JPH04356212A - Lateral wind apportionment conroller of air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To compensate direction of insolation without providing any special sensor for detecting insolation height by compensating right and left insolation signals using the maximum insolation height upon presuming the season from the outside air temperature. CONSTITUTION:An air blower 3 and a temperature regulating means 100 are arranged inside an air conditioner duct 2 of a vehicle air conditioner 1 and temperature-regulated air is blown out from each diffuser 4 to 6. A right and left wind apportionment door 7 to apportion wind to the right and left is provided on at least an upper diffuser 5 to accomplish wind apportionment in accordance with the polarization of the insolation quantity. The insolation direction is calculated by means of an insolation direction calculation means 120 based on the insolation signal after detecting the right and left insolation by means of a right and left insolation detecting means 110. The calculation value is then compensated upon presuming whether it is winter or summer from the outside air temperature by means of an insolation direction compensation means 130. Based on the compensated insolation direction, the wind apportionment door 7 is controlled by means of a wind apportionment door control means 140 and thus the right and left wind approtionment is controlled.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a left-right air distribution control device for a vehicle air conditioner that detects polarized solar radiation and distributes air to the left and right.

0002

[Prior Art] A conventional left and right air distribution control device is
As shown in No. 136812, left and right solar radiation is detected by left and right solar radiation sensors installed on the instrument panel, a solar radiation direction is derived from the deviation of the solar radiation signals output from the left and right solar radiation sensors, and the solar radiation direction is determined based on this solar radiation direction. It was to control the wind door.

[0003] In addition, in order to accurately calculate the solar radiation direction,
It is also known to provide an upper solar radiation sensor in addition to the left and right solar radiation sensors to determine the solar radiation altitude.

0004

[Problem to be solved by the invention] However, the above-mentioned Unexamined Patent Publication No. 1
In No. 136812, the characteristics of the left and right solar radiation sensors change depending on the solar radiation altitude, so there is a problem that errors occur in the control of the ventilation doors, which interferes with the air conditioning feeling due to the left and right wind distribution. Additionally, adding an upper solar radiation sensor for solar radiation height complicates the configuration of the device for detecting solar radiation signals, resulting in an increase in cost.

[0005] Therefore, the present invention uses left and right solar radiation signals from the left and right solar radiation detection devices for detecting the left and right solar radiation amounts, and the temperature outside the vehicle detected to calculate the total signal of the air conditioner, to determine the solar radiation direction. An object of the present invention is to provide a left-right air distribution control device for a vehicle air conditioner that corrects the above and suppresses an increase in cost.

[0006]

[Means for Solving the Problems] The present invention will be explained with reference to FIG. 1. The air conditioning duct 2 has a blower 3 and a temperature control means 100, and the air conditioning duct 2 has a temperature control means 100 at its lowest downstream. Left and right air distribution doors 7 are provided at least at the upper air outlet 5 of these air outlets 4, 5, and 6 to blow out air whose temperature is controlled by the air outlet 100. The vehicle air conditioner 1 includes at least left and right solar radiation detection means 110 that detects left and right solar radiation, and solar radiation direction calculation means 120 that calculates a solar radiation direction based on left and right solar radiation signals output from the left and right solar radiation detection means 110.
, a solar radiation azimuth correction means 130 that corrects the calculated solar radiation azimuth according to the outside air temperature, and this solar radiation azimuth correction means 1
The present invention further includes a ventilation door control means 140 for controlling the ventilation door 7 in accordance with the solar radiation direction corrected by the solar radiation direction corrected by the ventilation direction.

[0007]

[Operation] Therefore, in this invention, the maximum solar radiation altitude of the season estimated from the outside air temperature is assumed, and the left and right solar radiation signals are corrected by this virtual solar radiation altitude to calculate the solar radiation direction, and the left and right wind roses are calculated. The above issues can be achieved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings.

In FIG. 2, the vehicle air conditioner 1 has an inside air inlet 8 and an outside air inlet 9 on the most upstream side of the air conditioning duct 2. It has a switching door 10.

A blower 3 is provided downstream of the inside/outside air switching door 10, and a temperature control means 10 is provided downstream of the blower 3.
0 is set.

