blowout air volume and temperature from the defroster outlet as a safe side, comfort will deteriorate due to increased noise and the occupant's face being hot. There's a problem.
[0006]
The present invention has been made in view of the above-described conventional problems, and its purpose is to suppress the deterioration of comfort due to noise, hot flash of the face, etc. in the auto F / D mode where it is not known whether it is really cloudy. An object of the present invention is to provide a vehicle air conditioner capable of performing the above.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention employs the following technical means.
[0008]
In the first aspect of the present invention, when the air conditioning control means (10) is based on the auto setting means (60), the amount of air conditioned air blown to the window or the air distribution ratio when compared with the case based on the manual setting means (57). The air-conditioning control means (10) is provided with a blow-out mode display means (52) for indicating the air outlet mode to the occupant, and the air-conditioning control means (10) When the air outlet mode increases the air distribution ratio, the air outlet mode display means (52) displays a mode with a large air volume ratio to the passenger's feet .
[0009]
As a result, when the auto-control mode is set to prevent fogging of the window as the F / D mode, it reduces the air-conditioning wind to the window, which does not know whether it is really cloudy, so it is comfortable due to noise and hot flashes on the face. Sexual deterioration can be suppressed. On the other hand, when the F / D mode is selected by manual setting, it corresponds to the situation where the defogging of the window is also necessary according to the occupant's will, and the defogging is done by increasing the air conditioning wind to the window from the automatic control. Gender priority driving is performed. In addition, when the air-conditioning wind to the window is reduced in the F / D mode in the auto control, the display of the mode in which the air volume ratio to the passenger's feet is large causes the cloudiness of the window to be clear. But don't let the crew feel uncomfortable.
[0010]
Incidentally, the increase / decrease of the conditioned air to the window may change the air volume ratio (wind distribution ratio) between the passenger's feet and the window by manipulating the opening degree of the mode switching door.
[0013]
In the second aspect of the invention, the air conditioning control means (10) performs the air volume operation performed in the air outlet mode for increasing the air flow rate or the air distribution ratio of the air conditioned air to the window, and the air outlet mode is released. It is characterized by releasing at the same time.
[0014]
As a result, for example, even in the F / D mode with auto control, even if the airflow to the window is reduced, the F / D mode is canceled and the mode is canceled at the same time as the mode is shifted to another mode. As a result, occupant convenience is improved.
[0017]
In the invention according to claim 3 , when the air conditioning control means (10) increases the amount of air conditioned air blown to the window or the distribution ratio based on the auto setting means (60), the environmental conditions that affect the cloudiness of the window In accordance with the above, the amount of air blown into the window or the distribution ratio is varied.
[0018]
This provides anti-fogging control that adjusts the conditioned air according to the ease of fogging in the window from environmental conditions, and automatically reduces the conditioned air when environmental conditions are difficult to cloud, making it more comfortable to avoid burning the face Gender priority control.
[0019]
According to a fourth aspect of the present invention, the vehicle air conditioner has a function of controlling the air conditioning of the plurality of air conditioning zones independently of each other, and the air conditioning control means (10) is configured to control the air conditioning wind to the window for each of the plurality of air conditioning zones. Means is provided for setting the blown air volume or the air distribution ratio. As a result, it is possible to set the left and right independent control vehicles or the like according to the preferences of the left and right people.
[0020]
In the invention according to claim 5 , when the air conditioning control means (10) is based on the auto setting means (60), the condition for shifting to the outlet mode for increasing the amount of air conditioned air blown to the window or the air distribution ratio is set. A setting means (57) that can be changed by the operation of the passenger is provided.
[0021]
According to each person's preference, the condition for switching to the F / D mode in which the conditioned air is blown from the defroster outlet that affects the hot flash of the face is varied. By changing the temperature condition for switching to the D mode, the F / D mode can be made easily or difficult.
[0022]
Thereby, the reference numerals in parentheses of the above means are examples that show the correspondence with the specific means described in the embodiments described later.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0024]
(First embodiment)
1 to 5 show a first embodiment of the present invention, and FIG. 1 shows the overall configuration of an automatic air conditioner system. 2 is a view showing an instrument panel, and FIG. 3 is a view showing an air conditioner operation panel.
[0025]
The vehicle air conditioner of this embodiment, a so-called car air conditioner, includes an air conditioning control means (hereinafter referred to as an air conditioning control means (hereinafter referred to as “actuator”)) in the air conditioning unit 1 for air conditioning the interior of a vehicle such as an automobile equipped with a water cooling engine for traveling. It is an automatic air conditioner system configured to be controlled by an air conditioner ECU) 10.
