JPS5945210A - Air condition controller for car - Google Patents

Abstract

PURPOSE:To perform comfortable control of air-conditioning by sensing the temperature conditions at the head side and foot side of passenger independently to eliminate the difference of temperature from the target temperature existing locally through control of operation of a fan. CONSTITUTION:The outputs from an outer air temperature sensor 17 and a sun shine sensor 18 after A/D conversion 19 are fed together with a signal from a room temperature setting section 27 to a target room temperature arithmetic circuit 21 to determine the target room temperatures at the head side and foot side in the cabin. Said target room temperature are A/D converted 19 and fed to a room temperature difference arithmetic circuit 22 together with the outputs from the head and foot side room temperature sensors 15, 16 to operate the temperature difference against the head side and foot side target room temperatures. In accordance to said temperature difference, the opening of a cool and warm air mixing door is determined at the arithmetic circuit 23 to control each door opening adjusting actuators 13, 14. In accordance to said temperature difference, an inner/output air exchange door actuator 11 and a flow control actuator 12 are controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention makes full use of an automobile air conditioning control system, particularly a microcomputer, to control the temperature of the ceiling side of the vehicle, that is, the head temperature of the passenger (hereinafter referred to as the head room temperature), and the temperature of the floor side, that is, the foot temperature (
Hereinafter referred to as head room temperature. ) relates to a control installation for an automobile that controls a blower fan so that both of the above are achieved at a calculated target room temperature.

In recent years, air conditioning control systems for automobiles have become fully automated with the introduction of Mitaro computers, and air conditioning control inputs include, for example, a room temperature setting section, an outside temperature sensor, an IEI radiation sensor, a head room temperature sensor, and a foot room temperature sensor. The output is used] and the control input is used to execute various calculations to control the air conditioning system.

By the way, temperature control in conventional air conditioning control devices has generally been performed using the following method. That is, the microcomputer calculates the target temperature in the ILT from each output of the room temperature setting section, the outside temperature sensor, and the solar radiation sensor.
By comparing the head room temperature and foot room temperature inside the car detected by the head room temperature sensor and the foot room room temperature sensor with the target room temperature, the opening degree of the cold/hot air mixing door is determined and the head room temperature and foot room temperature inside the car are determined. In addition to blowing air at an appropriate temperature to the room side, the air volume is determined based on the deviation of the average head room temperature and foot room temperature in the city from the target room temperature. It had been decided. In other words, when the deviation is large, the fan is rotated at a high speed, and when it is small, the fan is rotated at a low speed, thereby ensuring the necessary air volume for air conditioning while reducing noise and saving energy.

However, in such a method of controlling the amount of air blown out, the amount of air blown out is determined solely by how much deviation the average value of the head room temperature and the foot room temperature inside the car is in line with the target room temperature. Therefore, if the temperature deviation from the target room temperature is extremely large at either the head side or the feet side of the occupant, sufficient airflow will be supplied to eliminate the large temperature deviation. As a result, local temperature deviations were difficult to resolve and passengers often complained of discomfort. In particular, even though the average value of the head room temperature and the foot room temperature is approximately equal to the target room temperature, it is assumed that the temperature deviation has become 0, and the blowout air volume is controlled to a constant state. This is very inconvenient because it causes

This invention was made to solve these conventional problems, and it detects both the temperature state of the head side and the temperature state of the foot part side when placed horizontally, and detects the temperature locally. l) The purpose is to control the temperature of the entire city by operating the ventilation fan so as to eliminate the temperature deviation from the target temperature. In order to achieve this object, the present invention has developed an air conditioner that is located on the side of the rice bowl inside the car and in accordance with the legal system, and is located on the air outlet L1 or the pillar that blows air that is independently controlled by a common blower fan. A control device, comprising a ceiling side temperature sensor and a body side temperature sensor for detecting each of the above-mentioned sword side and legal room temperatures, and a ceiling side target temperature calculation circuit and a legal example for calculating each target temperature of the ceiling side room temperature and the legal example room temperature. Temperature difference calculation which has a target temperature calculation circuit and calculates a first temperature difference between the ceiling side room temperature and the ceiling side target temperature and a second temperature difference between the standard room temperature and the legal target temperature, respectively. The configuration includes a comparison circuit that compares the magnitude of the first temperature difference and the second temperature difference to determine the rotational speed of the blower fan.