[0011] This temperature control means 100 includes a compressor 11
, a condenser 12, and an evaporator 14 that constitute a cooling cycle together with an expansion valve 13; a heater core 16 whose flow rate of hot water is adjusted by a solenoid valve 15;
The heater core 16 is provided with an air mix door 17 provided upstream of the heater core 16 to limit the amount of air passing through the heater core 16.

[0012] At the lowest downstream of the air conditioning duct 2, a mode door 1 is installed.
A differential air outlet 4, an upper air outlet (vent air outlet) 5, and a lower air outlet (foot air outlet) 6 are provided, which are opened and closed as appropriate by the upper air outlet 5. A vent duct 23 is attached to connect the right outlet 19, the center right outlet 20, the center left outlet 21, and the left outlet 22 to be opened, and a connecting portion 24 between the upper outlet 5 and the vent duct 23 is provided with a A wind door 7 is provided.

In the vehicle air conditioner 1 having this configuration, the inside air or outside air selected by the inside/outside air switching door 10 is
Air is blown downstream of the air conditioning duct 2 by the blower 3 .

[0014] This air sent into the evaporator 1
The air is cooled by passing through the heater core 16 , and the air is selected between the air passing through the heater core 16 and the bypassing air depending on the opening degree of the air mix door 17 . The air that has passed through the heater core 16 and is heated and the air that has bypassed the heater core 16 and remains cooled are mixed on the downstream side of the heater core 16 to become air whose temperature is controlled to a desired temperature. .

This temperature-controlled air is blown into the vehicle interior through the air outlets 4, 5, and 6 selected by the mode door 18, thereby regulating the temperature of the vehicle interior.

In addition, when polarized solar radiation is detected and a left and right wind grate is required, by moving the wind grate door provided at the connection part 24 between the upper air outlet 5 and the vent duct 23 to the left or right, the right or left side can be installed. The amount of air can be increased.

A microcomputer 25 is provided to control the vehicle air conditioner 1. This microcomputer 25 includes a central processing unit (not shown).
It consists of a CPU), a read-only memory (ROM), a random access memory (RAM), an input/output port (I/O), etc., and is well known in itself.

The microcomputer 25 includes at least a vehicle interior temperature sensor 26 that detects the vehicle interior temperature, a vehicle exterior temperature detection sensor 27 that detects the vehicle exterior temperature, and a right solar radiation sensor 28 and a left solar radiation sensor 29 that detect the amount of solar radiation on the left and right sides.
The signal from the multiplexer (MPX) 30 and A/D
The signal is input via the converter 31, and the signal from the operation panel 32 described below is input and the processing is executed.

The left and right solar radiation detection devices 51 are shown in FIGS.
As shown in b), a front inclined stand 49 inclined forward at a predetermined angle is attached near the windshield 52 and near the center on the instrument panel 48, and a front inclined stand 49 is further attached on this forward inclined stand 49. It is constituted by a left and right tilting table 50 having sloped surfaces 50a and 50b tilted at a predetermined angle left and right, and a right solar radiation sensor 28 and a left solar radiation sensor 29 attached to the left and right sloped surfaces 50a and 50b of the left and right tilting table 50. ing.

The operation panel 32 includes an AUTO switch 33 for automatically controlling the operation of the air conditioner 1;
an OFF switch 34 that stops the operation of the intake air mode, an outside air introduction switch 35 that manually sets the intake air mode to the outside air introduction mode, an inside air circulation switch 36 that manually sets the intake air mode to the inside air circulation mode, and a manual setting of the defrost mode. A differential switch 37, a temperature setting device 38 that sets the temperature inside the vehicle, an A/C switch 39 that manually turns on and off the cooling cycle, a MODE switch 40 that manually switches the blowing mode, a fan switch 41 that sets the air volume of the blower 3, Also provided are a wind rose slide switch 42 for manually adjusting the left and right wind roses, and a display section 44 that displays the current setting status and is controlled by the microcomputer 25 via a display circuit 43.