[0026]
The air conditioning unit 1 has a temperature adjustment and air outlet mode between the air conditioning zone on the driver's seat side (including the rear seat behind the driver's seat) and the air conditioning zone on the passenger seat side (including the rear seat behind the passenger seat). This is an air conditioner unit that can be changed independently of each other.
[0027]
The air conditioning unit 1 includes an air conditioning duct 2 disposed in front of the vehicle interior of the vehicle. An inside / outside air switching door 3 and a blower 4 are provided on the upstream side of the air conditioning duct 2 to form a blower unit as inside / outside air blowing means. The inside / outside air switching door 3 is a suction port switching means that is driven by an actuator such as a servo motor 5 to change the opening (so-called suction port mode) between the inside air suction port 6 and the outside air suction port 7.
[0028]
The blower 4 is a centrifugal blower that is rotationally driven by a blower motor (blower fan drive means) 9 controlled by a blower drive circuit 8 to generate an air flow toward the vehicle interior in the air conditioning duct 2. In addition, the blower 4 is respectively directed toward the driver seat side in the passenger compartment and the passenger seat side air-conditioning zone (in particular, the driver seat side and the passenger seat side front window) from the respective outlets on the driver seat side and the passenger seat side, which will be described later. A blown air volume variable means or a blown air speed variable means for changing the blown air volume or blown air speed of the conditioned air blown is configured.
[0029]
An evaporator (cooling heat exchanger) 41 is provided in the center of the air conditioning duct 2 as air cooling means for cooling the air passing through the air conditioning duct 2. A heater core (heating heat exchanger) 42 is provided on the air downstream side of the evaporator 41 to heat the air passing through the first and second air passages 11 and 12 by exchanging heat with the engine coolant. ing. The first and second air passages 11 and 12 are partitioned by a partition plate 14. For example, in a vehicle air conditioner used in a vehicle that travels using electric power, the evaporator may be changed to a Peltier element.
[0030]
On the air upstream side of the heater core 42, the driver's seat side and passenger's seat side air mix (A / M) for independently adjusting the temperature of the driver's seat side air conditioning zone and the passenger seat side air conditioning zone in the passenger compartment. Doors 15 and 16 are provided. The driver's seat side and passenger seat side A / M doors 15 and 16 are driven by actuators such as servo motors 17 and 18, and driver seats in the passenger compartment from the respective outlets on the driver's seat side and passenger seat side, which will be described later. The driver side and passenger side blowing temperature variable means for changing the temperature of the air-conditioning air blown toward the passenger side and passenger side air conditioning zones (particularly the driver seat side and the passenger seat side front window) are configured. .
[0031]
Here, the evaporator 41 of this embodiment constitutes one component of the refrigeration cycle. The refrigeration cycle is driven by a belt on the output shaft of a vehicle running engine mounted in the engine room of the vehicle, and compresses and discharges the refrigerant, and the refrigerant discharged from the compressor. A refrigerant condenser (condenser) for condensing and liquefying, a liquid receiver (receiver) for gas-liquid separation of the liquid refrigerant flowing from the condenser, an expansion valve (expansion valve) for adiabatically expanding the liquid refrigerant flowing from the receiver, The above-described evaporator (refrigerant evaporator) that evaporates and vaporizes the refrigerant in the gas-liquid two-phase state that has flowed in from the expansion valve.
[0032]
In these internal compressors, the rotational force from the engine is interrupted by an electromagnetic clutch controlled by the air conditioner ECU 10. When the electromagnetic clutch is turned on and the compressor is activated, the evaporator 41 cools and dehumidifies the air passing through the air conditioning duct 2, so that the temperature in the passenger compartment is lowered and the inside of the window including the front window is hardly fogged. .
[0033]
In the present embodiment, an electromagnetic type that performs variable capacity control based on a control signal output in accordance with a comparison result between a post-evaporation temperature (TE) that is a detection value of the post-evaporation temperature sensor 74 and a target post-evaporation temperature (TEO). A variable capacity compressor having a variable capacity control valve is used.
[0034]
As shown in FIGS. 1 and 2, at the air downstream end of each outlet duct communicating with the air downstream side of the first air passage 11, a driver seat side defroster (DEF) outlet 20, a driver seat side center face are provided. A (FACE) outlet 21, a driver's seat side face (FACE) outlet 22, and a driver's seat foot (FOOT) outlet 23 are open.
[0035]
Further, as shown in FIGS. 1 and 2, at the air downstream end of each outlet duct communicating with the air downstream side of the second air passage 12, a passenger seat side defroster (DEF) outlet 30, a passenger seat side center face are provided. A (FACE) outlet 31, a passenger seat side face (FACE) outlet 32 and a passenger seat foot (FOOT) outlet 33 are open.
