JPS62299420A - Controller for vehicle air-conditioner - Google Patents

Abstract

PURPOSE:To improve the comfortability immediately after getting on by detecting the temperature of the suit of a crew then determining the target temperature of supply air based upon a temperature setting signal, an inside temperature detection signal and a suit temperature detection signal. CONSTITUTION:The temperature of the suit of a crew seated in a seat R2 is detected through a pyroelectric sensor 25 together with an inside temperature 22, an outside temperature 23, a sunshine sensor 24 and a setting temperature 21, then they are fed through an A/D converter 26 to a microcomputer 27. The microcomputer 27 operates a target temperature of supply air based upon said input temperature signals 27-25. Based upon said target level, a target opening of an air mix damper 15 is determined so as to determine an inner/outer air switching mode, an air flow and an air supply port switching mode thus controlling the air mix damper 15 through a drive mechanism 28. With such arrangement, the comfortability can be improved immediately upon getting on.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a vehicle air conditioner, and particularly relates to a method for blowing out an air flow from an air duct of the air conditioner into a vehicle interior. The present invention relates to a control device that controls temperature to maintain an appropriate temperature in a vehicle interior.

[Prior art]

Conventionally, in this type of control device, for example,
As disclosed in Japanese Patent No. 7-138411, in determining the target value of the temperature of the air flow blown into the vehicle interior,
It is common practice to take into account the desired temperature in the vehicle interior and the actual temperature in the vehicle interior.

[Problem that the invention seeks to solve]

However, in such a configuration, immediately after the air conditioner starts, the blowout temperature of the airflow is controlled so that the actual temperature in the passenger compartment transiently overshoots the desired temperature. Although the temperature inside the cabin is designed to match the temperature sensation of the occupants, the temperature of the occupant's clothing changes even if the temperature of the occupant's clothing changes when the occupant enters the vehicle after the air conditioner enters a steady control state. Since the blowout temperature of the airflow is determined regardless of the temperature, there is a problem in that the occupants are given a transient feeling of insufficient heating in the winter and a transient feeling of insufficient cooling in the summer.

To deal with this, for example, as disclosed in Japanese Utility Model Application Publication No. 58-104717, the body surface temperature of the occupant is detected and the temperature at which the airflow is blown is determined by taking this detection result into consideration. However, it is said that the body surface temperature of an occupant often does not match the thermal sensation of the occupant due to the influence of the occupant's clothing temperature, and there is large variation in the thermal sensation of the individual. There's a problem. Also,
As disclosed in Japanese Unexamined Patent Publication No. 60-92919, the environmental conditions of the vehicle interior are detected, and the human body is adjusted based on preset thermal characteristic values of the seat, amount of clothing, etc., according to the detection results. Some devices have been designed to control the blowout temperature of the airflow so that the skin temperature of the person is 33.5℃, but if the temperature of the clothes changes significantly, the same problem as mentioned above will occur. It will be done.

Therefore, in order to deal with the above-mentioned problems, the present invention effectively utilizes the temperature of the occupant's clothes in a vehicle air conditioner to control the temperature of the airflow blown into the vehicle interior immediately after the occupant gets into the vehicle. It is an object of the present invention to provide a control device that performs appropriate control.

[Means for solving problems]

In solving this problem, the structural features of the present invention are as follows:
As shown in FIG. 1, the air conditioner is applied to an air conditioner equipped with a temperature control member 1 disposed in an air duct of a vehicle and adjusting the temperature of the air flow blown out from the air duct into the vehicle interior according to displacement. , a temperature setting means 2 which generates the desired temperature as a temperature setting signal when the desired temperature inside the vehicle is set; and an indoor temperature detection means which detects the actual temperature inside the vehicle interior and generates the same as an indoor temperature detection signal. 3, target value determining means 4 for determining the target value of the outlet temperature according to the temperature setting signal and the room temperature detection signal and generating it as a target outlet temperature signal, and adjusting the temperature adjusting member 1 to the value of the target outlet temperature signal. and a driving means 5 for displacing the occupant to a corresponding position, the clothing detecting means detecting the actual temperature of the clothing of the passenger when the passenger is seated on the seat in the vehicle interior, and generating a clothing temperature detection signal. 6, the target value determining means 4 determines the target value of the blowing temperature according to the temperature setting signal, the room temperature detection signal, and the clothing temperature detection signal.