The present invention will be explained below based on the drawings.

1 to 7 illustrate one embodiment of the present invention, and in FIG. 9, reference numeral 1 is the compartment of the white motion table;
1 to this vehicle compartment 1 (2 to the ventilation duct 1 that constitutes the indoor air conditioning system)
One end of this ventilation duct 2, the inside/outside air intake [2A], is connected to the outside Q or inside R of the vehicle.
An internal/external air switching door 3 is provided for switching the intake of air from the inside to the outside.

The interior side R of the vehicle interior and the communication hole S provided in the vehicle interior L are communicated with each other through a pipe or the like. Further, in the ventilation duct 1-2, ventilation fans 4 are provided at predetermined intervals on the passenger compartment side, that is, on the leeward side of the inside/outside air switching door 3, and furthermore, ventilation fans 4 are provided on the leeward side of the ventilation fans 4 at predetermined intervals. An evaporator 5 is provided. A heater core 6 is provided at the other end of the ventilation duct 1-2 at a portion facing the vehicle interior 1.

The ventilation duct 1-2 has a structure in which the blowing air is branched on the leeward side of the heater core 6, and the branched blowing air is sent to the head-side blow-off lower and the foot-side blow-off outlet 8'h) p) passenger compartment 1 It is designed to be blown out. In addition, the heater core [3
There are cold and hot air mixing doors 9 and 10 installed nearby, and opening and closing of these doors changes the amount of air passing through the heater core 6. The airflow rate can be controlled. In addition, the inside/outside air switching door 3 has, for example, negative pressure! Drive type internal and external air 1) Can be opened and closed freely by actuator 11 for replacement door,
The air blowing fan 4 can freely control the amount of air blown, that is, the rotational speed of the blowing fan, by an actuator 12 for controlling the air blower 1, which is constituted by an electric circuit. In addition, the cold/warm air mixing door 9
10 can be opened and closed by negative pressure drive type actuators 13 and 14 for adjusting the opening.

Furthermore, the vehicle interior 1 is equipped with a head room temperature sensor 15 that detects the room temperature on the head side and a foot room temperature sensor 16 that detects the room temperature on the foot section side. The temperature sensor 17 has been removed, and the solar radiation sensor 18 is installed on the upper pad of the vehicle body, for example, to obtain an output according to the temperature of the interior of the vehicle. installed. Each of these sensors 15.16.1.7.1.8 is analog-digital (A
-D) It is connected to the converter 19, so that signal processing can be easily performed by the microcomputer 20 through this Jt. Further, a room temperature setting section 21 that generates a digital signal for setting the room temperature in the vehicle interior to a desired temperature is connected to the microcomputer 20 and displayed on a set room temperature display section 22 .

In addition, the above-mentioned internal/external air IJJ exchange 1-A actuator 11, air flow rate control actuator 12. The opening adjustment actuators 13 and 14 are controlled by the microcomputer 20 according to a predetermined air conditioning program for calculation processing.

Furthermore, the microcomputer 20 has the following configuration. That is, it passes through the Δ-Y) converter 19,
The multiple outputs of the outside temperature sensor 17 and the radiation sensor 18 are sent to the 11-standard room temperature calculation circuit 2 together with the signal from the room temperature setting section 27.
1, this arithmetic circuit 2
In step 1, each target room temperature for the head side and the foot side of the middle white is determined. The output of this [1-mark room performance initial circuit 21] is supplied to the indoor temperature difference calculation circuit 22 together with the outputs of the head room temperature sensor 15 and the feet room temperature sensor 16 that have passed through the Δ-D converter 19, , each on the head side and foot side]
The temperature deviation from the standard room temperature is calculated. Furthermore, the output of the door 1 standard degree calculation circuit 23. Drive circuit 24
, and 4L supplied to the comparison circuit 25.

