JP2658046B2 - Vehicle air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an air conditioner for a vehicle.

(Prior Art) Conventionally, in an air conditioner of this type, for example, as disclosed in Japanese Patent Application Laid-Open No. 61-232912, a deviation of an actual temperature in a vehicle compartment from a desired set temperature with time is known. And the amount of heat of the airflow into the vehicle compartment is controlled in accordance with the result of the integration so that the actual temperature approaches the set temperature.

(Problems to be Solved by the Invention) However, in such a configuration, when sunlight enters the interior of the vehicle through the window of the vehicle, the temperature of the interior of the vehicle is averagely controlled by the above-described heat amount control. Despite being properly maintained, the occupant has a problem that he / she feels uncomfortable with the air conditioning in the passenger compartment due to an increase in body temperature due to the solar radiation.

Therefore, the present invention addresses such a problem,
Air conditioning for passenger compartments that performs proper air conditioning by correcting the deviation between the actual temperature in the passenger compartment and the set temperature with good followability in accordance with the change in the actual amount of solar radiation entering the passenger compartment It is intended to provide a device.

(Means for Solving the Problems) In order to solve the above problems, the configuration of the present invention is, as shown in FIG. 1, a temperature detecting means 1 for detecting an actual temperature in a vehicle cabin.
And solar radiation detecting means 2 for detecting the amount of solar radiation entering the vehicle interior
Temperature setting means 3 for setting a desired temperature in the passenger compartment as a set temperature; deviation determining means 4 for determining a deviation between the actual temperature and the set temperature; and determining the determined deviation according to the amount of solar radiation. Correction means 5 for correcting the value to increase, integration means 6 for integrating the correction value by the correction means, supply for controlling the amount of heat of the air flow to be supplied into the vehicle compartment 1a according to the integration value by the integration means The heat quantity control means 7 is provided.

(Operation and Effect) With the configuration of the present invention, when the deviation between the actual temperature and the set temperature is determined by the deviation determining unit, the determined deviation increases by the correcting unit in accordance with the amount of solar radiation. Will be corrected. Next, the correction value obtained by the correction means is integrated by the integration means. Then, the amount of heat of the air flow to be supplied to the vehicle interior is determined according to the integrated value by the integrating means.
It is controlled by the supplied heat amount control means.

As described above, since the deviation between the actual temperature and the set temperature is increased and corrected according to the amount of solar radiation and integrated, the calorie control of the supply air flow is performed according to the integrated value when the amount of solar radiation is not present. It is made bigger than. As a result, control is performed so that the actual temperature becomes lower than the set temperature. Thereby, a comfortable air-conditioning feeling can always be given to the occupant without causing the occupant's body temperature to rise due to the solar radiation.

In this case, as described above, the correction value obtained by correcting the determined deviation with the amount of solar radiation is integrated, and then given to the supplied heat quantity control means. In other words, every time the deviation is determined, the deviation is applied to the supplied heat amount control means after being subjected to an integration process that is sequentially corrected with the actual amount of solar radiation.
Therefore, even if the amount of solar radiation suddenly changes, the correction is made with good responsiveness following this sudden change. This means that the comfortable air-conditioning feeling can be obtained with good followability even when the amount of solar radiation changes suddenly.