[Effect]

By configuring the present invention in this way, when the occupant gets on the vehicle and sits on the seat, the clothing detection means 6 generates the actual temperature of the occupant's clothing as a clothing temperature detection signal, and A value determining means 4 determines a target value of the blowing temperature by taking into account the clothing temperature detection signal in addition to the temperature setting signal and the room temperature detection signal, and generates the target blowing temperature signal as a target blowing temperature signal. 5 displaces the temperature control member 1 according to the target air temperature signal, so even if the passenger rides in the winter or summer XJI and the temperature of the passenger's clothing when seated is low or high, Consistent with this, the blowout temperature of the airflow is adjusted based on the displacement of the temperature control member 1. Therefore, no matter what the temperature of the occupant's clothing is, the temperature inside the vehicle immediately after boarding the vehicle remains constant. can always be maintained at a comfortable value.

〔Example〕

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings.
The figure shows -PilI of a control device 20 according to the present invention applied to a vehicle air conditioner 10. The air conditioner 10 introduces outside air or inside air as an airflow into an air duct 11 via a switching damper 12 and a blower 13, and this airflow is passed through an evaporator 14. The vehicle interior R through the air mix damper 15 and heater 16
It is configured to blow out inside. However, the air mix damper 15 is disposed within the air duct 11 between the evaporator 14 and the heater 16, and the opening degree of the air mix damper 15 is upward as shown in FIG. shall increase with respect to the tilting end of . Further, the opening degree of the air mix damper 15 is approximately proportional to the temperature at which the airflow is blown into the vehicle interior R. In addition, in FIG. 2, the symbol R1 indicates a cowl panel, and the symbol R2 indicates an auxiliary seat.

The control device 20 includes a temperature setting device 21 and various sensors 22 to
25, an A-D converter 26 connected to the temperature setting device 21 and various sensors 22 to 25, a microcomputer 27 connected to this A-D converter 26, and a drive mechanism 28 connected to this microcomputer 27. It is made up of. The temperature setting device 21 sets a desired temperature Ts in the vehicle interior R.
When et is set, this desired temperature Tset is generated as a temperature setting signal. The indoor temperature sensor 22 detects the actual temperature Tr in the vehicle interior R and generates an indoor temperature detection signal. The outdoor temperature sensor 23 detects the actual temperature Tam outside the vehicle interior R.
is detected and generated as an outdoor temperature detection signal.

The solar radiation sensor 24 detects solar radiation fl that enters through the window of the vehicle interior R.
Ts is detected and generated as a solar radiation detection signal. The pyroelectric temperature sensor 25 is attached to the cowl panel R1 facing the backrest of the auxiliary seat R2.
5 detects the actual temperature Tcl of the chest portion of the clothing of the occupant seated in the auxiliary seat R2 and generates a clothing temperature detection signal.

The A-D converter 26 receives a temperature setting signal from the temperature setting device 21, an indoor temperature detection signal from the indoor temperature sensor 22, and an outdoor temperature detection signal from the outdoor temperature sensor 23.

Solar radiation detection signal from solar radiation sensor 24 and temperature sensor 2
The clothing temperature detection signal from 5 is digitally converted into a digital temperature setting signal, a digital indoor temperature signal, a digital outdoor temperature signal, a digital solar radiation signal, and a digital clothing temperature signal. The microcomputer 27 is the RO
A computer program previously stored in M is executed according to the flowchart shown in FIG. 3, and during execution, arithmetic processing necessary for controlling the drive mechanism 28 connected to the air mix damper 15 is performed. The drive mechanism 28 is driven under the control of the microcomputer 27 to move the rod 28a up and down to control the opening degree of the air mix damper 15.

In this embodiment configured as described above, while the air conditioner 10 is operating and the microcomputer 27 of the control device 2o is executing a computer program according to the flowchart in FIG. Assume that you get in the car and sit in the auxiliary seat R2.

1. If such a ride is carried out in winter, when the computer program reaches step 31, the microcomputer 27, in cooperation with the temperature setting device 21 and each sensor 22-25, sets the digital temperature setting generated by the A-ray converter 26. signal.

Digital indoor temperature signal, digital outdoor temperature signal.

Each value of the digital solar radiation signal and the digital clothing temperature signal,
That is, each digital value Tset, Tr, Tam, Ts,
Store Tcj. Next, microcomputer 27
However, in step 32, the target blowout temperature Tao of the airflow from the air duct 11 into the passenger compartment R is calculated from the following equation (1) according to each digital value Tset, Tr, Tam, Ts, Tcj.
Calculate.

Tao=Kset4set-Kr4r11-KamI
ITam - to s4s - to Cノ4cノ - to o
...(1) In such a case, in equation (1), each code is set, Kr.

am, s, and Kc are each digital value Tse.
t, Tr.

Each positive correction coefficient for Tam, Ts, and Tcj is shown, and the symbol Ko shows a constant. Note that equation (1) is stored in advance in the ROM of the microcomputer 27.

However, in the above calculation, since the actual temperature of the occupant's clothes is quite low when riding in the winter, the target air temperature Tao is calculated as C in equation (1).
It is largely decided for the sake of ノ・Tcj.

Therefore, in step 33, the microcomputer 27 uses predetermined data (previously stored in the ROM of the microcomputer 27) representing the proportional relationship between the target opening degree of the air mix damper 15 and the target blowout temperature Tao to perform the process in step 32. The target opening degree of the air mix damper 15 is increased and calculated according to the target blowout temperature Tao, this calculated opening degree is generated as an output signal in step 34, and the target blowout temperature Tao in step 32 is taken into consideration in step 35. The internal/external air switching mode, air volume calculation, and outlet switching mode are determined.

As described above, when an output signal is generated from the microcomputer 27, the drive mechanism 28 moves the rod 28a downward to increase the opening degree of the air mix damper 15 toward the value of the output signal. Therefore, the blowing temperature of the airflow into the vehicle interior R is the target blowing temperature Ta.

As a result, even if the temperature of the occupant's clothes is low, the temperature inside the vehicle interior R can be quickly controlled to a high level so as to give a comfortable feeling of heating to the occupant immediately after getting into the vehicle.

2. When the ride as described above is carried out in the summer When the calculation in step 32 is performed in the same way as described above, in this calculation, the actual temperature of the occupant's clothes is high due to the ride in the summer. , target blowout temperature Tao
In equation (1), C!・Determined to be small due to Tcρ. Therefore, in step 33, the microcomputer 27 calculates a decrease in the target opening degree of the air mix damper 15 according to the target blowout temperature Tao in step 32 from the predetermined data, and generates an output signal in step 34. Then, the drive mechanism 28 moves the rod 28a upward to decrease the opening degree of the air mix damper 15 toward the value of the output signal. For this reason, the blowout temperature of the airflow into the passenger compartment R decreases toward the target blowout temperature Tao, and as a result, even if the temperature of the occupant's clothes is high,
The temperature inside the vehicle can be quickly controlled to a low level so as to provide a comfortable feeling of air conditioning to the occupants immediately after getting into the vehicle.

Next, a first modification of the above embodiment will be explained. In this first modification, in the flowchart of FIG. 3, steps 36 and 37 are replaced with steps 31 and 32 as shown in FIG. .32a, and a modified computer program according to the modification flowchart is stored in advance in the ROM of the microcomputer 27 instead of the computer program.

In the first modified example configured in this way, when the modified computer program proceeds to step 31a (see FIG. 4), the microcomputer 27 controls the A-D converter 26.
The values Tset, Tr, and Tan of the digital temperature setting signal, digital indoor temperature signal, digital outdoor temperature signal, and digital solar radiation signal from.

Memorize Ts. Next, in step 36, the microcomputer 27 samples the value TcA of the digital clothing temperature signal from the A-D converter 26 at a period θ,
In step 37, the difference between a pair of consecutive sampling digital values Tc1lO is divided by the period θ, and the quotient is calculated as the temporal change rate of the digital value Tc (ΔTcJ /Δτ).
Set as .

Thereafter, the modified computer program performs step 32a.
Then, the microcomputer 27 calculates the target blowout temperature Tao of the airflow into the passenger compartment R according to the digital values Tset, Tr, Tan, Ts and the temporal change rate (ΔTcl/Δτ) from the following equation (2). Calculate.

