JP3149229B2 - Vehicle air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle, which controls the ratio of the amount of air supplied to the left and right sides of a vehicle compartment in accordance with the direction of solar radiation, and more particularly to an improved occupant feeling.

[0002]

2. Description of the Related Art Conventionally, as an air conditioner for a vehicle which controls the air distribution to the left and right in a vehicle compartment according to the azimuth and the amount of insolation, for example, JP-A-1-136812, JP-A-1-190520 and The one described in Japanese Patent Application No. 2-416242 is known.

In these vehicle air conditioners, the right and left air distribution ratio of a vent outlet is controlled in accordance with the solar radiation direction.
The left and right target airflows are calculated based on the left and right insolation amounts, and the total airflow and the air distribution ratio are determined. This is performed so that the blower airflow is low so that the airflow on the side not receiving the sunshine is not too small. When the air volume is reached, air conditioning control is performed such that the air volume is shifted up and the feeling is not degraded.

[0004]

However, in the above-mentioned conventional air conditioner, since air is blown at a shifted air volume, a problem occurs when the air volume is extremely high. That is, when the applied voltage of the blower blower is controlled to be higher, the airflow on the sunlit side is blown out of the permissible range on the feeling by the air distribution control, which is rather uncomfortable. I will. In addition, since the air flow varies depending on the blowing mode and the suction mode, for example, even if the air distribution is comfortable at a predetermined air volume in the bi-level (BI-L) mode, the vent (VENT) is used.
When the mode is set, the vented airflow increases, and the airflow on the sunlit side exceeds an allowable range, resulting in a problem that the feeling is deteriorated.

Accordingly, the present invention has been made to solve the above-mentioned drawbacks, and to provide an air conditioner for a vehicle capable of controlling air distribution to left and right seats within a range not exceeding a permissible range of the occupant's feeling. Aim.

[0006]

The vehicle air conditioner according to the present invention distributes the air distribution from the vent outlet to the left and right seats in a predetermined manner based on the detection directions of the solar radiation incident from the right and left sides of the vehicle. An air conditioner for a vehicle controlled by an automatic air conditioner according to a wind pattern, wherein when the air volume is equal to or greater than a predetermined value, a distribution of which the air distribution change is smaller than the air distribution pattern from among a plurality of preset air distribution patterns. In addition to selecting a wind pattern, the configuration is provided with a wind distribution pattern selecting means for selecting according to the blowing mode and the blowing mode.

[0007]

In the automatic air conditioner area, when a high air volume is selected, the air distribution pattern selecting means selects a distribution based on an air distribution pattern having a smaller air distribution change than the air distribution pattern corresponding to the high air volume. Since wind control is performed, appropriate air distribution to each seat on the left and right can be achieved while satisfying the passenger's high air volume demand, and air distribution exceeding the allowable range is avoided,
The feeling of the occupant is improved. Similarly, in the above-mentioned selection means, the air distribution control is performed by selecting from a plurality of air distribution patterns even when the suction mode or the blow mode is changed, so that the change in the air distribution amount due to these changes is prevented. The occupant's feeling can be improved. Above all
According to the present invention, the air distribution pattern
Irrespective of "injection mode" of inside and outside air
Set `` Blow mode only '' or, for example, vent mode
Set according to the “inlet mode” of inside and outside air in case of
Select “Blow-up mode and blow-in mode”
, So it is even more suitable in the cabin
It is possible to have a good air distribution.

[0008]

The vehicle air conditioner according to the present invention distributes the air distribution from the vent outlet to the left and right seats in a predetermined manner based on the detection directions of the solar radiation incident from the right and left sides of the vehicle. An air conditioner for a vehicle controlled by an automatic air conditioner according to a wind pattern, wherein when the air volume is equal to or greater than a predetermined value, a distribution of which the air distribution change is smaller than the air distribution pattern from among a plurality of preset air distribution patterns. In addition to selecting the wind pattern, only the blow mode and the blow mode
De and blow mode, a vehicle air conditioner which have a air distribution pattern selecting means for selecting according to any one of.