1-'7'1-1 The opening calculation circuit 23 calculates the cold/warm air mixture 1- which determines the vorticity of the air blowing toward the head side and the foot area inside the vehicle.
The opening degree of door opening 9.10 is calculated, and its output is sent to the door opening adjustment controller 7' via drive circuit 26.
1/1. In addition, the drive circuit 24 performs calculations related to the control of the inside/outside air switching door 3, and the output thereof is for the inside/outside air switching 1 to 1 and the actuator 1.
1 to 0 (is supplied. Ratio 1 bite circuit 25 compares the temperature deviations from each target room temperature at the head side and foot room side of the car, and air blowing is performed based on the larger one. The fan rotation speed is calculated by the drive circuit 28, and its output is supplied to the actuator I2 for controlling the amount of air blown.

Next, the operation of the air conditioning control device will be explained according to flowcharts 1 to 1 shown in FIGS. 3 and 4.

When an air conditioning control switch (not shown) is turned on and the microcomputer 20 is powered on while driving a car, the air conditioning control program executes arithmetic processing from step 30 of star 1-. Next, the process moves to the initial setting routine 31, and the register circuit of the macrocomputer 20,
The counter circuit, latch circuit, etc. are set to an initial state necessary for execution of arithmetic processing, and preparations for reading input data from the head room temperature sensor 15 and the like are completed. After this initial state is set, the process moves to various air conditioning control calculation routines 32. Note that the various air conditioning control calculation routines 32 are repeated at predetermined intervals.

Details of the various air conditioning control calculation routines 32 are shown in FIG.
The outputs of the foot room temperature sensor 16, the outside temperature sensor 17, and the solar radiation sensor 18 as well as the signals from the room temperature setting unit 27 are respectively A-1) the amount digitized via the converter 19, that is, the head room temperature Ti1. Room temperature at feet 1' i =
, outside air temperature 1" o, 1" radiation amount 2, and set room temperature Ts are inputted and temporarily stored (11) Next, the process proceeds to step 41, where the head "14" XA room temperature inside the car is determined from the input data. Ji +
The desired foot room temperature oi2 is calculated by 1 degree (where ', +, , 2, Kp and KJ are constants). Further, the process proceeds to step 42, where the head temperature deviation Δgo 11 and the foot temperature surface difference ΔT i are calculated by the indoor temperature difference calculation circuit 22 according to the relationship of the following equation.

After that, the inside/outside air switching door control calculation routine/I3 and 1
(The process moves to the air blowing amount control calculation routine 45 via the target opening degree calculation routine 44.
This is a routine that performs calculations to determine one scale of lI11-A3. Further, the door target opening degree calculation routine 44 is a routine for determining the opening degree of the cooling/heating air doors 9, 10 performed by the door [1 drift opening degree calculation circuit 23, and the maximum cooling position of the cooling/heating air doors 9, 10. The opening degrees α1 and α42 are set according to the relationships shown in FIGS. 5 and 6, respectively. That is, the opening degree α1 is ΔTj+≦02 (for example, -10°C)
When 0 (maximum cooling position), Δ”rj1≧IElt°
(for example, lOoC), the maximum opening degree is set to lIJ. Further, when 0<ΔTi1I<et, the opening degree is set to an intermediate degree according to the temperature difference. That is, if such a function is expressed by gl, then α1=gt (ΔTit) is set. Similarly, the opening degree α2 is ΔT j 2≦04 (for example, −1O°
C), at O (maximum cooling position), Δ1”12≧0: ]
(For example, when the temperature is 110°C, the maximum opening degree is set to "f213."

Set the intermediate opening according to the In other words, instead of expressing such a function as gl, the deviation is set to α==g 2 (ΔT, i, , z).

