JP3155131B2 - Vehicle air conditioner - Google Patents

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 provided with a thermal sensation switch for instructing and inputting a passenger's bodily sensation state. In addition, the correction amount of the air conditioning control is made variable.

[0002]

2. Description of the Related Art Generally, as a control method of a vehicle air conditioner, various types of environmental sensors are provided, and detection values from these sensors are used to calculate an equivalent temperature using an equivalent temperature calculation formula.
It is known that the temperature at which the occupant feels is estimated based on the equivalent temperature, and the sensible temperature becomes a comfortable temperature. That is, the occupant's bodily sensation state is estimated from information on the natural environment outside the vehicle and the air-conditioning environment inside the vehicle obtained from various sensors, and the air-conditioning control is modified so that a comfortable sensation can be obtained.

Such an air conditioner for a vehicle includes various types of air conditioners including a cooling / heating system for changing the temperature inside the vehicle, a blower blower, etc., a solar radiation sensor for receiving sunlight incident on the vehicle interior and detecting the amount of solar radiation, and an air conditioning system. Various environmental sensor groups including an indoor air temperature sensor and an outdoor air temperature sensor provided in a duct, a cabin temperature sensor for detecting a vehicle interior temperature, and equivalent temperature calculating means for evaluating and calculating detection values from these sensor groups; The system includes a total value calculating means for calculating a total value based on the calculated temperature value and the comfort target value, and a control means for calculating a control value for driving and controlling the air conditioner group based on the total value.

[0004] When the air conditioner is started in the automatic mode, a target temperature, which is a pre-set comfortable sensible temperature, is read into the total value calculating means. Next, from the detected values continuously input from various sensors, the equivalent temperature calculating means calculates the equivalent temperature using the equivalent temperature calculating formula. And
The total value calculation means calculates the total value so that the equivalent temperature matches the target temperature, and the control means drives and controls each air conditioner based on the total value. That is, air conditioning control has been performed so that the sensible temperature estimated by calculating and estimating the detection value from the sensor group always coincides with the comfortable target temperature.

Therefore, when the natural environment such as solar radiation fluctuates, the sensor detects the amount of the change, and the equivalent temperature of the equivalent temperature calculation formula is changed by the changed detected value.
The temperature inside the vehicle may be automatically corrected. That is, the fluctuation of the natural environment is detected, and the comfort of the air-conditioning environment can be automatically maintained.

Also, due to individual differences in gender, clothes, etc., the sensible temperature of each occupant may differ from the equivalent temperature obtained by the equivalent temperature calculation formula assuming the average sensation of a human. May not be maintained. For this reason, the air conditioner is provided with a switch for changing the target temperature by manual operation. That is, the occupant can change the target temperature of the air conditioner in order to make the general sensible temperature obtained from the air conditioning control match the individual sensible temperature for each occupant. For example, when the occupant feels hot during the automatic operation of the air conditioning control, if the occupant switches, the target temperature of the air conditioner is lowered by a certain predetermined value, while the occupant is too cool. If the user feels, the target temperature is increased by a certain predetermined value. Then, air conditioning control is performed based on the target value corrected by the occupant, so that the comfort of the air conditioning environment desired by each occupant is maintained.

[0007]

However, in the above-described air conditioner, the target temperature of the air conditioner is changed for each fixed unit by a switch operation of an occupant.
There is a case where the occupant does not agree with a characteristic comfortable sensible temperature and may be slightly different from each other, which causes a problem that sufficient comfort cannot be obtained. Further, the amount of change in the temperature can be input as a numerical value. However, in this case, the temperature is corrected by the occupant's sensation, and it is difficult to accurately convert this sensation into a temperature correction. Comfort may be impaired.

