JPH072442B2 - Air conditioner for vehicle - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner that is adapted to perform solar radiation amount correction.

(Prior Art) In a conventional vehicle air conditioner, the air conditioning control means is controlled by using the amount of solar radiation as one control element.
As the solar radiation amount detection sensor, a photoelectric conversion element is used instead of the thermistor. The photoelectric conversion element is convenient because it is not directly affected by the temperature, but its response speed is too fast, so that when it is shielded from light, its output changes rapidly and the temperature control means operates unnecessarily.

For this reason, it is known to delay the detected solar radiation output as disclosed in Japanese Patent Publication No. Sho 58-19484.

(Problems to be Solved by the Invention) There is a problem in that it is difficult to realize good air conditioning that matches changes in the sensation of the occupant, only by delaying the detected solar radiation output as described above.

An object of the present invention is to provide an air conditioning apparatus for a vehicle that solves the above problems and can realize good air conditioning that matches changes in the sensation of an occupant.

(Means for Solving Problems) In order to solve the above problems, the present invention is configured as follows.

As shown in FIG. 1, at least the vehicle interior temperature detecting means 1,
An insolation amount detecting means 2 for detecting an insolation amount received by the vehicle, a vehicle interior temperature setting means 3, and a computing means 4 for computing a vehicle interior temperature control signal based on output signals from these means are provided. In the vehicle air conditioner for controlling the temperature control means 5 based on the above, the first correction value for sequentially increasing the correction value to the target correction value corresponding to the detected solar radiation amount from the time when the solar radiation detection output of the solar radiation amount detection means is generated. The generation means 6, the control means 7 for measuring a predetermined time from the time when the solar radiation amount detection means 2 detects the solar radiation reduction, and the first correction value generation means 6 for maintaining the correction value until the time measurement ends, and the time measurement end by the control means 7. The second correction value generating means 8 for sequentially decreasing the correction value from the correction value of the first correction value generating means 6 with a predetermined gradient from time, and the first before and during the time counting by the control means 7.
The output of the correction value generation means 6 and the correction means 9 for correcting the vehicle interior temperature control signal by the output of the second correction value generation means 8 after the time measurement is completed.

(Operation) Based on at least the vehicle interior temperature detected by the vehicle interior temperature detecting means 1, the solar radiation amount detected by the solar radiation amount detecting means 2, and the temperature set by the vehicle interior temperature setting means 3, the vehicle interior temperature control signal is output by the computing means 4. Is calculated, and the vehicle interior temperature control signal is calculated by the computing means 4, and the temperature of the mix damper opening, the air flow rate, the operating time of the cooler, the period, etc. is calculated based on the vehicle interior temperature control signal via the correcting means 9. The control means 5 is controlled to control the vehicle interior temperature.

On the other hand, when the output of the solar radiation amount detecting means 2 is generated, that is, when the vehicle receives the solar radiation, the correction values are sequentially generated by the first correction value generating means 6 with a predetermined gradient to the target correction value corresponding to the detected solar radiation amount. This correction value is added in the vehicle interior temperature control signal calculated by the calculation means 4 and the correction means 9,
The temperature control means 5 is controlled by the corrected vehicle interior temperature control signal. Therefore, when the vehicle is exposed to solar radiation, the corrected vehicle interior temperature control signal is gradually corrected by the correction value having the predetermined gradient determined by the first correction value generating means 6.

When the solar radiation is cut off, it is determined by the output of the solar radiation amount detecting means 2, and the control means 7 measures a predetermined period from the time when the solar radiation disappears, and during this predetermined period, the correction value of the first correction value generating means 6 starts timing. The previous correction value is maintained. As a result, the corrected vehicle interior temperature control signal does not change immediately after the insolation disappears and is maintained at the value immediately before the time measurement for a predetermined period.

After the time counting by the control means 7 is completed, the correction values output from the first correction value generating means 6 immediately before the time counting are sequentially decreased by the second correction value generating means 8 with a predetermined gradient,
This correction value is used in place of the correction value output from the first correction value generating means 6, and the vehicle interior temperature control signal output from the calculating means 4 is a correction value output from the second correction value generating means 8. Is added to form a corrected vehicle interior temperature control signal.

Therefore, not only is it delayed when there is insolation,
Since the correction value is increased at a predetermined gradient and the correction value is decreased at a predetermined gradient after the insolation has disappeared, it is possible to perform a good correction according to the sensation of the occupant.

(Examples of the Invention) Hereinafter, the present invention will be described with reference to Examples.

