JPH0352569Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a vehicle air conditioner with solar radiation correction control.

(Prior art) In a conventional air conditioner for a vehicle, the amount of solar radiation is also detected as one of the detection elements, a vehicle interior temperature control signal is calculated including the amount of solar radiation, and the temperature control means is controlled based on the vehicle interior temperature control signal. In addition, photoelectric conversion elements have been used in place of thermistors as solar radiation detection sensors. Although the photoelectric conversion element is advantageous because it is not directly affected by temperature, its response speed is too fast, so when it is cut off, its output changes rapidly, causing the temperature control means to operate unnecessarily.

For this reason, it is known to gradually change the detected solar radiation output change within a certain period of time, as shown in, for example, Japanese Patent Laid-Open Publication No. 59-34915.

(Problem to be solved by the invention) As mentioned above, when using the conventional example of so-called constant slope correction, in which the detected solar radiation output change is gradually changed over a certain period of time, it is difficult to correct the change in the detected solar radiation output when the window surface or the car body is cold, for example in winter. Even if solar radiation hits the vehicle, there is no discomfort to the occupants even if no correction is made based on the detected solar radiation amount. There was a problem that the water got cold and caused discomfort.

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

As shown in FIG. 1, at least the vehicle interior temperature detection means 1, the outside air temperature detection means 2, the solar radiation amount detection means 3 for detecting the amount of solar radiation received by the vehicle, and the vehicle interior temperature setting means 4, and the outputs from these means. a calculating means 5 for calculating a vehicle interior air temperature control signal; and when the amount of solar radiation changes, the vehicle interior air temperature control signal is calculated according to the detected amount of solar radiation before the change, and is calculated according to the detected amount of solar radiation after the change. and a correction means 6 for changing the vehicle interior temperature control signal with a gradient according to the outside air temperature up to the calculated vehicle interior temperature control signal,
The temperature adjustment means 7 is controlled based on the vehicle interior air temperature control signal output from the correction means 6.

(Function) Therefore, when the solar radiation changes by the correction means 6, the vehicle interior air temperature control signal is changed from the vehicle interior air temperature control signal calculated according to the detected solar radiation before the change to the detected solar radiation after the change. The calculated vehicle interior air temperature control signal is then changed at a gradient that accompanies the outside air temperature. The temperature adjusting means 7 is controlled by the corrected cabin air temperature control signal output from the correcting means 6.
is controlled.

Therefore, in the summer, when the temperature of the window surface and the vehicle body is high and the radiant heat to the body surface of the occupants is large, during sunlight, correction is made quickly within a time range that does not impair the feeling of the occupants, and in the winter, the temperature of the window surface and the vehicle body is When the body is low and the radiant heat is small, correction can be made in a time corresponding to changes in the occupant's feeling even during sunlight.

(Example) The present invention will be explained below with reference to examples.

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention.

21 is an air conditioner main body, and 22 is a control device that controls the air conditioner main body 21.

The air conditioner main body 21 has an intake damper 2 arranged from the upstream side to the downstream side of the duct 23, which selects whether the intake air is to be air inside the vehicle or outside.
4. A blower 25 that blows the air sucked in through the intake damper 24 into the vehicle compartment 30, an evaporator 26 that exchanges heat with the blown air while the cooler 34 (described later) is in operation, and a heater 28 (described later) in the air that has passed through the evaporator 26. A mix damper 27 that controls the amount of air to be diverted, a heater core 28 that circulates the cooling water of the vehicle internal combustion engine and acts as a heater to heat the passing air, and a mode switching damper 29 that selects the air outlet to the vehicle interior 30. We are prepared.

The compressor 35, condenser 36, receiver tank 37, and expansion valve 38 together with the evaporator 26 constitute a cooler 34. Furthermore, the rotation of the output shaft of the vehicle-mounted internal combustion engine is transmitted to the pulley 39. The rotation of the pulley 39 is controlled by the magnetic clutch 4.
0 to the compressor 35, and this transmission drives the compressor 35.

The air outlet to the vehicle interior 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.
One or both of them are selected by the mode switching damper 29.

The intake damper 24 is driven by a motor actuator 33, the mix damper 27 is driven by a motor actuator 41, and the mode switching damper 29 is driven by a motor actuator 42. In addition, in FIG. 2, 44 to 48 are the motor actuator 33, the blower 25, the magnetic clutch 40, and the motor actuator 4, respectively.
1 and 42, respectively.

