JPH05310031A - Air conditioning device for vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] By cooling and heating the necessary parts by the required amount, it is possible to eliminate unnecessary energy consumption, improve cooling and heating efficiency, and improve fuel efficiency, as well as each seat due to uneven distribution of solar radiation. To eliminate the non-uniformity of the mutual temperature distribution. [Composition] Wind dampers 25, 26, 27, 28, 32
Is the deviation between the measured temperature and the set temperature measured by the temperature sensors 24a to 24d provided for the seats 22a to 22d by the control device 16 and the seat pressure sensors 23a to 23d.
Since it is controlled so as to match the optimal air distribution for each seat obtained based on the seating state of the occupant detected by 23d, the optimal amount of cool air or warm air is efficiently supplied to each of the seats 22a to 22d. It

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner.

[0002]

2. Description of the Related Art A conventional vehicle air conditioner is shown in FIG.

In FIG. 15, 1 is an outside air intake, 2 is an inside / outside air switching damper provided in the outside air intake 1, and 3 is a main duct whose one end is continuous with the outside air intake 1. In the main duct 3, A blower 4, an evaporator 5, an air mix damper (hereinafter referred to as A / M damper) 6 and a heater 7 are sequentially arranged, and the other end of the main duct 3 has a face duct 8,
It branches into a defroster duct 9 and a foot duct 10.

Each branch duct 8, 9, 1 of the main duct 3
Air outlet switching dampers 11 and 12 are provided at the 0 opening.

The vehicle body is provided with an outside air temperature measuring sensor 13, a solar radiation amount measuring sensor 14, and a room temperature measuring sensor 15 as sensors for controlling the air conditioning, and various information from these sensors controls the entire air conditioner. The data is transmitted to the control device 16 including a microcomputer.

In such a conventional controller 16, the control amount = A. (Ts-Tr) + B. (Ts-Tout) + C.SU.
It is general to perform the control represented by the formula of N 1.

Of these, A · (Ts-Tr) in the first term is set by the temperature setting device (not shown) provided on the air conditioning operation panel (not shown) and the room temperature measuring sensor 15. The deviation Ts-Tr from the measured room temperature Tr is multiplied by a predetermined constant A, and feedback control is performed so that the room temperature Tr converges to the set temperature Ts.

The second term B. (Ts-Tout) is the set temperature T
s and the outside air temperature To measured by the outside air temperature measurement sensor 13
The deviation Ts−Tout from ut is multiplied by a predetermined constant B, and C · SUN in the third term is the solar radiation measurement sensor 14
The solar radiation amount SUN measured by the above is multiplied by a predetermined constant C, and both are feedforward control terms.

[0009]

The conventional vehicle air conditioner as described above has the following problems. (1) Since only one room temperature measuring sensor 15 controls the air conditioning of the entire passenger compartment, depending on the direction of solar radiation with respect to the vehicle, for example, in the case of a passenger car, the driver's seat and passenger seat, the front seat and the rear seat,
Alternatively, there may be a difference in comfort level between the right seat and the left seat of the rear seats. (2) Fuel efficiency is poor because unnecessary parts such as seats not occupied by passengers are unnecessarily cooled or heated.

In view of the above-mentioned problems of the conventional technique, the present invention cools and heats a necessary portion by a necessary amount, thereby eliminating wasteful energy consumption, improving cooling and heating efficiency, and improving fuel consumption. It is an object of the present invention to provide an air conditioning system for a vehicle that can eliminate the uneven temperature distribution between the seats due to uneven distribution of solar radiation.

[0011]

In order to achieve the above object, the vehicle air conditioner of the present invention supplies air to each seat from a temperature sensor and cooling / heating means at a portion corresponding to a plurality of seats in the vehicle. And the air outlets of the foot ducts are provided for each of the seats, each seat is provided with a seat pressure sensor for detecting the presence or absence of an occupant, and the air distribution damper provided in each duct is controlled by the control device. The control device is based on the deviation between the set temperature set by the temperature setting device provided in the vehicle and the measured temperature measured by each temperature sensor, and the seated state of the occupant detected by the seat pressure sensor. It is characterized in that it is provided with a control function for controlling the air distribution damper so as to match the obtained optimum air distribution for each seat.

