JPH0536245B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioner for a vehicle.

[Conventional technology and its problems]

Air conditioners are widely used to make the indoor environment of vehicles comfortable, and the system generally includes an internal/external air intake switching damper, a blower, an evaporator, an air mix damper, a heater core, and an outlet switching damper. , the desired temperature is set using the temperature setting switch, and a microcomputer calculates the required blowing temperature by calculating the detection signals from the in-car sensor, the solar radiation sensor, and the outside air temperature sensor located inside the vehicle interior. It is designed to perform various controls such as damper opening, blower air volume switching, and suction and outlet switching.

In Japanese Patent Application Laid-open No. 57-77216, in order to respond to seasonal changes, the target indoor temperature is automatically corrected in response to changes in outside temperature, and the indoor temperature is raised during periods when the outside temperature is low, such as in the winter. A method has been proposed in which the opening degree of the air mix door is controlled so as to stabilize the indoor temperature and lower the indoor temperature during periods when the outside temperature is high, such as in the summer.

However, with this method, the indoor temperature is constantly corrected by the outside temperature while riding, so it is not possible to immediately adjust the temperature control depending on the length of the ride. Air conditioning that matches the human sensory memory and sensory paralysis phenomena, such as causing discomfort due to excessive compensation, or causing discomfort due to being too cold in the summer or too warm in the winter when riding for a long time. There was a problem that I couldn't do it.

Additionally, because the outside temperature sensor is usually installed in front of the capacitor, the temperature of the sensor rises during traffic jams or when the vehicle is stopped, and this error is reflected in the calculation results, causing the indoor temperature to fluctuate easily.

[Means for solving problems]

The present invention was developed through research in order to eliminate the above-mentioned problems, and its purpose is to eliminate the adverse effects of constant outside temperature correction type air conditioning control, and to automatically respond immediately to the riding time. An object of the present invention is to provide an air conditioner for a vehicle that can perform air conditioning under comfortable temperature conditions.

Another object of the present invention is to provide an air conditioner for a vehicle that can correct indoor temperature without using an outside temperature sensor, reduce costs, and avoid control malfunctions due to the use of an outside temperature sensor. be.

In order to achieve this objective, the present invention changes the conventional idea that indoor temperature correction based on outside temperature is always necessary for comfortable air conditioning, and instead corrects indoor temperature based on outside temperature for a certain period of time after riding. This is what I did.

In other words, the present invention is characterized by a room temperature setting device, a vehicle interior temperature sensor, a solar radiation sensor,
a calculation means for calculating a target indoor temperature from these signals; an air conditioning element for adjusting the opening degree of the mixer door, etc. by the calculation means; a time measurement means for measuring a certain period of time from the start of the vehicle; The indoor temperature is corrected using the solar radiation amount signal from the solar radiation sensor and the vehicle interior temperature signal from the vehicle interior temperature sensor,
The present invention includes a correction means for canceling the correction after a certain period of time has elapsed.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show an embodiment of the vehicle air conditioner according to the present invention. In FIG. 1, U is a unit case, which includes an intake door 1, a blower 2, an evaporator 3, and a mixer door. 4, a heater core 5, and a mode door 6.

Further, as a control system, a room temperature setting device 7, a vehicle interior temperature sensor 8, and a solar radiation sensor 9 are provided in the vehicle interior, and a potentiometer 10 and a mode sensor 11 for detecting the opening of the mixer door are connected to an analog-to-digital converter 12. It is connected to a microcomputer 13, which is a calculation means, through the microcomputer 13, which is a calculation means.

The microcomputer 13 issues driving signals to the air conditioning elements. Specifically, for the mixer door 4, an actuation signal is sent to the opening adjustment actuator 15 via the drive circuit 14, and for the intake door 1 and the mode door 6, an actuation signal is sent to the opening adjustment actuator 15, respectively. Switching circuit 16, 17
The operation of the switching actuators 18 and 19 is controlled through the switch. Also, evaporator 3
, the magnetic clutch 2 of the compressor 21 is connected via the magnetic clutch drive circuit 23.
The rotation speed of the blower 2 is controlled by a drive circuit 20.

Although this point is similar to the conventional vehicle air conditioner, in the present invention, the outside temperature sensor is preferably omitted, and therefore the input circuit to the microcomputer 13 is also omitted. Instead of this, a timer measures a certain period of time from the start of the vehicle, and while the timer measures time, the indoor temperature is corrected using the solar radiation amount signal from the solar radiation sensor and the vehicle interior temperature signal from the vehicle interior temperature sensor. , a correction means for canceling the correction after a certain period of time has elapsed.