On the other hand, an interior air temperature sensor 50 is a vehicle interior temperature detection means for detecting the vehicle interior temperature, a solar radiation sensor 51 (having a photoelectric conversion element as a detection end) is a solar radiation amount detection means for detecting solar radiation, and an evaporator outlet. An evaporator outlet air temperature sensor 52 that detects the air temperature, that is, the temperature at point A; an outside air temperature sensor 53 that is an outside air temperature detection means that detects the outside air temperature;
A setting device 54, which is a vehicle interior temperature setting means for setting the vehicle interior temperature, and a potentiometer 55, which detects the opening degree of the mix damper, are provided. Output of each sensor, output of setting device 54 and potentiometer 5
The output of 5 is supplied to an A/D converter (hereinafter referred to as ADC) 57 via a multiplexer 56 and converted into digital data, and the digital data converted by the ADC 57 is sent to a microcomputer 58.
It is supplied to

The microcomputer 58 is basically a CPU,
It has a ROM that stores programs, a RAM that stores 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 sent to the CPU.
The data processed and calculated is outputted to the drive circuits 44 to 48 via the output ports, and is used to control the amount of air blown by the blower 25, the operating timing and period of the compressor controlled via the magnetic clutch 40, and the opening degree of the mix damper 27. Control is performed so that the temperature inside the vehicle is controlled by the setting device 54 as much as possible to the set temperature. Note that the description will be made assuming that the intake damper is manually designated to circulate internal air or take in external air.

The operation of the present invention will be explained with reference to the flowchart of FIG. 3 according to the program stored in the ROM.

When the program starts running, initial settings such as clearing the RAM are performed (step a).
Next, the outputs of the sensors 50 to 53, the output of the setting device 54, and the output of the potentiometer 55, which were converted into digital data via the input ports, are read and temporarily stored in a predetermined area of the RAM, and then the interior air temperature of the vehicle is read. A control signal (hereinafter referred to as integrated data) T=T _R +K ₁ T _E +K ₂ T _A +K ₃ S-K ₄ T _D +K ₅ is calculated and stored (step b). Here T _R
is the inside air temperature, T _E is the evaporator outlet air temperature,
T _A indicates the outside air temperature, and S indicates the amount of solar radiation, which are detected by the sensors 50 to 53. T _D is the set temperature set by the setting device 54, and K ₁ ~
_K5 is a constant. Therefore, the total data T is related to the deviation between the set vehicle interior temperature and the detected interior temperature,
Furthermore, the evaporator outlet air temperature T _E , the amount of solar radiation S,
Corresponds to the value corrected by the outside air temperature T _A ,
It can also be said to be a value related to the heat load for controlling the vehicle interior temperature to the set vehicle interior temperature.

Following step c, the total data T is corrected as described below (FIG. 5) (step c). below,
The corrected combined data will also be simply referred to as combined data.

Following step b, data T _F =T _E +K ₆ θ+β
is calculated and stored (step d). Here, θ indicates the opening degree of the mix damper 27, and all the air passing through the evaporator 26 is transferred to the heater core 2.
The opening degree when passing through 8 is θ = 100%
(full heat). 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 air blowing amount of the blower 25 is controlled according to the preset control pattern shown in FIG. 4a in accordance with the total data T (step e). Next, the opening degree of the mix damper 27 is controlled according to a control pattern that has been set in advance in accordance with the total data T as shown in FIG. The combined data T as shown in Figure 4c
(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. 4c, the magnetic clutch 40 is energized to drive the compressor 35, and when it is less than the temperature pattern shown in FIG. Compressor control is performed in which the magnetic clutch 40 is de-energized. The horizontal axes of FIGS. 4a, b and c are the combined 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 and/or the heat outlet 32 according to the data T _F (step h);
Following step h, step b is executed again. Note that the intake damper 24 is excluded from the flowchart in FIG. 3 because it is controlled to an outside air introduction state or an inside air circulation state according to the output of a manual switch (not shown) whose output is supplied to the microcomputer 58. .

The total data correction step c is executed as shown in FIG. In FIG. 5, T _S and T _S ' are correction values converted to the total data T and target correction values.