FIG. 2 is a block diagram of the vehicle air conditioner of one embodiment of the present invention.

21 is an air conditioner body, 22 is an air conditioner body 21
Is a control device for controlling the.

The air conditioner main body 21 is an intake damper 24 that selects whether the intake air is taken into the vehicle interior air or the outside air from the upstream side to the downstream side of the duct 23, and the air sucked through the intake damper 24 is taken into the vehicle interior. An evaporator that exchanges heat with the blower air while the blower 25 that blows air to 30 and the cooler 34 that will be described later are operating
26, in the air passing through the evaporator 26, a heater 28 to be described later
Mix damper 27 for controlling the amount of air split into two, a heater core 28 that circulates the cooling water of the vehicle internal combustion engine and acts as a heater to heat passing air, and a mode switching damper that selects an air outlet to the passenger compartment 30. Has 29.

The compressor 35, the condenser 36, the receiver tank 37, and the expansion valve 38 together with the evaporator 26 form a cooler 34. Furthermore, the rotation of the output shaft of the in-vehicle internal combustion engine is controlled by the pulley 39.
Have been transmitted to. The rotation of the pulley 39 is transmitted to the compressor 35 via the magnet clutch 40, and this transmission drives the compressor 35.

The air outlet to the passenger compartment 30 is formed by a vent outlet 31 that blows air toward the occupant's face and a heat outlet 32 that blows air from the feet, and one or both of them by a mode switching damper 29. Is selected.

The intake damper 24 is
The mix damper 27 is driven by the motor actuator 41, and the mode switching damper 29 is driven by the motor actuator 42. In FIG. 2, reference numerals 44 to 48 are drive circuits for driving the motor actuator 33, the blower 25, the magnet clutch 40, and the motor actuators 41 and 42, respectively.

On the other hand, an inside air temperature sensor 50 for detecting the inside air temperature of the passenger compartment, an insolation amount sensor for detecting the amount of insolation (a photoelectric conversion element is the detection end) 51, an evaporator outlet air temperature, that is, an evaporator outlet air temperature for detecting the temperature at point A. A sensor 52, an outside air temperature sensor 53 for detecting the outside air temperature, a setter 54 for setting the vehicle interior temperature, and a potentiometer 55 for detecting the mix damper opening are provided. The output of each sensor, the output of the setting device 54, and the output of the potentiometer 55 are supplied to an A / D converter (hereinafter referred to as ADC) 57 via a multiplexer 56, converted into digital data, and converted by the ADC 57. The digital data is supplied to the microcomputer 58.

The microcomputer 58 basically includes a CPU, a ROM storing a program, a RAM storing data, an input port, an output port and a timer. According to the program stored in the ROM, the output digital data from the ADC57 is read through the input port, and the data processed and calculated by the CPU is output through the output port to the drive circuit 44.
~ 48, the air flow rate of the blower 25, the operation time and period of the compressor controlled via the magnetic clutch 40, the opening degree of the mix damper 27 is controlled, and the vehicle interior temperature is set to the temperature set by the setter 54. Controlled as much as possible.
The intake damper will be described assuming that the inside air circulation and the outside air intake are manually specified.

The operation of one embodiment of the present invention will be described with reference to the program stored in the ROM with reference to the flowchart of FIG.

When the execution of the program is started, initialization such as clearing the RAM is made (step a). Then sensors 50-53 converted to digital data via the input port
Output, the output of the setting device 54, and the output of the potentiometer 55 are read and temporarily stored in a predetermined area of the RAM, and a vehicle interior temperature control signal (hereinafter referred to as integrated data) T =
_{T R + K 1 T E +} K 2 T A + K 3 T S -K 4 T D + K 5 are stored after calculation (step b). Here, T _R is the inside air temperature, T _E is the evaporator outlet air temperature, T _A is the outside air temperature, and T _S is the amount of solar radiation, which are detected by the sensors 50 to 53, respectively. T _D is the setting device
It is the set temperature set in 54, and K _{1 to} K ₅ are constants. Therefore, the total data T is related to the deviation between the set passenger compartment temperature and the detected inside air temperature, and further corresponds to the value corrected by the evaporator outlet air temperature T _E , the amount of solar radiation T _S , and the outside air temperature to set the passenger compartment temperature. It can also be said to be a value related to the heat load for controlling the vehicle interior temperature.

The integrated data T will be described later after step b (Fig. 5).
Is corrected as described above (step c). Hereinafter, the corrected integrated data will be simply referred to as integrated data.