Tao= Kset4set −Kr4r −Ka
The data is stored in advance in the ROM of the m-tamter 27. In such a case, in equation (2), Tel in equation (1)
Instead of, (ΔTc, 12 /Δτ) was adopted as
The actual temperature T in the vehicle interior R and the actual temperature T of the occupant's clothing.
This is because the difference from ci has a correlation with the temporal change in the actual temperature Tcj of the clothing immediately after riding. for example,(
Tr−Tcj ) is larger, the actual temperature of the clothing Tcλ
changes over time are large. Note that in equation (2), the sign cJa represents a positive correction coefficient for (ΔTc1/Δτ).

Therefore, in the above-mentioned calculation, since the actual temperature of the clothes of the occupant is considerably lower than the actual temperature in the vehicle interior R when riding in the winter, (ΔTcj /Δτ) in step 37 is similarly large. Therefore, the target blowout temperature Tao is (ΔTcl /Δτ) in equation (2).
largely determined by.

As a result, the blowout temperature of the airflow into the vehicle interior R increases toward the target blowout temperature Tao, as in the case of the embodiment described above. Thereafter, the decrease in (Tr-Tel), that is, (△Tci
/Δ) as the target blowout temperature Ta decreases.

is determined to be smaller in sequence, and the blowout temperature of the airflow is made to match the target blowout temperature Tao. As a result, the pyroelectric temperature sensor 2
Even if an inexpensive sensor with low accuracy is adopted as 5,
If the sampling period θ is appropriately selected, it is possible to ensure a comfortable feeling of heating for the occupant immediately after riding in the winter season, similar to the above embodiment.

In addition, in the above-mentioned calculation, since the actual temperature of the occupant's clothes is considerably higher than the actual temperature in the cabin R when riding in the summer, (Δ
Tcβ/Δτ) also takes a large negative value. Therefore,
The target blowout temperature Tao is expressed as (ΔTcf/Δ
τ) is determined to be small. As a result, the blowout temperature of the airflow into the vehicle interior R decreases toward the target blowout temperature Tao, as in the case of the embodiment described above. Thereafter, as (Tc no Tr) decreases, that is, -(ΔTcλ/Δτ) decreases, the target blowout temperature Tao is determined to be larger in sequence, and the blowout temperature of the air flow is made to match the target blowout temperature Tao. the result,
Even if an inexpensive sensor with low accuracy is adopted as the pyroelectric temperature sensor 25, if the sampling period θ is appropriately selected, a comfortable feeling of air conditioning for the occupants immediately after boarding the vehicle in the summer can be ensured in the same manner as in the above embodiment. obtain.

FIG. 5 shows a second modification of the embodiment, in which a seat temperature sensor 29 is used in place of the pyroelectric temperature sensor 25 described in the embodiment, And in the flowchart of Figure 3, both steps 3
1.In place of 32, both steps 31b as shown in FIG.
, 32b, and a modified computer program according to the modified flowchart is stored in advance in the ROM of the microcomputer 27 instead of the computer program.

The seat temperature sensor 29 is disposed near the upper surface of the seating portion of the auxiliary seat R2, detects the actual temperature Tseat of the buttocks of the occupant's clothing when the occupant is seated on the auxiliary seat gR2, and generates a clothing temperature detection signal.

Note that the A-D converter 26 digitally converts the clothing temperature detection signal from the seat temperature sensor 29 into a digital clothing temperature signal instead of the clothing temperature detection signal from the temperature sensor 25.

In the second modified example configured as described above, when the modified computer program proceeds to step 31b (see FIG. 6), the microcomputer 27 controls the A-D converter 2.
Each value Tset, Tr, Tam, T of the digital temperature setting signal, digital indoor temperature signal, digital outdoor temperature signal, digital solar radiation signal, and digital clothing temperature signal from 6
s, Tseat is stored.

Then, the microcomputer 27 performs step 32b.
Then, each digital value Tset is obtained from the following equation (3).

Target blowout temperature Ta of the air flow according to Tr, Tam, Ts, and Tseat.

Calculate.

Tao=Kset4set -Kr4r -Kam4a
m- to 5-Ts- to 5eat4seat- to o...
・(3) In such a case, in equation (3), the code Ksea
t represents a positive correction coefficient for the digital value Tseat.

Note that equation (3) is previously stored in the ROM of the microcomputer 27 in place of equation (1).