In the total data correction step c, a correction value T _S is added to the total data T, and the total data T is converted into a correction value.
Correct only T _S (step _c1 ). In step _c1 , it is checked whether the correction value T _S is equal to the correction target value T _S ' (step _c2 ). In step _c2 , it is determined whether there is a change in the amount of solar radiation S. Here, the correction target value T _S ' is a value obtained by multiplying the solar radiation amount S detected by the solar radiation amount sensor 51 by a constant K ₃ and converting it into integrated data T. For example, when solar radiation becomes intermittent, correction Since the target value T _S ' has a fast response speed, it changes as shown in FIG. 6a.

In step _c2 , the correction value T _S and the target correction value
When T _S ' are equal, flag γ is set following step c ₂ (step c ₃ ), and step d is executed. From step d onwards, the corrected combined data is used.

In step _c2 , the correction value _T3 and the target correction value
If T _S ′ is not equal, it is checked whether [target correction value T _S ′ > correction value T ₃ ] (step
_c4 ). When solar radiation begins to occur, that is, when the target correction value T _{S '} in _{FIG .} It is determined.

Following step _c4 , a flag γ is set (step _c5 ), and it is determined whether the outside air temperature is η degrees or higher (step _c6 ). When the outside air temperature is η degrees or higher, the process [T _S →(T _S +ΔT _S1 )] is performed, the correction value T _S is increased by ΔT _S1 (step c ₇ ), and step d is executed. Of course, the corrected combined data is used from step d onwards.

In addition, if the outside air temperature is less than η degrees in step c ₆ , following step c ₆ , [T _S ← (T _S + ΔT _S2 )]
Then, the correction value T _S is increased by ΔT _S2 (step c ₈ ), and step d is executed. Here, ΔT _S1 > ΔT _S2 is set.

Therefore, as mentioned above, steps c ₄ , c ₅ , c ₆ and
When going through route c ₇ , start from the time when sunlight starts to shine as shown in Figure 6 a and b, and then proceed to step c ₄ .
The correction value T _S is increased by ΔT _S1 each time the route from ~ _c7 is passed, and the correction value T _S increases stepwise at a slope corresponding to ΔT _S1 . In addition, in FIG. 6b, the stepwise shape is simplified and shown as a straight line. Also, when going through steps c ₄ , c ₅ , c ₆ and c ₈ , steps c ₄ to c 8 are used in the same way as above.
The correction value T _S is increased by ΔT _S2 each time the route c ₆ and c ₈ are passed, and the correction value T _S increases stepwise at a slope corresponding to ΔT _S2 . However, the former is a case where the outside air temperature T _A ≧η degrees, and the latter is a case where the outside air temperature T _A < η degrees, and ΔT _S1 > ΔT _S2 , so the increase in the correction value T _S is The former has a large slope, and the latter has a small slope. This state is shown in FIG. 6b by a solid line P for the former and a broken line Q for the latter.

The correction value T _S is increased as described above,
When the correction value T _S reaches the target correction value T _S ', steps c ₂ and c ₃ are routed.

In step _c4 , [target correction value T _S ′<correction value
When it is determined that T _S ], for example, the sunlight is blocked by clouds, there is no sunlight, and the target correction value T _S ' in Figure 6a is in a decreasing state. It is. When it is determined in step _c4 that [target correction value T _S '≦correction value T _S ], it is checked whether the flag γ is set (step _c9 ). If the flag γ is set in step _c9 , the timer starts counting (step _c10 ), the flag γ is reset (step _c11 ), and then a check is made to see if the set time t of the timer has elapsed. (step _c12 ). If the set time t has not elapsed in step _c12 , step d is executed following step _c12 .

If the set time t has elapsed in step _c12 , it is determined whether the outside air temperature is equal to or higher than η degrees following step _c12 (step _c13 ). When the outside temperature is η degrees or higher, the process [T _S → (T _S −ΔT _S1 )] is performed, the correction value T _S is decreased by ΔT _S1 (step c ₁₄ ), and step d is executed. .

Further, if the outside air temperature is less than η degrees in step _c13 , following step _c13 , [T _S ← (T _S −
ΔT _S2 )], the correction value T _S is decreased by ΔT _S2 (step c ₁₅ ), and step d is executed.