[0012]

The air distribution damper is optimal for each seat obtained by the control device based on the deviation between the set temperature and the measured temperature measured by each temperature sensor and the seating state of the occupant detected by the seat pressure sensor. Controlled to suit the air distribution, each seat is efficiently supplied with the optimal amount of cold or warm air. Therefore, it is possible to improve cooling and heating efficiency and improve fuel efficiency without imposing unnecessary energy consumption on the cooling and heating means, and to eliminate uneven temperature distribution among seats due to uneven distribution of solar radiation. You can

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. It should be noted that the same or similar components as those of the conventional one shown in FIG. 15 are denoted by the same reference numerals in the figure, and detailed description thereof will be omitted.

The embodiment shown in FIGS. 1 and 2 illustrates the present invention.
When applied to a passenger car, there are four seats inside the passenger compartment 21 of the vehicle 20, namely, a driver seat 22a, a passenger seat 22b, a rear right seat 22c, and A seat 22d, which is a rear left seat, is provided, and seat pressure sensors 23a to 23d that are activated by seating an occupant are provided on the seats 22a to 22d, respectively.

On the lower surface of the roof 21a of the vehicle 20, four temperature sensors 2 are provided instead of the conventional single room temperature measuring sensor 15.
4a to 24d are provided so as to be located directly above the seats 22a to 22d.

In the vehicle 20, cold or warm air,
A large number of air outlets for individually feeding the seats 22a to 22d are provided as follows.

That is, the face duct 8 is provided with a driver seat side air outlet 8a, a passenger seat side air outlet 8b, and a central air outlet 8c. The driver seat side air outlet 8a is provided at the center of the inside of the duct 8. A left / right air distribution damper 25 for the face is provided for adjusting the ratio of the air volume to the passenger seat side outlet 8b.

The foot duct 10 is a front seat duct 10a.
And the rear seat duct 10b, and at this branch,
A front and rear air distribution damper 26 is provided to adjust the ratio of the air volume to the front seat duct 10a and the rear seat duct 10b.

The tip of the front duct 10a is provided with a driver side outlet 10c and a passenger side outlet 10d. Inside the duct 10a, there are a driver side outlet 10c and a passenger side outlet 10d. A left and right air distribution damper 27 for the front seat is provided for adjusting the ratio of the air volume, and similarly, the tip of the rear seat duct 10b is provided with a rear right seat side outlet 10e and a rear left seat side outlet 10f. The left and right air distribution dampers 28 for the rear seat foot are also provided in the duct 10b for adjusting the ratio of the air volume to the rear right seat side outlet 10e and the rear left seat side outlet 10f.

The blower 4, the evaporator 5, the A / M damper 6, the heater 7, etc. shown in FIG.

Further, at the rear portion of the vehicle 20, there is provided rear cooling means 30 including a blower 4'and an evaporator 5 ', which are similar to the blower 4 and the evaporator 5 described above.

Rear seat duct 3 provided with rear cooling means 30
1, a rear right seat side air outlet 31a and a rear left seat side air outlet 31b are provided at the tip thereof to blow cold air upward and frontward along the rear window 21b. A rear seat left / right air distribution damper 32 is provided that adjusts the ratio of the air volume to the side air outlet 31a and the rear left seat side air outlet 31b.

Reference numeral 33 denotes a compressor, and the refrigerant compressed by the compressor 33 is distributed and supplied to the front evaporator 5 and the rear evaporator 5'via a refrigerant flow control valve 34. Reference numerals 35 and 35 ′ are air thermometers provided on the outlet side of the evaporators 5 and 5 ′, for detecting the temperature of the blown air and transmitting the temperature information to the control device 16.

Next, a control method by the control device 16 will be described.