[0036]
The driver's seat and passenger's side DEF outlets 20 and 30 constitute outlets for blowing conditioned air (mainly hot air) to the front window, and the driver's side and passenger's side FACE outlet 22. , 32 constitute a blowout port for blowing conditioned air (mainly hot air) to the side window.
[0037]
In the first and second air passages 11 and 12, the driver seat side and passenger seat side air outlet switching doors for setting the air outlet mode on the driver seat side and the passenger seat side in the vehicle interior independently of each other are provided. 24-26 and 34-36 are provided. The driver seat side and passenger seat side outlet switching doors 24 to 26, 34 to 36 are driven by actuators such as servo motors 28, 29, 38, and 39 to switch the driver seat side and passenger seat side outlet modes. Each mode switching door constitutes an air volume ratio adjusting means.
[0038]
Here, there are a FACE mode, a B / L mode, a FOOT mode, a FOOT / DEF mode, a DEF mode, and the like as the air outlet mode on the driver seat side and the passenger seat side. The driver side and passenger side outlet switching doors 24 and 34 are driver side and passenger side defrosters that can open and close the driver side and passenger side DEF outlets 20 and 30 independently of each other. Servo motors 28 and 38 that drive the doors constitute an actuator for anti-fogging means that performs control effective to prevent window fogging or frosting or to remove window fogging or frosting.
[0039]
The air conditioner ECU 10 corresponds to the air conditioning control means of the present invention. When an ignition switch for starting and stopping the engine is turned on (IG / ON), a battery (not shown) that is an in-vehicle power source mounted on the vehicle. When the DC power source is supplied from (), arithmetic processing and control processing are started. As shown in FIGS. 1 and 2, the air conditioner ECU 10 is configured such that each switch signal is input from various operation switches on an air conditioner operation panel 51 that is integrally installed on the instrument panel 50. .
[0040]
The air conditioner operation panel 51 includes a liquid crystal display (LCD) 52, an inside / outside air switch 53, a front defroster switch (hereinafter referred to as DEF switch) 54, a rear defroster (defogger) switch 55, a dual switch 56, Air outlet mode switch 57, blower air flow switch 58, A / C switch 59, AUTO switch 60, OFF switch 61, driver side (DRIVER) side temperature setting switch 62, passenger seat (PASSENGER) side temperature setting switch 63, a low fuel consumption improvement switch 64, and the like are installed.
[0041]
The dual switch 56 is a left / right independent control command means for commanding left / right independent temperature control in which temperature adjustment in the driver's seat side air conditioning zone and temperature adjustment in the passenger seat side air conditioning zone are performed independently of each other. The DEF switch 54 corresponds to an air-conditioning switch that commands whether or not to increase the anti-fogging capability of the front window. The DEF switch 54 requests that the air outlet mode (MODE) be fixed (set) to the DEF mode. It is a mode request means.
[0042]
The MODE changeover switch 57 corresponds to the setting means of the present invention, and corresponds to an air conditioning switch for instructing whether or not to increase the anti-fogging capability of the front window. (MODE) is F / D mode requesting means for requesting to fix (set) FACE mode, B / L mode, F / D mode, or FOOT mode.
[0043]
The liquid crystal display 52 includes a set temperature display unit for visually displaying the set temperatures of the driver side and passenger side air conditioning zones, an outlet mode display unit (blow mode display means) for visually displaying the outlet mode, and a blower air volume. An air volume display unit for visual display is provided. The liquid crystal display 52 may be provided with an outside air temperature display unit, a suction port mode display unit, and a time display unit. Various operation switches on the air conditioner operation panel 51 may be provided on the liquid crystal display 52.
[0044]
The A / C switch 59 is an air conditioning operation switch for instructing start or stop of the compressor of the refrigeration cycle. In general, the A / C switch 59 is provided in order to increase fuel efficiency by turning off the compressor and reducing the rotational load of the engine.
[0045]
The driver seat side temperature setting switch 62 is a driver seat side temperature setting means for setting the temperature in the driver seat side air conditioning zone to a desired temperature, and includes an up switch 62a and a down switch 62b. The passenger side temperature setting switch 63 is a driver side temperature setting means for setting the temperature in the passenger side air conditioning zone to a desired temperature, and includes an up switch 63a and a down switch 63b.
[0046]
Further, the low fuel consumption improvement switch 64 is an economy (ECON) switch that instructs whether or not to perform economical air-conditioning control in consideration of low fuel consumption and power saving by reducing the operating rate of the compressor of the refrigeration cycle.
[0047]
The air conditioner ECU 10 includes functions such as a central processing unit (CPU) that performs arithmetic processing and control processing, a memory (ROM or EEOROM, RAM), and an I / O port (input / output circuit). A known microcomputer is provided, and sensor signals from various sensors are A / D converted by an I / O port or an A / D conversion circuit and then input to the microcomputer.