Therefore, when the solar radiation disappears from the state in which solar radiation was present as described above, the route of steps _c9 , _c10 , and _c11 is first passed, the flag γ is reset, and the timer starts counting. Then, if the timer set time t has not elapsed, steps c ₄ , c ₉ , c ₁₂ and step d are executed until the timer set time t has elapsed. 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 the time when there is no solar radiation. When the set time t of the timer has elapsed, step _c13 is executed following step _c12 .

If the outside air temperature is η degrees or higher in step _c13 , the routes of steps _c13 and _c14 are routed, and from the time the set time t has elapsed, steps _c13 and _c14 are carried out.
Each time the route is executed, the correction value T _S is decreased by ΔT _S1 , and the correction value decreases at a slope corresponding to ΔT _S1 . Furthermore, when the outside air temperature is less than η degrees, the correction value T _S is decreased by ΔT _S2 each time the routes of steps c ₁₃ and c ₁₅ are executed, and the correction value decreases at a slope corresponding to ΔT _S2 . become. However, since ΔT _S1 >ΔT _S2 , the former's decreasing slope is large, and the latter's decreasing slope is small. This state is shown in FIG. 6b by a solid line U for the former and a broken line V for the latter.

In addition, in the above-mentioned embodiments, ΔT _S1 and ΔΔT S2 when the correction value T _S increases and ΔT _{S1 and} ΔT _S2 when it decreases are made equal, but in the case of an increase and the case of a decrease, It may be made to be different. Furthermore, as shown in FIG. 6c, the correction start point may be delayed so that the broken line Q is indicated by a solid line P.

In addition, in the above embodiment, the time required to reach the target correction value is controlled in two stages by ΔT _S1 and ΔT _S2 depending on whether the outside air temperature is above or below a predetermined temperature. It can also be made to change.

(Effect of the invention) As explained above, according to the invention, when the amount of solar radiation increases, the vehicle interior air temperature control signal, that is, the combined data, is increased at a predetermined slope, and when the amount of solar radiation disappears, it is increased by a predetermined slope to the combined signal immediately before the reduction. It is maintained for a certain period of time, and when this predetermined period has elapsed, it is decreased at a predetermined gradient, so the change from presence of solar radiation to absence of solar radiation,
The timing at which the correction is applied for the change from nothing to presence is changed, and a good correction that matches the bodily sensation can be made.

Furthermore, since the predetermined slope is changed depending on the outside air temperature, the temperature inside the vehicle can be more precisely controlled to match the bodily sensations of the occupants.

[Brief explanation 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. 3 and 5 are flowcharts for explaining the operation of one embodiment of the present invention. FIG. 4 and FIG. 6 are diagrams for explaining the operation of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Vehicle interior temperature detection means, 2... Outside air temperature detection means, 3... Solar radiation detection means, 4... Vehicle interior temperature setting means, 5... Calculation means, 6... Correction means,
7...Temperature control means, 25...Blower, 26...
Evaporator, 27...Mitsu damper, 28...
... Heater core, 30 ... Vehicle interior, 35 ... Compressor, 33, 41 and 42 ... Motor actuator, 44 to 48 ... Drive circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) At least a vehicle interior air temperature detection means, an outside air temperature detection means, a solar radiation amount detection means for detecting the amount of solar radiation received by the vehicle, a vehicle interior temperature setting means, and the output of these detection means. and calculation means for calculating a vehicle interior temperature control signal based on the output of the vehicle interior temperature setting means, and a calculation means for calculating a vehicle interior temperature control signal based on the detected solar radiation amount before the change when the amount of solar radiation changes. and a correction means for changing the vehicle interior temperature control signal with a gradient accompanying the outside air temperature up to the vehicle interior temperature control signal calculated according to the detected amount of solar radiation, and the vehicle interior temperature control signal outputted from the compensation means. A vehicle air conditioner with solar radiation correction control, characterized in that a temperature adjustment means is controlled based on a temperature control signal. (2) A practical device characterized in that the correction means is means for sequentially adding or subtracting a predetermined value according to the outside air temperature to the cabin air temperature control signal calculated according to the detected amount of solar radiation before the change. A vehicular air conditioner with solar radiation correction control as claimed in claim 1. (3) The vehicular air conditioner with solar radiation correction according to claim 1, wherein the solar radiation amount detection means comprises a photoelectric conversion element.