JPH0194015A - Air conditioner for automobile - Google Patents

Abstract

PURPOSE:To improve comfortableness by enlarging the quantity of correction by solar radiation, and lowering the temperature in blow-out at the time of vent mode and high level mode much more than those at heat mode. CONSTITUTION:Output signals from a solar radiation sensor 4 is inputted into a solar radiation correction operating section 21 through an analog input section 5. The detected mode is simultaneously inputted from a mode detecting device 20. And when both vent mode and high level mode are detected by the mode detecting device 20, a large quantity of solar radiation correction temperature is set up against the detected quantity of solar radiation so as to be inputted into an operating section 6. The operating section 6 makes the correction of solar correction temperature against both the basic blow-out temperature and the corrective blow-out temperature obtained based on specified procedures so as to set blow-out temperature to be lower than that for heat mode for controlling each control section 12-14. Owing to this constitution, optimum correction against solar radiation is made wherever an air outlet port may be, thereby improving comfortableness.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an air conditioner for an automobile.

Conventional technology In recent years, information from various sensors installed inside and outside the vehicle interior has been used to automatically control the rotation speed of the mix damper and blower motor, which adjust the air temperature inside the vehicle interior, reducing the frequency of operations by the driver. , air conditioning control has been implemented to improve safety and comfort.

Conventional air conditioners for automobiles of this type are, for example,
There is one as shown in Japanese Patent No.-8327.

FIG. 6 is a block diagram of the configuration of a conventional automobile air conditioner. Inside air sensor 1, outside air sensor 2, temperature setting device 3
Analog signals from various sensors such as the solar radiation sensor 4 are input to an analog signal input section 5. The analog signal input section 5 converts the analog signal selected by the selection signal from the calculation section 6 into a digital signal and outputs the digital signal to the calculation section 6. In addition, digital signals from an A/C switch 7, a fan switch 8, etc. are also input to the calculation unit 6. Based on this information, the calculation unit 6 determines the opening degree of the mix damper 9, the voltage of the blower motor 10, and the ON/OFF state of the compressor 11.
Comfortable air conditioning is achieved by calculating the FF and outputting the calculated values to the mix damper drive section 12, blower motor control section 13, and compressor drive section 14.

FIG. 7 is a flowchart of the control of the calculation section 6. First, analog signals such as inside air sensor 1 and outside air sensor 2 and A
Digital signals such as /C switch 7 and fan switch 8 are input. In step 30, a basic blowout temperature is calculated from the outside air temperature.

FIG. 4 is a basic blowout temperature characteristic diagram. The basic blowout temperature is the blowout temperature required to maintain the inside air temperature at the same temperature as the set temperature. In step 31, a corrected blowout temperature is determined from the difference between the set temperature and the inside air temperature.

FIG. 5 is a corrected blowout temperature characteristic diagram. This corrects the blowout temperature to bring the inside air temperature to the set temperature; if the inside air temperature is higher than the set temperature, the blowout temperature is lowered, and if the inside air temperature is lower than the set temperature, the blowout temperature is increased. In step 32, the blowing temperature is corrected based on solar radiation.

FIG. 8 is a solar radiation correction temperature characteristic diagram. In step 33, the basic blowing temperature, the corrected blowing temperature, and the solar radiation correction temperature are added to obtain the blowing temperature.

For example, if the set temperature is 25°C, the outside temperature is 20°C, the inside temperature is 30'C1, and the solar radiation is 500 kca I/771"
・Assume that it is h. First, from Figure 4, the set temperature is 25°.
Since the internal air temperature is 20°C at C, the basic blowing temperature is 30°C. Since the set temperature is 25°C and the inside temperature is 30'C (
The set temperature - inside air temperature) is -5°C, and from FIG. 5, the corrected blowout temperature is -10°C. The amount of solar radiation is 500kcal/
Since the temperature is i-h, the solar radiation correction temperature is -10°C from FIG. Therefore, the blowing temperature is 30'C+(-10'C)+
(-10°C)=10'C.

In step 34, the opening degree of the mix damper 9 and the blowing air volume of the blower motor 10 necessary to obtain the calculated blowing temperature are calculated. In step 35, a signal for driving the mix damper 9 is output to the mix damper drive unit 12 in order to achieve the calculated mix damper opening degree. Thereafter, voltage control of the blower motor 1o and control of the compressor 11 are performed.