[0048]
That is, the air conditioner ECU 10 includes an inside air temperature sensor 71 as an inside air temperature detecting means for detecting a vehicle interior temperature (inside air temperature), an outside air temperature sensor 72 as an outside air temperature detecting means for detecting a vehicle outside temperature (outside air temperature), and A solar radiation sensor 73 is connected as solar radiation detection means.
[0049]
Further, a post-evaporation temperature sensor 74 as post-evaporation temperature detection means for detecting the air temperature immediately after passing through the evaporator 41 (hereinafter referred to as post-evaporation temperature TE), and cooling as cooling water temperature detection means for detecting the engine cooling water temperature of the vehicle. A water temperature sensor 75, a humidity sensor 76 as humidity detecting means for detecting the relative humidity in the passenger compartment, and a refrigerant pressure sensor 77 that is attached between the high pressure side receiver and the expansion valve of the refrigeration cycle and detects the high pressure side pressure. Etc. are connected.
[0050]
Here, the humidity sensor 76 is housed in a recess formed in the front surface of the instrument panel 50 in the vicinity of the driver's seat together with the inside air temperature sensor 71. The recess is closed by a lid 50a having a vent hole.
[0051]
Among these, for the inside air temperature sensor 71, the outside air temperature sensor 72, the after-evaporation temperature sensor 74, and the cooling water temperature sensor 75, for example, temperature sensitive elements such as a thermistor are used. Further, the solar radiation sensor 73 includes a driver-seat-side solar radiation intensity detecting means (for example, a photodiode) for detecting a solar radiation amount (solar radiation intensity) TS (Dr) irradiated in the driver-seat-side air conditioning zone, and a passenger-seat-side air conditioning zone. And a passenger seat side solar radiation intensity detecting means (for example, a photodiode) for detecting the amount of solar radiation (solar radiation intensity) TS (Pa) irradiated to the vehicle.
[0052]
Next, a control method by the air conditioner ECU 10 will be described with reference to FIG. Here, FIG. 4 is a flowchart showing an example of a control program of the air conditioner ECU 10.
[0053]
First, when the ignition switch is turned on and DC power is supplied to the air conditioner ECU 10, execution of a control program (routine in FIG. 4) stored in advance in the ROM is started. At this time, the contents stored in the data processing memory (RAM) built in the microcomputer inside the air conditioner ECU 10 are initialized (step S1).
[0054]
Next, various data are read into a data processing memory (RAM). That is, switch signals from various operation switches on the air conditioner operation panel 51 and sensor signals from various sensors are input (step S2).
[0055]
In particular, the output signal TR corresponding to the vehicle interior temperature that is the detection value of the internal air temperature sensor 71, the output signal TAM corresponding to the external air temperature that is the detection value of the external air temperature sensor 72, and the solar radiation amount that is the detection value of the solar radiation sensor 73. Corresponding output signals TS (Dr), TS (Pa), an output signal TE corresponding to the post-evaporation temperature which is the detection value of the post-evaporation sensor 74, and an output signal TW corresponding to the cooling water temperature which is the detection value of the cooling water temperature sensor 75 Enter.
[0056]
Next, based on the stored data and the stored calculation formula, the target blowing temperature TAO (Dr) on the driver's seat side and the target blowing temperature TAO (Pa) on the passenger seat side are calculated (step S3). ). Next, the blower airflow {blower control voltage VA (Dr), VA to be applied to the blower motor 9 based on the target blowing temperature TAO (Dr), TAO (Pa) on the driver's seat and passenger's seat obtained in step S3 above. (Pa)} is calculated (step S4).
[0057]
Actually, the blower control voltage VA described above is set in advance to the blower control voltages VA (Dr) and VA (Pa) respectively adapted to the target blowing temperatures TAO (Dr) and TAO (Pa) on the driver side and passenger side. While obtaining based on the determined characteristic pattern, the blower control voltages VA (Dr) and VA (Pa) are averaged.
[0058]
Next, the A / M opening SW (Dr) (%) of the driver's seat side A / M door 15 and the passenger's seat side A / M door 16 are determined based on the stored data and the stored arithmetic expression. A / M opening degree SW (Pa) (%) is calculated (step S5). The target blowing temperatures TAO (Dr) and TAO (Pa) on the driver's seat side and the passenger seat side are based on those obtained in step S3.
[0059]
Next, a routine shown in FIG. 5 to be described later is activated to perform window anti-fogging control (step S6). Next, the feedback control (PI control) is used for the compressor so that the target post-evaporation temperature (TEO) determined in the above step matches the actual post-evaporation temperature (TE) detected by the post-evaporation sensor 74. A target discharge amount is determined (step S7). Specifically, the calculation is performed based on an arithmetic expression storing a solenoid current (control current: In) that is a target value of a control current supplied to an electromagnetic solenoid of an electromagnetic capacity control valve attached to the compressor.