The control device 16 controls the common equipment such as the cooling / heating means 29, the rear cooling means 30, the compressor 33, and the refrigerant flow control valve 34, and the outlet switching damper 1.
1, 12, various left and right air distribution dampers 25, 27, 28, 32
And an individual control function for controlling the front and rear air distribution damper 26.

The control of the common equipment is actually complicated and diversified, but the basic control principle is as follows. (1) Keeping the evaporator discharge temperature constant by controlling the compressor 33 based on the evaporator outlet temperature measured by the air thermostats 35 and 35 ′ and the outside air temperature measured by the outside air temperature measurement sensor 13, Easy to control. (2) Based on the outside air temperature and the amount of solar radiation measured by the solar radiation amount measuring sensor 14, various air outlets 8a to 8c, 10c to 1
By controlling the operations of 0f, 31a, 31b and the rear blower 4 ', the interior of the passenger compartment 21 is fixed to a predetermined flow field, and the temperature field of each part in the four seats and various sensors are well corresponded. (3) The set temperature set by the temperature setting device 36 provided in the vehicle 20 and the temperature sensor 2 for each seat 22a to 22d
The opening of the A / M damper 6 and the air volumes of the blowers 4 and 4'are controlled by the deviation from the measured temperatures of 4a to 24d, and the passenger compartment 21
Performs average control over the whole.

Next, the basic control principle of the individual control is as follows. (4) The size of the deviation between the set temperature set by the temperature setting device 36 and the measured temperature of each of the temperature sensors 24a to 24d is compared, and the air distribution damper 25 is arranged to increase the air volume to the seat with the large deviation. , 26, 27, 28, 32 are controlled. (5) Seat pressure sensors 23a to 23d are used to seat each seat 22a.
The presence / absence of an occupant at 22d is detected, and depending on the presence / absence, that is, the seating state, each of the deviations described above is, for example, 1 or 0.2
And so on.

Next, specific control examples will be described with reference to FIGS.
4 will be described.

When the air conditioner of the vehicle is operated, the main routine shown in FIG. 3 is repeated every predetermined control cycle. First, at step M1, the outside air temperature measuring sensor 13, the solar radiation amount measuring sensor 14, the seat pressure sensor. Various signals are input from 23a to 23d, temperature sensors 24a to 24d, air thermos 35 and 35 ', a temperature setting device 36, and a manual switch (not shown) incorporated in the air conditioner.

In step M2, according to the procedure shown in FIG. 4, the seats 22a set by the temperature setting device 36,
Set temperature Ts ^FR , Ts ^FL , T for each of 22b, 22c, 22d
s ^RR , Ts ^RL (° C) and temperature sensors 24a, 2 for each seat
4b, 24c, 24d measured temperatures Tr ^FR , Tr ^FL , T
With r ^RR and Tr ^RL (° C), the deviation E ₁ ^FR , E ₁ ^FL in each seat,
E ₁ ^RR and E ₁ ^RL are calculated and the seat pressure sensor 23
Based on the seating states detected by a, 23b, 23c, and 23d, the weight values W are applied to the deviations E ₁ ^FR , E ₁ ^FL , E ₁ ^RR , and E ₁ ^RL.
₁ ^FR , W ₁ ^FL , W ₁ ^RR , W ₁ ^RL or W ₂ ^FR , W ₂ ^FL , W ₂ ^RR ,
Weighting is performed by the presence or absence of an occupant by multiplying by W ₂ ^RL . That is, when there is an occupant, the weight value W ₁ = W ₂
= 1, and if there is no passenger, the weight value W ₁ = 0.2, W
₂ = 0.5. Then, the weighted deviation E ₂ ^FR ~
From E ₂ ^RL and E ₃ ^FR ~E ₃ ^RL, deviation between the driver's seat and the deviation _{^{ΔE F (= E 2 FR -E}} 2 FL) between the passenger seat, rear right seat and a rear left seat _{^{ΔE R (= E 2 RR -E}} 2 RL), the deviation ΔE (= E ^F -E ^R) between the front seat and the rear seats, the passenger compartment 21 total deviation E, the maximum value maxE and minimum the deviation Set the value minE.