The ventilation flea control calculation routine 45 is a routine for determining the rotational speed of the ventilation fan 4. In this routine 45, the process first proceeds to judgment 46, where it is determined whether the condition 1ΔT111≧1ΔT121 is satisfied. If the result of this determination is YES, in step 47, the reference room temperature '1'3 and the reference target room temperature O are set as follows to determine the fan rotation speed based on the head side of the vehicle interior. Set to .

If the result of the determination is negative, the reference room temperature TR and base room temperature TR and reference room temperature TR are determined as follows in order to determine the rotation speed of the ventilation fan based on the foot side of the vehicle interior in step 48. Set to .

After completing the second setting or comparison circuit 25, process 49
Then, the drive circuit 28 sets the rotational speed of the blower fan to the seventh speed.
Set according to the relationship shown in the figure. That is, the reference room temperature T&
and the standard target room temperature 0, and determine whether GO R-0≦θ4 (for example, -5°C) or TRO≧02 (for example, 5°C).
Then, set the fan rotation speed to high speed l-I, and
3 (e.g. -1°C)≦GoRe≦01 (e.g. 1°C)
), set the blower fan rotation speed to low speed LO.

e4<], -RO<C)v, e i, <1. 'R
When O<0, -(1), set the intermediate speed according to the temperature deviation.

In other words, if we express such a function as f and the fan rotation speed as ω, then ω=f('I'g
(J) The following settings are made.2 Therefore, the blower fan rotation speed is determined based on either the target room temperature on the head side or the foot side in the vehicle, or whichever has the larger temperature deviation. As mentioned above, since the routine 32 is repeated at a predetermined period, control of the entire temperature in gj is finally achieved.

As explained below, according to the present invention, either one of the head side and the foot side inside the vehicle 1. ; Even if the temperature deviation from the target room temperature is very large, the local temperature deviation can be quickly eliminated by supplying a sufficient amount of blow 1 to remove the large temperature deviation. At the same time, the temperature of the entire interior of the car can be controlled, making it possible to control the air conditioning for comfort.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of an air conditioning control device explaining one embodiment of the present invention, Fig. 2 is a block diagram explaining an electric circuit connected to the air conditioning control device of Fig. 1, and Fig. 3 is an air conditioning control ”A
Flowchart 1-1 (Figure 4 is a continuation of Figure 73) is a flowchart explaining the overall flow of the control program of the microcomputer that operates 1ift. Fig. 6 is a diagram showing the opening degree of the cold/hot air door corresponding to the temperature deviation in the foot area, and Fig. 7 is the reference room temperature and reference 1] FIG. 4 is a diagram showing the rotational speed of the blower fan depending on the difference from the room temperature. 1 Vehicle interior, 2 Ventilator 91, 4 Ventilation fan, 12
...Air blower control actuator, 15.Head room temperature sensor, 16.Foot room temperature sensor, 17.Outside temperature sensor, 18. Eye sensor, 21..Target room temperature calculation circuit, 2.
2... Indoor temperature difference calculation circuit, 25... Comparison circuit, 27
・Room temperature setting section, 28・Drive circuit. Figure 1 Figure 3 Figure 5 Figure 2 Figure 7

Claims (1)

[Claims] An air conditioning control device for an automobile, in which air outlets for blowing independently controlled air from a common blower fan face each of the ceiling and floor sides of the car, and the air conditioning control device controls the room temperature of each of the ceiling and floor sides. It has a ceiling side temperature sensor and a legal standard temperature sensor that detect the ceiling side room temperature and a legal standard temperature sensor, and has a ceiling side L1 standard temperature calculation circuit and a legal standard temperature calculation circuit that calculate each target temperature of the ceiling side room temperature and the legal room temperature, A temperature difference calculation circuit is provided for calculating a first temperature difference between the ceiling side target temperature and a second temperature difference between the legal room temperature and the floor side target humidity, and the first temperature difference and the second temperature difference are calculated. An air conditioning control device for an automobile, comprising a comparison circuit that determines the rotational speed of the blower fan by comparing the magnitude of the fan.