[0060]
Next, a control signal is output to the blower drive circuit 8 so that the blower control currents VA (Dr) and VA (Pa) determined in step S4 are obtained (step S8). Next, a control signal is output to the servomotors 17 and 18 so that the A / M opening degree SW (Dr) and SW (Pa) determined in step S5 are obtained (step S9).
[0061]
Next, a control signal is output to the servomotors 28, 29, 38, and 39 so as to be in the outlet mode determined in step S6 (step S10). Next, the solenoid current (control current: In) determined in step S7 is output to the electromagnetic solenoid of the electromagnetic capacity control valve attached to the compressor (step S11). Thereafter, the control process returns to step S2.
[0062]
Next, control related to the window antifogging control by the air conditioner ECU 10 will be described with reference to FIGS. First, FIG. 5 is a flowchart showing the control related to the anti-fogging control, and is an example in which the upper limit of the opening degree of the DEF door is varied by varying the amount of blown air to the window. Since these controls are performed independently on the driver's seat side and the passenger seat side, the following description will be made on the driver seat side.
[0063]
First, when the routine of FIG. 5 is started, it is determined in step S21 whether or not the outlet mode is the F / D (FOOT / DEF) mode, and if it is the F / D mode, it is determined whether the control is automatic control or manual setting. If the determination result is NO (other than the F / D mode), the process returns to repeat the determination in step S21.
[0064]
In step S21, if the F / D mode is set manually, the process proceeds to step S22 to set the upper limit of the DEF door opening to 25 degrees. In step S21, when the F / D mode is set and the automatic control is performed, the process proceeds to step S23, where the upper limit of the DEF door opening is set to 20 degrees.
[0065]
Next, features of the present embodiment will be described. When based on auto control, the air conditioner ECU 10 reduces the amount of air conditioned air blown to the window or the distribution ratio compared to the case based on manual settings.
[0066]
As a result, when the auto-control mode is set to prevent fogging of the window as the F / D mode, it reduces the air-conditioning wind to the window, which does not know whether it is really cloudy, so it is comfortable due to noise and hot flashes on the face. Sexual deterioration can be suppressed. On the other hand, when the F / D mode is selected by manual setting, it corresponds to the situation where the defogging of the window is also necessary according to the occupant's will, and the defogging is done by increasing the air conditioning wind to the window from the automatic control. Gender priority driving is performed.
[0067]
(Second Embodiment)
FIG. 6 is a flowchart showing control related to anti-fogging control in the second embodiment of the present invention. When the routine of FIG. 6 is started, it is determined in step S31 whether or not the outlet mode is the F / D mode, and if it is the F / D mode, whether it is auto control or manual setting. If the determination result is NO (other than the F / D mode), the process returns to repeat the determination in step S31.
[0068]
If the F / D mode is set manually and the manual setting is made in step S31, the process proceeds to step S32, and the preference data of the environment inputted and set by the occupant is read. As a means for inputting and setting the passenger's preference, for example, after the passenger selects the F / D mode with the MODE switch 57 of the air conditioner operation panel 51, the up switch 62a, 63a or the down switch on the driver side or the passenger side The preference may be selected by 62b and 63b.
[0069]
Next, in step S33, it is determined from the read preference data whether the blowing ratio from DEF is classified into high, medium and low levels. As a result, if the blowing rate is classified as high in step S33, the process proceeds to step S34, and the opening degree of the DEF door is set to 30 degrees. Similarly, if the blowing rate is classified as medium or no input in step S33, the process proceeds to step S35 and the opening degree of the DEF door is set to 25 degrees. Similarly, if the blowing rate is classified as low in step S33, the process proceeds to step S36, and the opening degree of the DEF door is set to 20 degrees.
[0070]
If the F / D mode is in the auto control in step S31, the process proceeds to step S37, and the preference data of the environment input and set by the occupant by manual operation is read as in the case of manual setting. In step S38, it is determined from the read preference data whether the blowing ratio from DEF is classified into high, medium, and low levels. As a result, if the blowing rate is classified as high in step S38, the process proceeds to step S39, and the opening degree of the DEF door is set to 25 degrees.
[0071]
Similarly, if the blowing rate is classified as medium or no input in step S38, the process proceeds to step S40 and the opening degree of the DEF door is set to 20 degrees. Similarly, when the blowing rate is classified as low in step S38, the process proceeds to step S41, and the opening degree of the DEF door is set to 15 degrees.