In step M3, the outside air temperature T measured by the outside air temperature measuring sensor 13 according to the routine shown in FIG.
Based on out (° C.) and the solar radiation amount SUN (Kcal / m ² · h) measured by the solar radiation amount measuring sensor 14, the intake port of the air conditioner is set to either internal air circulation or external air introduction.

In step M4, the outside air temperature T measured by the outside air temperature measuring sensor 13 according to the routine shown in FIG.
Based on out and the solar radiation amount SUN measured by the solar radiation amount measuring sensor 14, the blower outlet switching damper 1 is controlled so as to control the air blow to the face duct 8 and the foot duct 10.
1 and 12 are switched and operated.

In step M5, as shown in FIG. 6, the blower 4'of the rear cooling means 30 is controlled to be turned on and off in association with the above-described blowout port switching operation.

In step M6, according to the routine shown in FIG. 7, in accordance with the switching position of the air conditioner switch (A / C SW) not shown, that is, the auto position or the dry position,
Outside temperature Tout measured by outside temperature measurement sensor 13
And the solar radiation amount SU measured by the solar radiation amount measurement sensor 14.
Based on N and the upper limit value U of the blowing temperature of the evaporators 5 and 5 '
L and the lower limit value LL are set as shown in FIG.

In step M7, in accordance with the routine shown in FIG. 9, the operating condition of the rear blower 4 ', the outlet temperature Tev of the evaporator 5 of the cooling / heating means 29 measured by the air thermostat 35.
From the compressor 33 to the evaporator 5 of the cooling / heating means 29, based on the outlet temperature Teva ^R (° C) of the evaporator 5'of the rear cooling means 30 measured by a ^F (° C) and the air thermostat 35 '.
The operation of the refrigerant flow rate control valve 34 is controlled so as to control the supply of the refrigerant to the front flow path communicating with the rear flow path communicating from the compressor 33 to the evaporator 5 ′ of the rear cooling unit 30.

In step M8, according to the routine shown in FIG. 10, the compressor 33 is controlled to be turned on and off based on the operation of the refrigerant flow control valve 34, that is, the open / closed state of the front flow passage and the rear flow passage.

In step M9, in accordance with the routine shown in FIG. 11, the command value for determining the opening of the A / M damper 6 and the air volumes of the blowers 4, 4'are determined by the deviation value E obtained in step M2 and the outside air temperature. It is calculated from the following equation based on Tout and the amount of solar radiation SUN. Command value = AE * B * Tout + C * SUN + D Here, A, B, C, and D are predetermined constants.

Next, at step M10, as shown in FIG. 11, the value of the A / M damper opening corresponding to the command value is obtained based on a preset map, and the opening of the A / M damper 6 is calculated. To control.

Further, in step M11, as shown in FIG. 11, the value of the blower air volume corresponding to the command value is obtained based on a preset map.

Then, in step M12, as shown in FIG. 11, the deviation value E and the deviation value Δ obtained in step M2 are calculated.
Based on the magnitude of E, while obtaining the added value from these deviation values E, ΔE, the maximum value maxE and the minimum value minE of the deviation, the air volumes of the blower 4 of the cooling and heating means 29 and the blower 4'of the rear cooling means 30 are respectively calculated. Control. In addition, F and K in FIG. 11 are predetermined constants.

In step M13, the deviation values ΔE ^F , ΔE ^R , obtained in step M2 are calculated according to the routine shown in FIG.
Based on ΔE, E, the maximum value maxE and the minimum value minE of the deviation, the face left and right air distribution dampers 25 and the front and rear air distribution dampers 25 are provided so as to obtain the optimum air volume distribution for each seat as shown in FIGS. 13 and 14. 26, left and right air distribution dampers 27 for front seat foot,
The left / right air distribution damper 28 for the rear seat foot and the left / right air distribution damper 32 for the rear seat are controlled.