The microcomputer 25 controls the inside/outside air switching door 10 by controlling the actuator 46a through the output circuit 45a, the blower 3 through the output circuit 45b, and the electromagnetic clutch 4 through the output circuit 45c.
7, the air mix door 17 is controlled by controlling the actuator 46b via the output circuit 45d, and the air mix door 17 is controlled via the output circuit 45d.
The heater core 16 is controlled by controlling the electromagnetic pump 15 via the output circuit 5e, the mode door 18 is controlled by controlling the actuator 46c via the output circuit 45f, and the actuator 46d is controlled via the output circuit 45g. It controls the wind door 7.

The left and right air distribution control executed by the microcomputer 25 is executed according to the flowchart shown in FIG.

[0023] Hereinafter, the process will be explained according to this flowchart.

This flow chart starts from step 200. In step 210, the right solar radiation signal IR from the right solar radiation sensor 28, the left solar radiation sensor IL from the left solar radiation sensor, and the outside air temperature signal TA are read as data.

In step 220, an arithmetic constant K1 used in steps 250 and 270 described below is determined.
The value of is set by the outside temperature signal. In the conversion graph of solar radiation deviation SD and solar radiation direction α shown in Figure 5, when the outside temperature is 5°C or lower, K1 is set so that the slope of the conversion graph increases assuming winter, and the conversion to solar radiation direction is performed. If the outside temperature is 30℃ or higher, set K1 so that the slope of the conversion graph becomes smaller, assuming summer, and increase the conversion rate to the solar radiation direction (graph B). Make it.

[0026] This makes corrections based on the low solar radiation altitude in winter and the high solar radiation altitude in summer.

In step 230, the magnitudes of the right solar radiation signal IR and the left solar radiation signal IL are compared, and if the right solar radiation signal IR is large, the process proceeds to step 240, and if the left solar radiation signal IL is large, the process proceeds to step 240. 2
60.

If it is determined in step 230 that the right solar radiation signal is large, in step 240,
In step 250, the right side solar radiation deviation SD is calculated by the formula shown in step 240 in FIG. It is.

If it is determined in step 230 that the left side solar radiation signal is large, then in step 260 the left side solar radiation deviation is calculated using the formula shown in step 260 in FIG. 4, and in step 270 this left side solar radiation deviation SD is The calculation constant K1 set in step 220 is multiplied, and a minus sign indicating the left solar direction is added to obtain the left solar direction α.

Based on the solar radiation direction α calculated in step 250 or step 270, step 280
As shown in FIG. 6, the ventilation door 7 is controlled to increase the amount of air on the sunlight side and to decrease the amount of air on the shaded side.

[0031]

Effects of the Invention As explained above, according to the present invention, the solar radiation altitude is virtualized based on the outside air temperature signal from the outside air detection sensor that has already been installed. The direction can be corrected, making it possible to create appropriate left and right wind roses, and at the same time suppressing increases in cost.

[Brief explanation of drawings]

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

FIG. 2 is an explanatory diagram of an air conditioner according to an embodiment of the invention.

FIG. 3 is an explanatory diagram of left and right solar radiation detection devices.

FIG. 4 is a flowchart diagram executed by a microcomputer.

FIG. 5 is a conversion graph diagram of solar radiation deviation SD and solar radiation direction α.

FIG. 6 is a graph showing the relationship between the wind volume on the driver side and the passenger seat side depending on the solar radiation direction α and the opening degree of the ventilation door.

[Explanation of symbols]

1 Vehicle air conditioning system 2 Air conditioning duct 3. Blower 4. Differential air outlet 5 Upper air outlet 6 Lower air outlet 7. Air distribution door 100 Temperature control means

Claims (1)

[Claims] 1. An air conditioning duct has a blower and a temperature control means, and furthermore, the air conditioning duct has an outlet at the most downstream position for blowing out air whose temperature has been controlled by the temperature control means, and at least one of the air outlet In a vehicle air conditioner having left and right air distribution doors that are provided at the upper air outlet and provide left and right air distribution, there are left and right solar radiation detection means for detecting at least left and right solar radiation, and left and right solar radiation detection means output from the left and right solar radiation detection means. A solar radiation direction calculation means that calculates a solar radiation direction based on a solar radiation signal, a solar radiation direction correction means that corrects the calculated solar radiation direction based on the outside temperature, and a ventilation door is controlled according to the solar radiation direction corrected by the solar radiation direction correction means. What is claimed is: 1. A left and right air distribution control device for a vehicle air conditioner, comprising: