JP2709835B2 - Vehicle air conditioning controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a vehicle air-conditioning control device,
The present invention relates to an apparatus for automatically controlling an air conditioner based on outside air temperature or the like.

(Prior Art) Conventionally, as this type of apparatus, for example, Japanese Patent Publication No. 59-3933
As disclosed in Japanese Patent Application Publication No. 4 (1999), a control signal corresponding to the heat load in the vehicle interior is calculated based on the vehicle interior temperature, the outside air temperature, the set temperature and the like, and the heat of the blower, the air mix door, etc. It is known to control the operation of a switching device.

In such a device, the change of the control signal corresponding to the change of the set temperature is constant, that is, the calculation constant added to the set temperature in the calculation of the control signal described above is constant, and as a result, the vehicle interior temperature becomes the set temperature. Air-conditioning control is performed so as to approach the temperature.

(Problem to be Solved by the Invention) However, the actual feeling of air conditioning is affected by environmental conditions. For this reason, even if the set temperature is the same, for example, when the solar radiation is strong in summer, the cooling sensation is insufficient compared with the case without the solar radiation. There was a problem that air conditioning feeling could not be obtained. As a countermeasure, Japanese Utility Model Laid-Open No. 63-154304 has been proposed by the applicant, but since the set temperature gain is changed only by the magnitude of the amount of solar radiation, the temperature correction is still rough.

In particular, in a configuration in which the temperature setting is set in a stepwise manner by using several switches in order to simplify the operation panel of the air conditioner, the above-described problem becomes more apparent.

Therefore, an object of the present invention is to provide a vehicle air-conditioning control device capable of obtaining a comfortable air-conditioning feeling.

(Means for Solving the Problems) Therefore, as shown in FIG. 1, the components of the vehicle air-conditioning control device according to the present invention include a vehicle interior temperature detecting means for detecting the temperature inside the vehicle, Outside air temperature detecting means for detecting, insolation detecting means for detecting the amount of solar radiation, temperature setting means for setting the temperature in the cabin, setting of the cabin temperature obtained by the cabin temperature detecting means and the temperature setting means And a heat load condition calculating means for calculating a heat load condition based on the detected values of the outside air temperature detecting means and the solar radiation amount detecting means, and a heat load condition calculated by the heat load condition calculating means. A set temperature gain calculating means for calculating a weight of a set value of the temperature setting means so as to increase as the absolute value increases; and a vehicle interior temperature detecting means, the outside air temperature detecting means, and the solar radiation amount detecting means. Comprehensive signal calculating means for calculating a total signal relating to a heat load based on each detected value, a set value of the temperature setting means, and a calculated value of the set temperature gain calculating means, at least a duct opened to a vehicle compartment, and the duct A blower that blows air toward the interior of the vehicle, a heat load adjusting means including a heat exchanger that performs heat exchange of passing air by the blower, and drives the heat load adjusting means in accordance with a calculation value of the total signal calculating means. And driving means for performing the operation.

(Operation) Therefore, the heat load condition is calculated by the heat load condition calculation means using the vehicle interior temperature, the outside air temperature, the amount of solar radiation, and the set temperature as parameters, and the gain of the set temperature used in the total signal calculation means according to the calculated value. Is calculated by the set temperature gain calculating means, and a total signal relating to the heat load is calculated by the total signal calculating means based on the calculated value and the parameter. The control signal output to the heat load adjusting means is corrected according to the conditions, and therefore, the above-described object can be achieved.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 2, an air conditioning control device for a vehicle includes an air conditioning duct 1.
An intake door switching device 2 is provided at the most upstream side of the air conditioner. An inside / outside air switching door 5 is disposed at a portion where the inside air inlet 3 and the outside air inlet 4 are separated from each other. Is operated by the actuator 6 so that the air introduced into the air conditioning duct 1 can be selected from inside air and outside air.

The blower 7 sucks air into the air-conditioning duct 1 and blows the air downstream. An evaporator 8 and a heater core 9 are provided behind the blower 7.

The evaporator 8 includes a compressor 10, a condenser 11,
A cooling cycle is constituted by pipe connection with the liquid tank 12 and the expansion valve 13, and the compressor 10 is connected to the engine 14 via an electromagnetic clutch 15, and is controlled to be turned on and off by intermittently connecting and disconnecting the electromagnetic clutch 15. . The heater core 9 circulates the cooling water of the engine 14 to heat the air. An air mix door 16 is provided in front of the heater core 9, and the opening of the air mix door 16 is determined by an actuator.
By adjusting by 17, the amount of air passing through the heater core 9 and the amount of air bypassing the heater core 9 are changed, and as a result, the temperature of the blown air is controlled.

The downstream side of the air-conditioning duct 1 is divided into a defrost outlet 18, a vent outlet 19 and a heat outlet 20 and opens to the vehicle interior 21. The divided portions are the mode doors 22a and 22a.
b, 22c are provided, and by operating these modes 22a, 22b, 22c with the actuator 23, a desired blowing mode can be obtained.

The actuators 6, 17, 23, the blower 7 and the electromagnetic clutch 15 of the compressor 10 are each provided with a drive circuit.
Control is performed based on output signals from the microcomputer 25 via 24a to 24e. This microcomputer 25
Is a well-known device having a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), an input / output port (I / O), etc., not shown. vehicle interior temperature sensor 26 for detecting the vehicle interior temperature T _R from vehicle interior temperature sensor 26 for detecting the temperature of the room, the outside air temperature sensor 27 for detecting the outside air temperature T _a, insolation
Each output signal from the solar radiation sensor 28 for detecting Ts, and the opening detector 29 for detecting the opening of the air mix door 16 described above.
Is selected via a multiplexer (MPX) 31, converted into a digital signal via an A / D converter 32, and input.

Further, an output signal from the operation panel 34 is input to the microcomputer 25. The operation panel 34 includes manual switches 35a to 35d for switching the rotation speed of the blower 7 between LOW, MED, HI, and MAX HI, an AUTO switch 35e for automatically controlling the operation of the blower 7, the compressor 10, and the like.
An OFF switch 35f for stopping the driving of the compressor, an A / C switch 36 for operating the compressor 10, a changeover switch 37 for introducing inside air or outside air, mode switches 38a to 38d for switching the blowing mode, and a temperature setting device 39. Have.

The temperature setter 39 includes an up / down switch 39a and a display unit 39b for displaying the set temperature Td.
With this operation, the set temperature shown on the display section 39b can be changed within a predetermined range. Note that the temperature setting device may be a device that slides a template bar, or a device that is configured to set the temperature stepwise by several switches.

FIG. 3 is a flowchart showing a control example of the vehicle air conditioning control device in the microcomputer 25 described above, and its function will be described below with reference to FIG.

The microcomputer 25 starts executing the program from step 50, and in the next step 52, the vehicle interior temperature
T _R, the outside air temperature T _A, and sequentially multiplexer insolation Ts 31
And input via the A / D converter 32, and the operation panel 3
The set temperature Td is input from the temperature setter 39 of No. 4 and stored in a predetermined area of the RAM.

Then, the process proceeds to the next step 54, in which the heat load condition in the vehicle compartment is changed to the heat load condition signal Q by the following arithmetic expression (1).
Is calculated as

_{Q = α (T R -Td)} + βTs + γ (T A -25) ...... (1) where, α, β, γ is an operation count (constant).

Here, a state in which the heat load condition signal Q is positive (+) means that the heat load condition is a cooling load condition, and Q increases as the cooling load condition increases. Q is negative (-)
Means that the heat load condition is a heating load condition, and Q decreases as the heating load condition increases.

After the Q calculation, in step 56, a set temperature gain Kd (weighting of a set value) is calculated based on a predetermined basic pattern. According to this basic pattern, when the thermal load condition is large, the thermal load condition signal Q largely moves to the (+) or (-) side, and thus Kd has a large value.

After step 56, in step 58, a total signal T relating to the heat load in the vehicle compartment is calculated by, for example, the following equation (2).

_{T = K R T R + K} A T A + KsTs + KdTd + C ...... (2) _{where, K R, K A, Ks} , C is a calculation coefficient (constant) or processing constant, Kd is a set temperature that has been calculated in step 56 Gain.

Here, the larger the value of the integrated signal T, the higher the cooling request, and the smaller the value, the higher the heating request.

As described above, the total signal T has a larger value as the set temperature gain Kd increases as the thermal load condition increases. Accordingly, when the cooling load condition is large, T becomes larger than when the cooling load condition is small. When the heating load condition is large, T becomes small.

In step 60, for example, the opening Θx of the air mix door 16 and the air volume of the blower 7 are calculated based on a predetermined basic pattern in accordance with the total signal T.

Further, the air mix door 16 and the blower 7 are controlled via the drive circuits 24d, 24d based on the above calculated values, and thereafter, the process returns to the main routine via step 70.

Therefore, in the above-described operation example, the set temperature gain Kd increases as the absolute value of the thermal load condition signal Q increases, and the total signal T in step 60 increases as the Kd increases. The control amount of the air mix door 16 and the blower 7 as the adjusting device can be increased.

(Effect of the Invention) Therefore, since the operation coefficient of the set temperature in the total signal is changed according to the heat load condition, even if the change amount of the temperature setting means is the same, the heat load condition (outside air temperature, vehicle interior, The control signal output to the thermal load adjusting means is corrected according to the temperature, the amount of solar radiation, and the set temperature, and the set temperature gain is calculated from the outside air temperature, the vehicle interior temperature, and the set temperature as well as the amount of the solar radiation. In addition, there is an effect that it is possible to provide a vehicle air-conditioning control device that can provide a more comfortable air-conditioning feeling.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a vehicle air-conditioning control device according to the present invention, FIG.
FIG. 3 is a flowchart showing an example of a control operation of the vehicle air conditioner control device. 100 vehicle interior temperature detecting means, 110 external air temperature detecting means, 120 solar radiation detecting means, 130 temperature setting means, 140 thermal load condition calculating means, 15
0: set temperature gain calculating means, 160: total signal calculating means, 170: thermal load adjusting means, 180: driving means.

Claims (1)

(57) [Claims] 1. A vehicle interior temperature detecting means for detecting a temperature in a vehicle interior, an outside air temperature detecting means for detecting an outside air temperature, a solar radiation amount detecting means for detecting a solar radiation amount, and a temperature setting for setting a temperature in the vehicle interior. Means for calculating a heat load condition based on a deviation between a vehicle interior temperature obtained by the vehicle interior temperature detection means and a set value of the temperature setting means, and respective detection values of the outside air temperature detection means and the solar radiation amount detection means. Heat load condition calculating means, and setting temperature gain calculating means for calculating weighting of the set value of the temperature setting means so as to increase as the absolute value of the heat load condition calculated by the heat load condition calculating means increases. A heat load is calculated based on the detected values of the vehicle interior temperature detecting means, the outside air temperature detecting means, the insolation detecting means, the set value of the temperature setting means, and the calculated value of the set temperature gain calculating means. A total signal calculating means for calculating a total signal related to the heat load, at least including a duct open to the vehicle interior, a blower arranged in the duct to blow air toward the vehicle interior, and a heat exchanger for exchanging heat of passing air by the blower. An air conditioning control device for a vehicle, comprising: an adjusting unit; and a driving unit that drives the heat load adjusting unit according to a calculation value of the total signal calculating unit.