When the amount of solar radiation is substantially zero, the correction value substantially matches the deviation, so that the calorific value control by the supplied calorific value control means is performed such that the actual temperature is set to the set temperature. You. Therefore, when sunlight does not enter the passenger compartment, a comfortable air-conditioning feeling can always be given to the occupant at the set temperature.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows an example in which a cooling device according to the present invention is applied to a bus vehicle 10. This cooling device includes an air duct 20 arranged on the ceiling of the bus vehicle 10, and the air duct 20
Inside the evaporator 20, both evaporators 30, 40 are arranged symmetrically with respect to the traveling direction of the bus vehicle 10, and both blowers 50,
60 is provided in each downstream of the evaporators 30 and 40, respectively. The evaporator 30 exhibits a cooling function in response to the selective drive of the compressor 31. Compressor 31
In response to the engagement (or disengagement) of the electromagnetic clutch 31a, the power from the engine of the bus vehicle 10 is transmitted (or cut off) to drive (or stop). The blower 50 rotates in response to the drive of the blower motor 51, and introduces air in the vehicle compartment from the central inlet 21 through the evaporator 30 into the air duct 20 according to the rotation speed, and from the left outlet 22 of the air duct 20. It blows out into the cabin of the bus vehicle 10. The evaporator 40 exhibits a cooling function in response to the selective drive of the compressor 41. The compressor 41 is driven (or stopped) by transmitting (or shutting off) power from the engine in response to engagement (or disengagement) of the electromagnetic clutch 41a. The blower 60 rotates in response to the drive of the blower motor 61, and introduces the air in the vehicle compartment from the central inlet 21 into the air duct 20 through the evaporator 40 in accordance with the rotation speed, and from the right outlet 23 of the air duct 20. Blow out into the cabin. In FIG. 2, reference numerals 11 and 11 denote left and right wheels of the bus vehicle 10, respectively.

The cooling device includes a pair of internal temperature sensors 70a and 70b,
A pair of solar radiation sensors 71a, 71b and a pair of outlet temperature sensors 72a, 7
2b. The internal air temperature sensor 70a is provided inside the upper part of the left seat in the passenger compartment of the bus vehicle 10, and detects the temperature at the location where the internal air temperature sensor 70a is disposed and generates it as a left internal air temperature detection signal. I do. On the other hand, the inside air temperature sensor 70b is provided inside the upper part of the right seat in the passenger compartment of the bus vehicle 10, and the inside air temperature sensor 70b detects the temperature at the location where the inside air temperature sensor 70b is disposed and outputs a right inside air temperature detection signal. Occurs as The solar radiation sensor 71a is disposed on the inner side of the lower edge of the left window of the bus vehicle 10, and the solar radiation sensor 71a detects sunlight incident on the arrangement position through the left window and outputs a left solar radiation detection signal. Occurs as On the other hand, the solar radiation sensor 71b is provided inside the lower edge of the right window of the bus vehicle 10, and the solar radiation sensor 71b detects sunlight entering the location where the solar vehicle passes through the right window to detect the right solar radiation. Generated as a detection signal.

The blowout temperature sensor 72a detects the temperature of the blown airflow from the left blowout port 22 of the air duct 20 and generates a left blowout temperature detection signal. On the other hand, the outlet temperature sensor 72b is connected to the air duct 2
The temperature of the airflow blown out from the right outlet 23 is detected as a right blowout temperature detection signal. The AD converter 73 is
Each internal air temperature detection signal from both internal air temperature sensors 70a, 70b, each solar radiation detection signal from both solar radiation sensors 71a, 71b, and each outlet air temperature detection signal from both outlet air temperature sensors 72a, 72b are left internal air temperature digital signals, They are converted into an internal air temperature digital signal, a left solar radiation digital signal, a right solar radiation digital signal, a left outlet temperature digital signal and a right outlet temperature digital signal, respectively. The temperature setting device 80 sets a desired temperature in the vehicle interior and generates a temperature setting digital signal.

The microcomputer 90 executes the computer program stored in the ROM in advance in accordance with the flowcharts shown in FIGS. 3 to 5 in cooperation with the A / D converter 73 and the temperature setting device 80. In the inside, arithmetic processing necessary for controlling the blower motor driving circuits 101 and 102 and the compressor driving circuits 103 and 104 is performed. Blower motor drive circuit
101 drives the blower motor 51 under the control of the microcomputer 90. The blower motor drive circuit 102 drives the blower motor 61 under the control of the microcomputer 90. The electromagnetic clutch drive circuit 103 selectively engages the electromagnetic clutch 31a of the compressor 31 under the control of the microcomputer 90. Electromagnetic clutch drive circuit 104
Selectively engages the electromagnetic clutch 41a of the compressor 41 under the control of the microcomputer 90.