FIG. 9 is a configuration diagram of the air outlet switching device. The air outlet driving unit 15 drives the mode damper 17 to switch to the air outlet set by the air outlet setting device 16, and the vent air outlet 1
8. Heat is blown into the vehicle interior from the heat outlet 19. When the bi-level mode is set, air is blown out from both the vent outlet 18 and the heat outlet 19.

Problems to be Solved by the Invention However, in the above configuration, if the amount of solar radiation is the same no matter where the air outlet is located, the amount of solar radiation correction is the same.

Normally, when there is sunlight, the temperature in the upper part of the vehicle interior increases, but the temperature at the feet does not rise as much. When the air outlet is in heat mode, blowing air from the feet, even if the temperature of the air is lowered by solar radiation correction, only the temperature at the feet will drop, but the temperature at the head will not, which gives a very bad feeling. If you match the feeling with heat mode, vent mode that blows out from the top,
When in bi-level mode, the feeling of cold air is insufficient and the feeling is poor.

SUMMARY OF THE INVENTION Therefore, the present invention provides an air conditioner for an automobile that performs optimal correction for solar radiation no matter where the air outlet is located and provides comfortable air conditioning.

Means for Solving the Problems In order to solve the above-mentioned problems, the automotive air conditioner of the present invention has three modes: a vent mode that blows air from the top into the vehicle interior, a bilevel mode that blows air from the top and from the feet, and a bilevel mode that blows air from the feet. An air outlet setting device that sets the air outlet to heat mode, an air outlet switching device that switches to the air outlet set by the air outlet setting device, and detects whether the air outlet is in vent mode or bilevel mode in which air is blown from the upper part of the air outlet. a mode detection device, a mix damper that adjusts the temperature of air blown into the vehicle interior, a blower motor that blows air into the vehicle interior, a temperature setting device that sets a desired vehicle interior temperature, a solar radiation sensor that detects the amount of solar radiation, and a solar radiation sensor that detects the amount of solar radiation. a solar radiation correction amount calculation unit that increases a correction amount in proportion to the amount of solar radiation detected by the sensor when the air outlet detected by the mode detection device is in a vent mode or a bi-level mode; a calculation section that calculates a blowout temperature and a blowout air volume based on information such as the set temperature, outside air temperature, and inside air humidity, and the solar radiation correction amount determined by the solar radiation correction amount calculation means, and the output of the calculation section; The apparatus is equipped with a control device for controlling the mix damper and the blower motor.

Effect of the present invention With the above-described configuration, the mode detection device detects whether the air outlet is in the vent mode or bilevel mode in which air blows from the top, and the amount of solar radiation correction is made larger than in the heat mode to reduce the Suita temperature. By lowering the temperature, optimal compensation for solar radiation can be made no matter where the air outlet is located.
Comfortable air conditioning can be achieved. .

Embodiment Hereinafter, an automotive air conditioner according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of the configuration of an automobile air conditioner showing an embodiment of the present invention, and the same parts as in FIG. 6 are given the same symbols and the explanation thereof will be omitted.

The part in Fig. 1 that differs from Fig. 6 is the analog input section 5.
The output and the mode detection device 20 are input to the solar radiation correction amount calculation section 21, and the output is output to the calculation section 6.

FIG. 2 is a flowchart of the control of the solar radiation correction amount calculation section 21.

In step 40, the amount of solar radiation is input from the analog signal input section 5. In step 41, depending on the output of the mode device 20, if the air outlet is in the vent mode or bilevel mode in which air is blown from the vent outlet 18, the process proceeds to step 42; otherwise, the process proceeds to step 43.

FIG. 3 is an output characteristic diagram of the solar radiation correction amount calculation section 21.

In step 42, the solar radiation corrected temperature is determined from the characteristic curve 50 in FIG.

The calculation unit 6 calculates the air outlet temperature by adding the basic air outlet temperature obtained from FIG. 4, the corrected air outlet temperature obtained from FIG. 5, and the solar radiation correction temperature obtained from FIG. 3.