Following step b, the data T _F = T _E + K ₆ θ + β is calculated and stored (step d). Here, θ indicates the opening of the mix damper 27, and the opening when all the air that has passed through the evaporator 26 passes through the heater core 28 is θ = 100% (FH). Furthermore, K ₆ and β are constants. Therefore, the data T _F corresponds to the temperature of the air blown into the passenger compartment.

Following step d, the blow rate of the blower 25 is controlled according to the pattern shown in FIG. 4 (a) (step e). Next, the opening degree of the mix damper 27 is controlled according to the pattern shown in FIG. 4 (b) (step f),
Next, the drive set temperature of the compressor 35 is controlled according to the pattern shown in FIG. 4 (c) (step g).
In step g, when the evaporator outlet air temperature T _E is equal to or higher than the temperature pattern shown in FIG. 4 (c), the magnet clutch 40 is energized to drive the compressor 35,
When the temperature pattern is below the temperature pattern shown in FIG. 4 (c), the compressor control is performed so that the magnet clutch 40 is de-energized. The horizontal axes of FIGS. 4 (a), (b) and (c) are the total data corrected in step c. Through steps (e) to (g), the vehicle interior temperature is controlled to the set vehicle interior temperature. Following step g, blowout mode control is performed to select the vent outlet 31 or / and the heat outlet 32 according to the data T _F (step h), and step h is executed again after step h. The intake damper 24 is a microcomputer.
It is excluded from the flowchart of FIG. 3 because it is controlled to the outside air introduction state or the inside air circulation state according to the output of a manual switch (not shown) whose output is supplied to 58.

The integrated data correction step c is executed as shown in FIG. In FIG. 5, T _S and T _S ′ are correction values and target correction values converted into the total data T.

In the total data correction step c, the correction value T _S is added to the total data T, and the total data T is corrected by the correction value T _S (step c ₁ ). In step c ₁ is the correction value T _S whether equal correction target value T _S 'is checked (step
c ₂ ). Here, the correction target value T _S ′ is a value obtained by converting the value obtained by multiplying the solar radiation amount detected by the solar radiation amount sensor 51 by a constant K ₃ into the integrated data T. For example, when the solar radiation is intermittent, the correction target value T _S ′ is set. The value T _S ′ changes as shown in FIG. 6 (a) because its response speed is fast.

Correction value T _S and the target correction value T _S 'and when are equal in step c _2, the following step c ₂ flag γ is set (step c _3), step d is performed. Step d
After that, the corrected comprehensive data is used.

When the correction value T _S is not equal to the target correction value T _S ′ in step c ₂ , it is checked whether or not [target correction value T _S ′> correction value T _S ] (step c ₄ ). When the solar radiation starts to occur, that is, when the target correction value T _S ′ in FIG. 6 (a) rises and the predetermined value is maintained, in step c ₄ , [target correction value T _S ′> correction value T _S ] Is determined. Therefore, the flag γ is set following step c ₄ (step c ₅ ), the processing of [T _S ← (T _S + ΔT _S )] is performed, and the correction value T _S is increased by ΔT _S (step c ₆ ), Step d is executed. Of course, the corrected comprehensive data is used after step d.

Therefore, Figure 6 when passing through the route of step c _4, c ₅ and c ₆ as described above (a), from the time of starting to have sunlight as (b), the said step c ₄ to c ₆如the correction value T _S through a route increased by one [Delta] T _S, so that the correction value T _S with a gradient corresponding to [Delta] T _S is gradually increased stepwise. In FIG. 6 (b), the step shape is simplified and shown in a straight line shape. The correction value T _S is increased via the route of steps c ₄ , c ₅ , and c ₆ , and the correction value T _S becomes the target correction value.
When it reaches T _S ′, it goes through the route of steps c ₂ and c ₃ , and at this time, the correction value T _S is equal to the target correction value T _S ′, and insolation begins. In this case, the correction value T _S is changed with a predetermined gradient with a delay until reaching the target correction value T _S ′.