In this embodiment configured as described above, when the device of the present invention is operated in the engine operating state, the microcomputer 90 starts the computer program from step 200 according to the flowchart of FIG. = 0, TRo = 0, and count value n = 1.
Then, the microcomputer 90, at step 202, the value on the left in the temperature digital signal from A-D converter 73 (hereinafter, referred to as the left side in the air temperature value Tr _l), the value of the right in the temperature digital signal (hereinafter, right Internal temperature value Trr), left solar radiation digital signal value (hereinafter left solar radiation amount _Hl ), right solar radiation digital signal value (hereinafter right solar radiation amount)
That Hr), the value of the left outlet temperature digital signal (hereinafter, referred to as the left outlet temperature value the To _l), the value of the right outlet temperature digital signal (hereinafter, respectively store) that the right outlet temperature value Tor, and temperature setter The value of the temperature setting digital signal from 80 (hereinafter referred to as a set temperature value Tset) is stored.

When the computer program proceeds to the calculation routine 203 of the reference variable YL, the microcomputer 90 executes the following equations (1), (2), and (3) in steps 203b, 203c, and 203d according to the flowchart of FIG. the basis count value n = 1 in step 201, the storage variable TLO = 0, left in air temperature value Tr _l in step 202, the left insolation H _l, deviation data eLn based on the setting temperature value Tset, integrated data Ln, deviation integral data Calculate A.

_{eLn = Tr l - (Tset-} H l) ...... (1) Ln = TL n-1 + eLn ...... (2) A = eLn + ZxLn ...... (3) where sign Z in the formula (3) represents the integration constant .
The equations (1) to (3) are equivalent to the microcomputer 90
Is stored in advance in the ROM.

If A obtained by the equation (3) satisfies 0 <A <4, the microcomputer 90 performs both steps.
In steps 203e and 203f, it is sequentially determined to be "YES". In step 203g, the accumulated variable TLn is calculated according to the following equation (4).
At h, the left reference value YL is calculated according to the following equation (5).

TLn = TLn _-1 + eLn (4) YL = eLn + ZxLn (5) However, each of the equations (4) and (5) is a microcomputer 90.
Is stored in advance in the ROM.

Then, when the computer program proceeds to step 204 (see FIG. 3), the microcomputer 90, based on V _l -YL data representing the relationship between the reference values YL and left blowout flow V _l (see FIG. 6) step 203h together also determines the left blowout flow V _l corresponding to the reference value YL of steps based on Delta] t _l -YL data representing the relationship between the reference values YL and left required temperature difference Delta] t _l (see FIG. 7) 203h Reference value YL in
The required left-side temperature difference Δt _l is determined according to In such a case, the left blowout flow V _l is equivalent to the blowout of air flow from the left outlet 22 of the air duct 20, the left blowout flow V _l is, as shown in FIG. 6, the reference value It changes in proportion to YL. Further, as shown in FIG. 7, the required left-side temperature difference Δt ₁ becomes 0 when the reference value YL = 0, and is proportional to the reference value YL. However, both the V _l -YL data and the Δt _l -YL data are stored in the ROM of the microcomputer 90 in advance. Then, the microcomputer 90 performs the next step.
At 205, it generates a left blowout flow V _l in step 204 as a first blower motor control signal to rotate the blower motor drive circuit 101 in response at a rate corresponding to the blower motor 51 to the left blowout flow V _l to , evaporator air duct 20 in the blower 50 is the left blowout flow V _l
An airflow is introduced through 30 and blows out from the left outlet 22 toward the left side of the passenger compartment.