FIG. 1 shows a schematic configuration of an air conditioner 1 for a vehicle. The air conditioner 1 is composed of various devices provided in a duct 2 and a control unit 3. An intake door 6 for switching between an inside air inlet 4 and an outside air inlet 5 is provided at the most upstream side of the duct 2. In the duct 2, a blower 7, an evaporator 8, a mix door 9,
A heater core 10 is provided, and at the most downstream side of the duct 2,
Center vent outlets 11R and 11L having left and right outlets communicating with the vehicle compartment, left and right side vent outlets 12
R, 12L, defroster outlet 13, heat outlet 14
Is provided. These air outlets are opened and closed by being switched by switching doors 15, 16, 17 for mode switching. The left and right center vent outlets 11R, 11R
An air distribution door 18 for distributing the air flow to the left and right is provided upstream of the left and right side vent outlets 12R and 12L. Incidentally, reference numeral 19 denotes a bypass duct, and reference numeral 20 denotes a bypass door.

The evaporator 8 constitutes a cooler together with the compressor 21, the condenser 22, the receiver tank 23, and the expansion valve 24 for compressing and circulating the refrigerant.
Then, the compressor 21 is driven by the power of the engine, and the introduced air is cooled. Further, the engine cooling water flows through the heater core 10 to heat the air passing through the evaporator 8. The ratio of the air passing through the heater core 10 is set by the opening of the mix door 9. Each switching door 1 for switching the blowing mode
The vent outlet, the defroster outlet 13, and the heat outlet 14 are selected by 5, 16, and 17, and the conditioned air is sent into the vehicle interior.

The control unit 3 includes:
In addition to a sensor for detecting the degree of opening of the mix door 9, a vehicle interior temperature sensor 26, a ceiling sensor 27, an outside air temperature sensor 28,
A control panel 34 including switches such as a water temperature sensor 29, a duct sensor 30 for detecting an evaporator temperature, a solar radiation sensor 31 for detecting an amount of solar radiation, an air distribution lever 32, and a temperature up / down switch 33 is connected. 34
A signal is transmitted / received by a multiplexed signal between the two.

The solar radiation sensor 31 has left and right light receiving elements for detecting the amounts of solar radiation on the left and right sides of the vehicle, respectively, and the light receiving surfaces of these light receiving elements are arranged to the left or right of the vehicle. Then, the amount of solar radiation incident from the left and right directions of the vehicle is detected. Further, the control unit 3 has an I / O
The microcomputer includes a microcomputer having an O port, a CPU, a memory, and the like, an A / D converter for digitally converting each input signal, and a drive circuit for driving and controlling various devices. Then, a total signal is calculated based on the input data from each sensor, and the intake door 6, the bypass door 20, the compressor 21, the mix door 9, the mode doors 15, 16, 17 and the wind distribution door are calculated based on the control signals based on the total signal. The control of 18 is performed. In FIG. 1, 36, 37, 38,
Reference numerals 39 and 40 denote actuators for driving the respective doors. The microcomputer of the control unit 3 constitutes an air distribution pattern selecting unit.

Next, the air distribution control will be described. First, when the air conditioner is started, air conditioning control is started in accordance with a main routine (not shown), and each sensor and the control panel 34 are controlled.
Are read, and a total signal T for controlling the entire air conditioner is calculated. The control unit 3 controls the intake door 6, the blower 7, the compressor 21, the mix door 9, the bypass door 20, the mode doors 15, 16 and 1, based on the general signal T.
7 and control of the air distribution door 18 and the like.

In the air distribution control, as shown in FIG. 2, it is determined whether the air distribution lever 32 of the control panel 34 is at the left end or the right end (steps S1 and S2). Is fully fixed to the left side S3 or the air distribution door 18 is fully fixed to the right side (S4). In step S5, it is determined whether or not the blowing mode is the vent mode.
In step S6, it is determined whether the mode is the bi-level mode. If the mode is the bi-level mode, an air distribution automatic area indicated by hatching shown in FIG. 3 is calculated in step S7. If it is not bi-level in step S6, the air distribution door 18 is fixed at the center (S6).
8). In the above step S9, the temperature setting is MAX COO
L is determined, and if so, air distribution control based on the manual shown in FIG. 4 is performed in step S13. In step S10, it is determined whether or not it is in the air distribution automatic area. If it is not in the automatic area, in step S11,
By switching from auto air conditioner to manual,
Control for changing to the manual target value at a rate of 10% / 15 sec from the time of switching is performed, and in step S13, air distribution is controlled based on the air distribution manual shown in FIG. If it is in the air distribution automatic area in the above step S10, control is performed in step S12 to change the automatic air conditioner to the automatic target value at a rate of 10% / 15 sec by switching the automatic air conditioner. In step S14, the air distribution pattern is controlled. Is performed.