The above-mentioned operation is performed when the manual switch is turned off and the air conditioner is turned on automatically. However, when the manual switch is turned on, the operation in steps M3 to M8 described above is performed. Indicates that manual operation is prioritized, and manual operation is prioritized also in the air volume setting in steps M9 to M12.

[0043]

According to the present invention, the optimum air distribution for each seat is obtained based on the temperature of each seat and the seating condition of the occupant, and various air distribution dampers are controlled based on the optimum air distribution. In addition, it is possible to heat and cool only the necessary parts in the required amount, improve the cooling and heating efficiency by eliminating wasteful energy consumption, improve fuel efficiency, and avoid the temperature distribution between seats due to uneven distribution of solar radiation. Uniformity can be eliminated.

[Brief description of drawings]

FIG. 1 is a schematic side view of a vehicle showing a vehicle air conditioner of the present invention.

FIG. 2 is a schematic plan view of FIG.

FIG. 3 is a flowchart showing a control flow of the entire air conditioner.

FIG. 4 is a flowchart showing a procedure for setting a deviation between a set temperature and a measured temperature.

FIG. 5 is a flowchart showing a procedure for setting a suction port.

FIG. 6 is a flowchart showing a procedure for setting an outlet and controlling a rear blower.

FIG. 7 is a flowchart showing a procedure for setting an upper limit value and a lower limit value of the air thermostat.

FIG. 8 is a diagram showing a relationship between an outside temperature and an upper limit value and a lower limit value of an air thermometer.

FIG. 9 is a flowchart showing a control procedure of a refrigerant flow path.

FIG. 10 is a flowchart showing a control procedure for turning the compressor on and off.

FIG. 11 is a flowchart showing a procedure for setting an A / M damper opening degree and an air volume.

FIG. 12 is a flowchart showing a control procedure of the air distribution damper.

FIG. 13 is a diagram showing a relationship between deviation values ΔE ^F and ΔE ^R and air volume distribution.

FIG. 14 is a diagram showing a relationship between a deviation value ΔE and air volume distribution.

FIG. 15 is a schematic side view showing an example of a conventional vehicle air conditioner.

[Explanation of symbols]

 1 Outside air intake 2 Inside / outside air switching damper 3 Main duct 4, 4'Blower 5, 5 'Evaporator 6 Air mix damper (A / M damper) 7 Heater 8 Face duct 8a, 10c Driver side air outlet 8b, 10d Passenger seat side outlet 8c Central outlet 9 Defroster duct 10 Foot duct 10a Front seat duct 10b Rear seat duct 10e, 31a Rear right seat side outlet 10f, 31b Rear left seat side outlet 11 and 12 Switching damper 13 Outside air temperature measurement sensor 14 Solar radiation amount measurement sensor 16 Control device 16a Main control device 16b Individual control device 20 Vehicle 21 Vehicle compartment 21a Roof 21b Rear window 22a-22d Seat 23a-23d Seat pressure sensor 24a-24d Temperature sensor 25 Face Left / right air distribution damper 26 Front / rear air distribution damper 27 Left for front seat foot Air distribution damper 28 rear seat foot right and left air distribution damper 29 Air means 30 rear cooling means lateral air distribution for the rear seat duct 32 after the seat 31 damper 33 compressor 34 the refrigerant flow control valves 35, 35 'Easamo 36 temperature setting device

Claims (1)

[Claims] 1. A temperature sensor and a face and a foot duct outlet for supplying air from the cooling and heating means to each seat are provided in a portion corresponding to a plurality of seats in the vehicle, and each seat is provided with: A seat pressure sensor for detecting the presence or absence of an occupant is provided, and a ventilation device provided in each duct is controlled by a control device, and the control device is set by a temperature setting device provided in the vehicle. The air distribution damper is controlled to suit the optimum air distribution for each seat, which is determined based on the deviation between the temperature and the temperature measured by each temperature sensor and the seating condition of the occupant detected by the seat pressure sensor. An air conditioner for a vehicle, which is provided with a control function for controlling.