At this state, blowout temperature of the stored left outlet temperature value the To _l from the air outlet 22 at step 202, (i.e., by subtracting the left required temperature difference Delta] t _l in step 204 from the left side in the air temperature value Tr _l Upper limit of allowable temperature (eg, Tr _l
−Δt _l +0.5). Then, after the microcomputer 90 determines “NO” based on YL in step 230h in step 206, the microcomputer 90 determines “N” in step 207.
"O" is determined, "YES" is determined in step 208, and a first engagement signal is generated in the next step 208a. Next, when the electromagnetic clutch drive circuit 103 engages the electromagnetic clutch 31a in response to the first engagement control signal from the microcomputer 90, the compressor 31 is driven and the evaporator is driven.
30 exerts its cooling action. If the determination in step 207 is “YES”, the microcomputer 90
However, since the first engagement control signal is extinguished in step 207a, the electromagnetic clutch drive circuit 103 stops the compressor 31 under the disengagement of the electromagnetic clutch 31a.

Thus, in step 203b, since so as to calculate the deviation eLn to the difference between the real left in air temperature Tr _l and the set temperature Tset by adding the left insolation H _l, the occupant sitting on the left seat insolation As a result, the airflow blows toward the left seat at a flow rate that is increased and corrected in accordance with the rise in the perceived temperature, and as a result, a comfortable cooling effect can always be ensured without incurring the rise in the perceived temperature of the occupant due to sunlight. .

In this case, the deviation data eLn is proportionally integrated under the proportional integration in each of the steps 203c to 203h, and the airflow blown to the left seat is controlled based on the result.

In other words, the difference between the left inside air temperature and the set temperature is successively corrected with the actual amount of solar radiation, and proportional integral control is performed, for each process of performing the proportional integration process in each of steps 203c to 203h. Therefore, even if the amount of solar radiation suddenly changes, the above correction is made with good responsiveness following this sudden change. This means that even if the amount of solar radiation changes suddenly, the comfortable cooling effect can be ensured with good followability under the above-mentioned proportional integration process.

Thereafter, when the computer program proceeds to the operation routine 209 (see FIG. 5) for the reference value YR, the microcomputer 90 performs substantially the same operation as in the case of the operation routine 203. In this case, assuming that the right side solar radiation amount Hr = 0, the microcomputer 90 calculates the following formulas (6) to
Based on (8), the actual right inside temperature Trr and set temperature Tset
Is calculated as the deviation eRn, and the integral data Rn and the deviation integral data B are calculated.

eRn = Trr−Tset + Hr (6) Rn = TR _n−1 + eRn (7) B = eRn + ZRn (8) Thus, when 0 <B <4, the microcomputer
90 calculates the accumulation variable TRn and the reference value YR based on the following equations (9) and (10).

TRn = TRn _-1 + eRn (9) YR = eRn + ZxRn (10) Then, the microcomputer 90 determines in step 210 that Vr represents the relationship between the right-side required blow flow rate Vr and the reference value YR.
Based on the YR data (see FIG. 6), the right-side required flow rate Vr is determined according to the reference value YR, and the right-side required temperature difference Δ
Based on the reference value YR based on the Δtr−YR data (see FIG. 7) representing the relationship between tr and the reference value YR, the right-side required blowing temperature difference Δtr
To determine. In such a case, each of the formulas (6) to (10), Vr-YR
Data and Δtr-YR data are both microcomputers
It is stored in the ROM of 90 in advance. Incidentally, Vr-YR data and? Tr-YR data, respectively, V _l -YL data and Delta] t _l
-Defined similarly to YL data.

Then, the microcomputer 90 executes step 211
In the above, the required flow rate Vr on the right side determined as described above
Generated as a blower motor control signal.
Driven under the rotation speed of the blower motor 61 corresponding to the value of the blower motor control signal, the airflow is introduced into the air duct 20 through the evaporator 40 with the required right-hand blowout flow rate Vr, and is blown from the right-side blowout port 23 to the right side of the vehicle compartment. put out. Further, the compressor 41 is connected to each step 206 of the microcomputer 90.
Steps 212 to 2 substantially similar to the calculation in steps 208 to 208a
The evaporator 40 is selectively driven by the calculation in 14a to exhibit the cooling capacity.