[0072]
As a feature of the present embodiment, the air conditioner ECU 10 is provided with means for setting the amount of air conditioned air blown to the window or the distribution ratio, respectively, based on auto control and based on manual settings. .
[0073]
As a result, for example, when a mode in which the window is also anti-fogged is set as an F / D mode by automatic control, the air conditioning wind to the window, which is not known whether it is really clouded, is reduced, and comfort due to noise, hot flashes, etc. It becomes possible to make settings so as to be more comfortable so as to suppress deterioration.
[0074]
Also, in this embodiment, comfort can be improved by adjusting the air conditioning airflow to the window according to the preference for the warm air felt on each person's face and the preference for the balance between the heating ability and the defroster ability. Can do.
[0075]
(Third embodiment)
FIG. 7 is a flowchart showing control related to anti-fogging control in the third embodiment of the present invention. When the routine of FIG. 7 is started, it is determined in step S51 whether or not the outlet mode is the F / D mode, and if it is the F / D mode, it is determined whether the control is automatic control or manual setting.
[0076]
In step S51, if the F / D mode is set manually and the manual setting is made, the process proceeds to step S52, and the air volume at the blower is increased to a predetermined value. In step S51, if the F / D mode is set and the automatic control is performed, the process proceeds to step S53, and the air volume at the blower is reduced to a predetermined value.
[0077]
If the determination result in step S51 is NO (other than the F / D mode), the process proceeds to step S54. If the mode is switched from the F / D mode, the increase in the blower air volume performed in the F / D mode is performed. Alternatively, the reduction treatment is canceled simultaneously with the mode switching.
[0078]
As a feature of this embodiment, the air conditioner ECU 10 cancels the air volume operation performed in the air outlet mode for increasing the air flow rate or the air distribution ratio of the air conditioned air to the window at the same time as the air outlet mode is released. is doing. As a result, for example, even in the F / D mode with auto control, even if the airflow to the window is reduced, the F / D mode is canceled and the mode is canceled at the same time as the mode is shifted to another mode. As a result, occupant convenience is improved.
[0079]
(Fourth embodiment)
FIG. 8 shows a fourth embodiment of the present invention, and is a flowchart showing control related to anti-fogging control. The outline relates to the display of the blowing mode on the liquid crystal display 52 or the like, and is executed simultaneously with the anti-fogging control in steps S22 and S23 in the first embodiment.
[0080]
First, when the routine of FIG. 8 is started, it is determined in step S61 whether or not the air outlet mode is the F / D mode, and if the air outlet mode is the F / D mode, it is determined whether the control is automatic control or manual setting. If the determination result is NO (other than the F / D mode), the process returns to repeat the determination in step S61.
[0081]
If the F / D mode is set in step S61 and manual setting is selected, the process proceeds to step S62, and the display is set to the F / D mode. In step S61, if the F / D mode is set and the automatic control is performed, the process proceeds to step S63, and the display is set to the FOOT mode.
[0082]
As a feature of this embodiment, the air conditioner ECU 10 includes a liquid crystal display 52 that indicates the air outlet mode for the occupant, and the air conditioner ECU 10 increases the amount of air conditioned air blown to the window or the air distribution ratio based on automatic control. When the exit mode is set, the liquid crystal display 52 displays the FOOT mode in which the air volume ratio to the passenger's feet is large.
[0083]
As a result, the air-conditioning airflow to the window is reduced in the F / D mode in the auto control, whereas the cloudiness of the window is not clear by displaying the FOOT mode in which the air volume ratio to the passenger's feet is large. Even in this case, the passenger does not feel uncomfortable.
[0084]
(Fifth embodiment)
FIG. 9 shows a fifth embodiment of the present invention, and is a flowchart showing control related to anti-fogging control. First, when the routine of FIG. 9 is started, it is determined in step S71 whether or not the air outlet mode is the F / D mode, and if the air outlet mode is the F / D mode, it is determined whether the control is automatic control or manual setting. If the determination result is NO (other than the F / D mode), the process returns to repeat the determination in step S71.
[0085]
If the F / D mode is set manually and the manual setting is made in step S71, the process proceeds to step S72, and it is determined whether or not the outside air temperature TAM is lower than 0 ° C. If the determination result is NO and is 0 ° C. or higher, the process returns to repeat the determinations in steps S71 and S72.
[0086]
If the outside air temperature TAM is lower than 0 ° C., the process proceeds to step S73, and it is further determined whether or not the outside air temperature TAM is lower than −5 ° C. If the determination result is YES and the ambient temperature TAM is lower than −5 ° C. and the window is likely to be cloudy, the process proceeds to step S74, and the upper limit of the DEF door opening is set to 25 degrees.