Therefore, in the calculations described above, when riding in winter, the actual temperature of the buttocks of the occupant's clothes is considerably lower than the actual temperature in the passenger compartment R (i.e., the actual temperature of the auxiliary seat R2). Therefore, the target blowout temperature Tao is expressed by the formula (3
) is largely determined for the digital value Tseat. As a result, the blowout temperature of the airflow into the vehicle interior R increases toward the target blowout temperature Tao, as in the case of the embodiment described above.

As a result, it is possible to ensure a comfortable feeling of heating for the occupant immediately after riding in the winter season, similar to the embodiment described above.

In addition, in the above-mentioned calculation, when riding in the summer, the actual temperature of the buttocks of the passenger's clothing is considerably higher than the actual temperature in the passenger compartment R (i.e., the actual temperature of the auxiliary seat R2). , the eye edge blowout temperature Tao is determined to be small because of the digital value Tsea (in equation (3). As a result, similarly to the embodiment described above, the blowout temperature of the air flow into the passenger compartment R is set to the target blowout temperature Tao. As a result, it is possible to ensure a comfortable feeling of air conditioning for the occupants immediately after riding in the summer season, similar to the above embodiment.

In addition, in implementing the present invention, (
-Kseat4seat) is added, and the seat temperature sensor 29 (see FIG. 5) is added in FIG. may be determined.

Further, in carrying out the present invention, in the second modification example, if a heater is built into the seating part of the auxiliary seat R2 to heat the seating part, or if the seating part of the auxiliary seat R2 is heated from the air outlet of the air duct 11, Even when a conduit is extended into the seating area to heat (or air-condition) the seating area, the comfortable heating or cooling sensation immediately after the passenger gets into the vehicle can be adjusted according to the detection result of the seat temperature sensor 29. The target blowing temperature Tao can be determined to be ensured in substantially the same manner as in the embodiment.

In addition, in the embodiment and each modification example, the auxiliary gR2
Although an example has been described in which the present invention is applied to the air conditioner 10 in relation to the temperature of the clothes of a passenger sitting in the driver's seat or the rear seat of the vehicle, the present invention is not limited to this. In this regard, the present invention may be applied to the air conditioner 10, and in such a case, the temperature sensor 25 or the seat temperature sensor 29 may be provided at an appropriate position corresponding to each seat.

Further, in the embodiment, a single temperature sensor 25 is used, but the present invention is not limited to this, and a plurality of temperature sensors 25 may be used. In such a case, a sensor for correcting the emissivity of clothing may be built into the temperature sensor 25.

[Brief explanation of drawings]

FIG. 1 is a diagram corresponding to the structure of the invention described in the claims, FIG. 2 is a block diagram showing an embodiment of the device of the present invention applied to a vehicle air conditioner, and FIG. FIG. 4 is a flowchart showing a modification of the flowchart in FIG. 3, FIG. 5 is a block diagram showing a modification of the embodiment described above, and FIG. 6 is a flowchart showing a modification of the flowchart in FIG. It is a main part flowchart showing the operation of the microcomputer. Description of symbols 10...Air conditioner, 11...Air duct, 15...Air mix damper, 20...Control device, 21...Temperature setting device, 22...Indoor temperature sensor, 2
3... Outdoor temperature sensor, 25... Pyroelectric temperature sensor, 26... A-D converter, 27... Microcomputer, 28... Drive mechanism, 29... Seat temperature sensor.

Claims (1)

[Claims] The air conditioner is applied to an air conditioner equipped with a temperature control member disposed in an air duct of a vehicle and adjusts the temperature of the air flow blown from the air duct into the vehicle interior according to displacement, to adjust the temperature within the vehicle interior to a desired temperature. temperature setting means that generates the desired temperature as a temperature setting signal when set; indoor temperature detecting means that detects the actual temperature in the vehicle interior and generates the indoor temperature detection signal; and the temperature setting signal and the indoor temperature detection. target value determining means for determining a target value of the outlet temperature in response to a signal and generating it as a target outlet temperature signal; and a driving means for displacing the temperature adjusting member to a position corresponding to the value of the target outlet temperature signal. The control device further comprises clothing temperature detection means for detecting the actual temperature of clothing of the passenger when the passenger is seated on the seat in the vehicle interior, and generating a clothing temperature detection signal, and wherein the target value determining means 1. A control device for a vehicle air conditioner, characterized in that the target value of the outlet temperature is determined according to a temperature setting signal, an indoor temperature detection signal, and a clothing temperature detection signal.