Thus, Hr = 0 be determined not with no correction of the solar radiation Hr deviation eRn when the right outlet flowrate Vr is reduced by the amount corresponding to the amount of sunlight H _l from the left outlet flow rate as described above. Therefore, under the proportional integral calculation control in the calculation routine 209, the occupant in the right seat is placed in a comfortable air-conditioning state controlled at a higher temperature than in the case of the occupant in the left seat. This means that the air conditioning control in the vehicle interior is independently and appropriately performed in the left seat and the right seat according to the presence or absence of solar radiation.

Other operational effects in the proportional integral operation control in the operation routine 209 are the same as those in the proportional integral operation control in steps 203c to 203h.

If the determination in step 203f is “NO”, the microcomputer 90
n = TL _n-1 is updated, and YL = 0 is set in the next step 203j. When the determination in step 203e is “NO”, the microcomputer 90 determines in step 203k that TLn = TL _n−1
Update and sets the YL = 4 at the next step 203 _l. The same applies to the steps corresponding to each step 203I～203 _l arithmetic routine 209. After the calculation of the calculation routine 209, the microcomputer 90 updates n = n + 1 in step 215, and
After a second delay, the computer program returns to step 202.

In the above-described embodiment, the bus vehicle 10 is divided into left and right parts to perform the cooling control.
The bus vehicle 10 may be divided into front and rear, and may be further divided into front and rear and left and right for cooling control.

Further, in the above-described embodiment, an example in which the present invention is applied to a bus vehicle has been described. Alternatively, the present invention may be applied to a passenger car.
Inside air sensor, solar radiation sensor, blower, evaporator, etc.
You may implement by using only a group.

Further, in the above-described embodiment, an example in which the present invention is applied to a cooling device is shown. However, the present invention is not limited to this, and the present invention may be applied to an air conditioner also having a cooling capacity.

In the practice of the present invention, both solar radiation sensors 71a,
One of the air temperature sensors 70a and 70b is provided at one of the center temperatures of the bus vehicle, and one of the air temperature sensors 70a and 70b is omitted.
Similarly, one of them may be provided at an appropriate place, and the other may be omitted from the internal temperature sensor.

[Brief description of the drawings]

FIG. 1 is a diagram corresponding to the configuration of the invention described in the claims, FIG. 2 is an overall view showing an embodiment of the present invention, and FIGS.
Figure 5 is a flow chart showing the operation of the microcomputer of FIG. 2, FIG. 6 is a characteristic diagram representing a V _l -YL data and Vr-YR data, and FIG. 7 is Delta] t _l -YL data and Δ
FIG. 9 is a characteristic diagram illustrating tr-YR data. Description of symbols 10: Bus vehicle, 20: Air duct, 30, 40: Evaporator, 31, 41: Compressor, 50, 60: Blower, 51, 61: Blower motor, 70a, 70b: Internal temperature sensor , 71a, 71b ... solar radiation sensor, 80 ... temperature setting device, 90 ... microcomputer, 101-104 ... drive circuit.

Claims (1)

(57) [Claims] 1. A temperature detecting means for detecting an actual temperature in a vehicle interior of a vehicle, a solar radiation detecting means for detecting an amount of solar radiation entering the vehicle interior, and a temperature for setting a desired temperature in the vehicle interior as a set temperature. Setting means; deviation determining means for determining a deviation between the actual temperature and the set temperature; correcting means for correcting the determined deviation to increase in accordance with the amount of solar radiation; and correcting the correction value by the correcting means. An air conditioner for a vehicle, comprising: an integrating means for integrating; and a supply calorie control means for controlling a calorific value of an air flow to be supplied to a vehicle interior according to an integral value by the integrating means.