Specifically, the correction means is microcomputer 1.
3, and the vehicle's starting switch 24
In the initial stage, the indoor temperature signal from the vehicle indoor temperature sensor 8 and the solar radiation signal from the solar radiation sensor 9, which are input after the start of the vehicle, are stored, a target indoor temperature is calculated from this stored data, and necessary control signals are output. It includes a control unit 130 and a timer for canceling the target indoor correction at the time of turning on the start switch after a predetermined period of time has passed after turning on the start switch 24, and causing the room temperature setting device 7 to control the indoor temperature at a temperature proportional to the temperature. A release control section 131 is provided.

Further, when the start switch 24 is turned off within a predetermined time after the start switch 24 is turned on, the initial control unit 130
A restart control unit 132 is provided to store the indoor temperature and solar radiation input signals.

More preferably, in order to prevent an input error in the solar radiation signal of the initial control unit 130 in the case where the sun happens to be hidden behind clouds when the start switch 24 is turned on, or if the engine is started in a garage and started, Solar radiation correction unit 133 that calculates and stores the average solar radiation for a predetermined time after turning on the start switch 24
is provided.

[Effect of the embodiment]

Next, indoor temperature control according to the present invention will be explained with reference to flowcharts shown in FIGS. 2 and 3.

In other words, in Fig. 2, starting is determined by the ON or OFF signal of the start switch (IGN), and by inputting the ON signal, the indoor temperature Tin from the vehicle interior temperature sensor and the solar radiation Q from the solar radiation sensor are initialized. a storage circuit ST of the control unit 130;
Unless the start switch is turned off within the time A set by the timer (for example, 30 to 40 minutes) after starting, the target indoor temperature TRC is stored in the SQ.
Functional formula TRC=TPCT+a(TPCT-ST)-bSQ
(where a and b are constants, and TPCT is the setting value of the indoor temperature setting device), and is calculated based on the signals from each sensor mentioned above, and a control signal is output according to the calculation result to operate the necessary temperature control elements. Control.

After the timer setting time A has elapsed, the correction operation based on the vehicle interior temperature and the amount of solar radiation for a certain period of time from the start is canceled, and constant control is performed at a temperature proportional to the room temperature setting device.

Additionally, if the start switch is turned off within time A after starting, timer A is temporarily stopped and timer B is started at the same time, and the start switch is turned on again within a predetermined time B after the start is turned off. If so, timer A is activated again and control continues.

Furthermore, in the step, the amount of solar radiation at the time of turning on the start switch is input to the memory circuit SQ;
As mentioned above, if the sun happens to be hidden behind clouds at the time of startup, SQ = 0, which may reduce the accuracy of room temperature correction. This can be easily avoided by using a program that inputs the average value of solar radiation amount QAV for the hour (Smin) as SQ.

〔Effect of the invention〕

According to the present invention described above, the target indoor temperature is corrected only for a predetermined period of time after getting into the vehicle, and thereafter constant control is performed by the room temperature setting device in the vehicle interior. It is possible to eliminate the discomfort caused by excessively correcting the outside temperature and the discomfort caused by being too cold or too warm when riding for a long time, and it is possible to realize comfortable air conditioning that is responsive to ergonomics.

Furthermore, the target indoor temperature correction is calculated based on the signals from the solar radiation sensor and indoor temperature sensor, which provide detection results close to the outdoor temperature, without using the outdoor temperature sensor, which eliminates the need for an expensive outdoor temperature sensor and improves control system Not only can the system be simplified, but also excellent effects can be obtained, such as eliminating inconveniences in control caused by increases in sensor temperature during traffic jams or when the vehicle is stopped.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram showing an embodiment of a vehicle air conditioner according to the present invention, and FIGS. 2 and 3 are data processing programs for the apparatus according to the present invention. 7... Temperature setting device, 8... Vehicle interior temperature sensor,
9... Solar radiation sensor, 13... Microcomputer, 130... Initial control section, 131... Initial control canceling section.

Claims (1)

[Claims] 1. A room temperature setting device, a vehicle interior temperature sensor, a solar radiation sensor, a calculation means for calculating the target indoor temperature from these signals, an air conditioning element that uses the calculation means to adjust the opening degree of the mixer door, etc. a timer for measuring a certain period of time; and while the timer is measuring time, the indoor temperature is corrected using a solar radiation amount signal from the solar radiation sensor and a vehicle interior temperature signal from a vehicle interior temperature sensor, and after a certain period of time has elapsed, the indoor temperature is corrected. An air conditioner for a vehicle, comprising a correcting means for canceling the correction.