For example, assume that the set temperature is 25° C., the outside temperature is 20° C., the inside temperature is 30° C., and the solar radiation is 500 kcm+/i·h. First, from Figure 4, the set temperature is 25℃ and the inside air temperature is 2.
Since the temperature is 0°C, the basic blowing temperature is 30°C. Since the set temperature is 25°C and the inside air temperature is 30'C, (set temperature - inside air temperature) is -5°C, and from Figure 5, the corrected blowout temperature is -10°C.
It is ℃. If the mode detection device 20 is set to the vent mode in which the air outlet blows air from the vent outlet 18, or the bilevel mode, the amount of solar radiation is 500 kcal/111-h, so from the characteristic curve 50 in FIG. 3, the solar radiation correction temperature is -15°.
It is C.

Therefore, the blowing temperature is 30°C + (-10°C) + (-15°C) = 5°C.

If the blowing temperature is in the heat mode under the same conditions, the solar radiation correction temperature is -5° C. from the characteristic curve 51 in FIG. Therefore, the blowing temperature is 30°C+(-10°C)+(-5°C)=15°C.

In this way, even if the amount of solar radiation is the same, the blowout temperature is lower in the vent mode or bilevel mode where the blower outlet blows air from the vent outlet 18 than in the heat mode.

Effects of the Invention As described above, the present invention includes a mode detection device that detects whether the wind is in the vent mode or bilevel mode in which the air blows from the upper part of the air outlet, and a control device that detects the amount of solar radiation that is proportional to the amount of solar radiation detected by the solar radiation sensor. If the air outlet detected by the mode detection means is in vent mode or bi-level mode, a solar radiation correction amount calculation unit is provided that increases the correction amount, so that even if the amount of solar radiation is the same, wind is not flowing from the upper part of the air outlet. In the vent mode and bilevel mode, the amount of solar radiation correction is increased and the temperature of the air outlet is lowered, so that no matter where the air outlet is located, appropriate correction for solar radiation can be made and comfortable air conditioning can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an automotive air conditioner according to an embodiment of the present invention, FIG. 2 is a flowchart of the control of the solar radiation correction amount calculation section, and FIG. 3 is the output characteristics of the solar radiation correction amount calculation section. 4 is a basic outlet temperature characteristic diagram, FIG. 5 is a corrected outlet temperature characteristic diagram, and FIG. 6 is a diagram showing the configuration of a conventional automobile air conditioner.Inside air sensor, 2... ...
Outside air sensor, 3...Temperature setting device, 4...
...Solar radiation sensor, 5...Analog signal input section,
6... Arithmetic unit, 7... A/C switch, 8... Fan switch, 9... Mix damper, 10... Blower motor , 11...
... Compressor, 12 ... Mix damper drive section, 13 ... Blower motor control section, 14
...... Compressor drive unit, 15... Outlet drive unit, 16... Outlet setting device, 17.
...Mode diameter, 18...Vent outlet, 19...Heat outlet, 2o...
Mode detection device, 21... Single shot correction amount calculation unit. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure control wave! Fig. 3 500 l000 solar radiation t (KrJ/m'h) i, J21,, 5 Fig. 'F q;X
/X Ccノ;? Constant temperature s-n Temperature no r(''c) Bay 6 Figure 7 Mouth Figure 8 7 Huu-thousand-dodanha 0

Claims (1)

[Claims] Vent mode that blows air from the top into the vehicle interior.
An air outlet setting device that sets a bi-level mode where air blows from the top and the feet, and a heat mode where air blows from the feet, an air outlet switching device that switches to the air outlet set by the air outlet setting device, and air that blows out from the top of the air outlet. A mode detection device that detects whether the vehicle is in vent mode or bi-level mode, a mix damper that adjusts the temperature of air blown into the vehicle interior, a blower motor that blows air into the vehicle interior, and a temperature setting device that sets the desired vehicle interior temperature. , a solar radiation sensor that detects the amount of solar radiation; and in proportion to the amount of solar radiation detected by the solar radiation sensor, if the air outlet detected by the mode detection device is in a vent mode or a bi-level mode, a correction amount is increased. A solar radiation correction amount calculating section calculates a blowout temperature and a blowing air volume based on the set temperature set by the temperature setting means, information such as outside air temperature and indoor air humidity, and the solar radiation correction amount calculated by the solar radiation correction amount calculating section. An air conditioner for an automobile, comprising a control device that has a calculation section and controls the mix damper and the blower motor based on the output of the calculation section.