When it is determined in step c ₄ that [target correction value T _S ′ <correction value T _S ], for example, when the solar radiation is blocked by a cloud and the sunlight is not present, as shown in FIG. )
The target correction T _S of is when the falling and when the lowered state is maintained. When it is determined in step c ₄ that [target correction value T _S ′ <correction value T _S ], it is checked whether the flag γ is set (step c ₇ ). When the flag γ is set in step c ₇ , the timer starts counting (step c ₈ ), the flag γ is reset (step c ₉ ), and then it is checked whether the set time t of the timer has elapsed. is (step c _10). Process when has elapsed set time t in step c ₁₀ Subsequently to Step c _{10 [T S ← (T S -ΔT S} ) ] is made (step c _11), the step d is performed. When the flag γ is reset at step c ₇ is performed in Step c ₁₀ following step c ₇ is performed. The step d from step c ₁₀ step c ₁₁ is bypassed when the set time t has not elapsed in step c ₁₀ is executed. Of course, the corrected comprehensive data is used after step d.

Route of step c _7, c _8, c ₉ when sunlight is eliminated from the state in which the solar radiation as described above there was a timer time measurement with a flag initially via γ is reset is initiated. Next, when the timer set time t has not elapsed, steps c ₄ , c ₇ , c ₁₀ and step d are executed until the timer set time t elapses. In this state, [correction value T _S = target correction value T _S ′], and the target correction value T _S ′ is maintained as shown in FIG. 6 for a period t from when the solar radiation disappears. Become. When the set time t of the timer elapses, step c ₁₀ will be followed by step c ₁₁ ,
The processing of [T _S ← (T _S −ΔT _S )] is performed and the correction value T _S becomes Δ
Decreased each time the T _S by one step c ₁₁ is executed, [Delta] T _S correction value T _S with a gradient corresponding to the [target correction value T _S '= corrected value T _S]
It will decrease in steps until it reaches (step c ₂ ). In addition, in FIG. 6B, the staircase shape is shown as a straight line for simplification. Further, when the correction value T _S is in the middle of the decreasing direction and there is insolation δ that is a target correction value slightly larger than the correction value T _{S, the} flag γ is set in step c ₅ , and the execution of the next step C ₄ is performed. Sometimes [T _S ′ <T _S ], and the timer starts counting again in step c _{8. In} this case, the correction value T _S is maintained at the value at the time of occurrence of solar radiation δ for the period t. It will be.

Note that the [Delta] T _S when the correction value T _S is increased in the embodiment described above, the correction value T _S is exemplified a case where equal to the [Delta] T _S when reduced, in the case of descending the case of increasing You may make it different.

(Effects of the Invention) As described above, according to the present invention, the vehicle interior temperature control signal, that is, the integrated signal is increased by a predetermined gradient when the amount of solar radiation is increased, and is set to the integrated signal immediately before the amount of solar radiation is reduced. It is maintained for a certain period of time, and when this predetermined period of time has elapsed, it is designed to be reduced with a predetermined gradient, so the timing at which correction is applied to the change of solar radiation from yes to no, and change from no to yes can be changed. As a result, good correction suitable for the user's feeling can be made.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing the configuration of the present invention. FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention. FIG. 3 and FIG. 5 are flowcharts for explaining the operation of one embodiment of the present invention. 4 and 6 are diagrams for explaining the operation of one embodiment of the present invention. 1 ... vehicle interior temperature detecting means, 2 ... solar radiation amount detecting means, 3
...... In-vehicle temperature setting means, 5 ...... Temperature control means, 6 ......
First correction value generating means, 7 ... Control means, 8 ... Second correction value generating means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsumi Iida 39, Toyo, Konan-cho, Osa-gun, Saitama-gun, Chiyohara, Konan Plant, Diesel Equipment Co., Ltd. 39, Higashihara Diesel Equipment Co., Ltd. Gangnam Factory

Claims (1)

[Claims] 1. At least a vehicle interior temperature detecting means, a solar radiation amount detecting means for detecting an amount of solar radiation received by a vehicle, a vehicle interior temperature setting means, and a computing means for computing a vehicle interior temperature control signal based on output signals from these means. In the vehicle air conditioner for controlling the temperature control means based on the vehicle interior temperature control signal, the correction value is sequentially set to a target correction value corresponding to the detected solar radiation amount from a time when the output of the solar radiation amount detection means is generated. First correction value generating means for increasing, control means for measuring a predetermined time from the time when the amount of solar radiation detection is detected by the solar radiation amount detecting means, and for maintaining the correction value by the first correction value generating means until the end of time measurement, and timing by the control means. Second correction value generation means for sequentially decreasing the correction value from the correction value maintained by the first correction value generation means at a predetermined gradient from the end, and before and during time counting by the control means The vehicle air conditioner is provided with a correcting means for correcting the vehicle interior temperature control signal by the output from the first correction value generating means and the output from the second correction value generating means after the time is finished. .