The air distribution pattern control is performed based on a subroutine (air distribution pattern control) shown in FIG. The air distribution pattern control is performed based on four preset air distribution patterns as shown in FIG. These air distribution patterns are based on the solar azimuth (left or right), suction mode, blower voltage, and blowout mode, and are distributed in the right and left air volume (%).
Is set as a pattern. For example, pattern A shows the case of the vent mode or the bi-level mode at a blower voltage of 8 V or less, and pattern B shows the case of the bi-level mode at a blower voltage of 8 V or more. Is set irrespective of. Pattern D is a case where the blower voltage is 8 V or more and the outside air is not introduced in the vent mode. Pattern C is a case where the blower voltage is 8 V or more and the outside air is introduced in the vent mode. As can be seen from these patterns A to D, when the solar azimuth is ± 30 ° to ± 70 ° and ± 70 ° or more, the air flow distribution% is set to be smaller as the patterns A to D become larger. In the air distribution pattern control, it is determined in step S141 whether the blower voltage is 8 V or more. If the blower voltage is less than 8 V, the air distribution control based on the pattern A is performed (S142).
If the voltage is 8 V or more, it is determined whether the mode is the vent mode in step S143. If the mode is not the vent mode, the air distribution control based on the pattern B is performed (S144). If the mode is the vent mode, it is determined in step S145 whether or not the outside air is introduced.
Is performed (S146). Step S
If the outside air is introduced at 145, control based on pattern C is performed (S147).

Therefore, in the automatic air conditioner region, even when a high air volume is manually selected, a wind distribution pattern having a smaller air volume than the air distribution pattern corresponding to the high air volume is selected, and the left and right air distribution control is performed. As a result, it is possible to satisfy the requirement of the occupant for a high air volume and to appropriately distribute air to the left and right seats. In addition, since an air distribution pattern corresponding to a change in the suction mode or the outlet mode is selected and the air distribution control is performed, appropriate air distribution in the vehicle compartment becomes possible.

[0017]

As described above, according to the present invention, even when a high air volume is manually selected, the air distribution pattern selecting means has a smaller air distribution change than the air distribution pattern corresponding to the high air volume. Since the air distribution control based on the air distribution pattern is performed, appropriate air distribution to each of the left and right seats can be performed while satisfying the occupant's high air volume requirement, and the air distribution exceeding the allowable range is avoided, and Feeling is improved. Similarly, in the above selection means, even when the suction mode or the blowing mode is changed, the air distribution control is performed by selecting from a plurality of air distribution patterns, so that the fluctuation of the air distribution amount due to these changes is prevented. The occupant's feeling can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a vehicle air conditioner according to an embodiment of the present invention.

FIG. 2 is a flowchart of air distribution control.

FIG. 3 is a diagram illustrating an air distribution automatic area.

FIG. 4 is a characteristic diagram showing air distribution manual control.

FIG. 5 is a flowchart of air distribution pattern control.

FIG. 6 is a characteristic diagram showing an air distribution pattern.

[Description of Signs] 1 Vehicle air conditioner 3 Air distribution pattern selection means (microcomputer) A to D Air distribution pattern 11R, 11L, 12R, 12L Vent outlet

Claims (1)

(57) [Claims] 1. A vehicle air conditioner for controlling air distribution from a vent outlet to left and right seats in accordance with a predetermined air distribution pattern by an automatic air conditioner based on a detection direction of solar radiation incident from a right side and a left side of the vehicle. When the air volume is equal to or greater than a predetermined value, a wind distribution pattern having a smaller wind distribution change than the wind distribution pattern is selected from a plurality of preset air distribution patterns, and blowing is performed.
Mode only, blow mode and blow mode
A vehicle air conditioner having air distribution pattern selection means for selecting the air distribution pattern according to any of the following .