[0087]
If the determination result is NO and the so-called outside air temperature TAM is in the range of 0 to -5 ° C and the window is in an environmental condition where the degree of cloudiness is small, the process proceeds to step S75, and the upper limit of the DEF door opening is set to 20 degrees. The anti-fogging operation gives priority to comfort.
[0088]
Further, in step S71, if the F / D mode is in the automatic control, the process proceeds to step S76, and it is determined whether or not the outside air temperature TAM is lower than 0 ° C. as in the case of manual setting. If the determination result is NO and is 0 ° C. or higher, the process returns to repeat the determinations in steps S71 and S76.
[0089]
If the outside air temperature TAM is lower than 0 ° C., the process proceeds to step S77, and it is further determined whether or not the outside air temperature TAM is lower than −5 ° C. If the determination result is YES and the ambient temperature TAM is lower than −5 ° C. and the window is easily cloudy, the process proceeds to step S78, and the upper limit of the DEF door opening is set to 20 degrees.
[0090]
If the determination result is NO, the so-called outside temperature TAM is in the range of 0 to -5 ° C, and the environmental condition is that the degree of fogging of the window is small, the process proceeds to step S79, and the upper limit of the DEF door opening is set to 15 degrees. The anti-fogging operation gives priority to comfort.
[0091]
As a feature of this embodiment, the air conditioner ECU 10 increases the amount of air-conditioning air blown to the window or the distribution ratio based on the automatic control, so that the air conditioner ECU 10 applies the air conditioner to the window according to environmental conditions that affect the cloudiness of the window. The amount of air conditioned air blown or the distribution ratio is variable.
[0092]
This provides anti-fogging control that adjusts the conditioned air according to the ease of fogging in the window from environmental conditions, and automatically reduces the conditioned air when environmental conditions are difficult to cloud, making it more comfortable to avoid burning the face Gender priority control.
[0093]
However, since the purpose of the previous steps S72, S73, S76, and S77 is to determine whether or not the window is in an environmental condition in which the window is likely to be cloudy, it is not limited to the outside air temperature TAM, for example, the solar radiation amount TS or the vehicle interior temperature TR or humidity or You may determine the conditions which are easy to become cloudy and difficult to cloud by glass temperature etc.
[0094]
(Sixth embodiment)
The vehicle of this embodiment is a left and right independent control vehicle, and the vehicle air conditioner has a function of controlling air conditioning of a plurality of left and right air conditioning zones independently of each other. FIG. 10 is a flowchart showing control related to the anti-fogging control of the right air-conditioning zone in the sixth embodiment of the present invention. The air conditioning zones are performed independently of each other.
[0095]
In step S81, it is determined whether or not the air outlet mode in the right air-conditioning zone is the F / D mode, and if it is the F / D mode, it is determined whether the control is automatic control or manual setting. If the determination result is NO (other than the F / D mode), the process returns to repeat the determination in step S81.
[0096]
In step S81, if the F / D mode is set manually, the process proceeds to step S82, and right passenger's preference data is read. Next, in step S83, it is determined from the read preference data whether the blowing rate from DEF is classified into high, medium and low levels.
[0097]
As a result, when the blowing rate is classified as high in step S83, the process proceeds to step S84, and the opening degree of the DEF door is set to 30 degrees. Similarly, if the blowing rate is classified as medium or no input in step S83, the process proceeds to step S85 and the opening degree of the DEF door is set to 25 degrees. Similarly, if the blowing rate is classified as low in step S83, the process proceeds to step S86, and the opening degree of the DEF door is set to 20 degrees.
[0098]
If the air outlet mode in the right air-conditioning zone is the F / D mode and the automatic control is performed in step S81, the process proceeds to step S87, and right passenger's preference data is read in the same way as in the manual setting. In step S88, it is determined from the read preference data whether the blowing ratio from DEF is classified into high, medium, and low levels. As a result, when the blowing rate is classified as high in step S88, the process proceeds to step S89, and the opening degree of the DEF door is set to 25 degrees.
[0099]
Similarly, if the blowing rate is classified as medium or no input in step S88, the process proceeds to step S90 and the opening degree of the DEF door is set to 20 degrees. Similarly, if the blowing rate is classified as low in step S88, the process proceeds to step S91, and the opening degree of the DEF door is set to 15 degrees.
[0100]
As a feature of this embodiment, the vehicle air conditioner has a function of controlling air conditioning of a plurality of air conditioning zones independently of each other, and the air conditioner ECU 10 controls the amount of conditioned air blown into the window for each of the plurality of air conditioning zones. Alternatively, a means for setting the air distribution ratio is provided. As a result, it is possible to set the left and right independent control vehicles or the like according to the preferences of the left and right people.
[0101]
(Seventh embodiment)
FIG. 11 shows a seventh embodiment of the present invention, and is a flowchart showing control related to anti-fogging control. This is an example in which the condition for switching to the F / D mode is varied in the automatic air outlet control mode in which the air outlet mode is automatically changed. When the routine of FIG. 11 starts, first, passenger preference data is read in step S101.
[0102]
Next, the temperature conditions and the like for switching to the F / D mode by automatic control are changed from the preference data read in step S102. For example, in the present embodiment, the switching condition from the read preference data is an example in which the outside temperature TAM is 0 ° C. or less.
[0103]
Then, in the next step S103, it is determined whether or not the outside air temperature TAM is lower than the switching condition of 0 ° C. If the determination result is NO, and so-called 0 ° C. or higher and it is difficult for the window to become cloudy, the process returns to prevent switching to the F / D mode. If the outside air temperature TAM is lower than 0 ° C., the process proceeds to step S104. The F / D mode in the automatic control is executed.
[0104]
As a feature of this embodiment, when the air conditioner ECU 10 is based on automatic control, the condition for shifting to the air outlet mode for increasing the amount of air conditioned air blown to the window or the air distribution ratio can be changed by the operation of the occupant. Setting means is provided.
[0105]
This changes the conditions for switching to the F / D mode in which the conditioned air is also blown out from the defroster outlet that affects the burning of the face according to each person's preference. It becomes possible to make it easy to become difficult.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing the overall configuration of an automatic air conditioner system.
FIG. 2 is a front view showing an instrument panel of the vehicle.
FIG. 3 is a front view showing an air conditioner operation panel.
FIG. 4 is a flowchart showing a control program of the air conditioner ECU.
FIG. 5 is a flowchart showing control related to anti-fogging control (first embodiment).
FIG. 6 is a flowchart showing control related to anti-fogging control (second embodiment).
FIG. 7 is a flowchart showing control related to anti-fogging control (third embodiment).
FIG. 8 is a flowchart showing control related to anti-fogging control (fourth embodiment).
FIG. 9 is a flowchart showing control related to anti-fogging control (fifth embodiment).
FIG. 10 is a flowchart showing control related to anti-fogging control (sixth embodiment).
FIG. 11 is a flowchart showing control related to anti-fogging control (seventh embodiment).
[Explanation of symbols]
10 Air conditioner ECU (air conditioning control means)
52 Liquid crystal display (Blowout mode display means)
57 MODE selector switch (manual setting means)
60 AUTO switch (auto setting means)

Claims (5)

An air conditioner capable of adjusting the amount of air conditioned air blown into the vehicle window or the distribution ratio;
Manual setting means (57) for increasing the amount of air conditioned air blown to the window or the distribution ratio by the operation of the occupant;
Auto setting means (60) for automatically increasing the amount of air conditioned air blown to the window or the air distribution ratio;
In a vehicle air conditioner comprising air conditioning control means (10) for controlling the air conditioning equipment based on the setting in the manual setting means (57) or the auto setting means (60),
The air conditioning control means (10), the case based on the automatic setting means (60), as well as reducing the airflow volume or air distribution ratio of conditioned air to the window in comparison with the case based on the manual setting means (57) ,
It has a blowing mode display means (52) for indicating the outlet mode to the occupant,
When the air-conditioning control means (10) is in the air outlet mode for increasing the amount of air-conditioning air blown to the window or the air distribution ratio based on the auto setting means (60), the air-blowing mode display means (52 ) Displays a mode with a high air volume ratio to the passenger's feet . The air conditioning control means (10) cancels the air volume operation performed in the air outlet mode for increasing the air flow rate or the air distribution ratio of the air conditioned air to the window at the same time as the air outlet mode is released. The vehicle air conditioner according to claim 1 . When the air-conditioning control means (10) increases the amount of air-conditioning air blown to the window or the distribution ratio based on the auto setting means (60), the air-conditioning control means (10) depends on the environmental conditions affecting the fogging of the window. 2. The vehicle air conditioner according to claim 1 , wherein the amount of air blown into the window or the air distribution ratio is varied . The vehicle air conditioner has a function of controlling air conditioning of a plurality of air conditioning zones independently of each other,
The said air-conditioning control means (10) provided with the means to set the amount of blowing airflow or the distribution ratio of the air-conditioning wind to the said window for every said some air-conditioning zone , The vehicle use of Claim 1 characterized by the above-mentioned. Air conditioner. The air conditioning control means (10), said automatic setting means (60) when rather based, depending on the conditions of the occupant of the operation to shift to vent mode to increase the airflow volume or air distribution ratio of conditioned air to said window 2. The vehicle air conditioner according to claim 1 , further comprising a variable setting means (57) .

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