If the cause of the change in the target temperature is a change in the sensation caused by a change in the environment outside the vehicle, the change is performed without instructing the air conditioner of the specific environmental factor. At the same time, the air conditioner calculates the equivalent temperature on which the environmental change is reflected by the equivalent temperature calculation formula. Therefore, changing the target temperature without correcting the evaluation tendency of the arithmetic expression means that the original purpose of the equivalent temperature for estimating the occupant's bodily sensation has not been achieved. In addition, changing the target temperature, which has been set as a comfortable sensible temperature in advance, may impair the precise overall balance of a control system designed around this target temperature.

Therefore, according to the present invention, when the thermal sensation switch is operated, the correction is performed by the control amount according to the control state of the air conditioner, and the factor of the switch operation is estimated from this control state to correct the equivalent temperature equation. It is an object of the present invention to provide a vehicle air conditioner.

[0010]

According to the present invention, there is provided an air conditioner for a vehicle, comprising: a solar radiation sensor for detecting an amount of solar radiation; a temperature sensor inside and outside the vehicle; a blower blower provided in an air conditioning duct; A vehicle air conditioner having a mix door for changing a mixing ratio with hot air by increasing or decreasing an opening angle, wherein a heat / cool switch operated when an occupant feels hot or cold. An equivalent temperature calculating means for calculating an equivalent temperature according to a predetermined equivalent temperature calculating formula based on detection values of various sensors; and a total value calculating calculating a total control value based on the equivalent temperature and a preset target temperature. Means, control means for driving and controlling the blower and the mix door based on the total value, a blower control signal and a mix door opening signal of the total value calculation means, and a switch input of the thermal sensation switch. Based on the map in which the correction value corresponding to each detection value is set, each correction value according to the state of the air-conditioning control at the time of the switch operation is selected, and each evaluation coefficient in the above-mentioned equivalent temperature calculation expression is selected. And an evaluation coefficient correcting means for correcting

[0011]

According to the present invention, according to the thermal sensation switch to which the occupant makes a bodily sensation when he / she is uncomfortable, the switch input referred to by this switch input is distinguished, and the blower control signal and the control state of the mix door opening signal are controlled. By providing the coefficient correction map, each correction value is determined by referring to the map based on the control information at the time of this switch operation and the bodily sensation input,
The corresponding evaluation coefficient in the equation for calculating the equivalent temperature is simultaneously and compoundly corrected by these correction values. In other words, from the control state that is the result of evaluating the inside and outside environment, the actual inside and outside environment is estimated, and assuming that the air conditioning control correction request is from one or more environmental factors, the evaluation of the arithmetic expression corresponding to this factor is performed. Corrected. Then, the equivalent temperature is corrected by the corrected arithmetic expression, and the air conditioner is driven and controlled by the integrated value calculating means based on the corrected equivalent temperature, so that the temperature inside the vehicle is changed.

Therefore, when the occupant operates the thermal sensation switch due to insufficient comfort of the air conditioning environment, the control information at the time of operating the switch and the correction value for each detection value according to the input of the thermal sensation switch. According to the above, since each evaluation coefficient in the equivalent temperature calculation equation for evaluating and converting each detection value is simultaneously and compounded, how the occupant evaluates the currently operating air conditioning control, and The different sensational tendencies can be incorporated into the equivalent temperature calculation formula. Therefore, only by operating the thermal sensation switch, the evaluation tendency of the arithmetic expression is similar to the occupant's bodily sensation, so that good correction operability can be obtained. Also, by correcting the evaluation tendency of the equivalent temperature calculation formula that estimates the occupant's bodily sensation, the calculated equivalent temperature is changed and the air conditioning control is performed to a new temperature, so the target temperature set at the time of design is changed. It is not necessary to perform the control, and the overall balance of the control can be favorably maintained.

Further, since the correction is made in accordance with the control state at the time of operating the switch and the request of the occupant, when the effect of the correction becomes invalid, the correction is prohibited and the control becomes unbalanced. Can be prevented. Further, it is presumed that the occupant is uncomfortable because the effect of a certain control such as the air volume is excessive, and the evaluation of this effect is increased, and this excessive effect can be immediately reduced. The effect of the operation can be made more effective. That is, it is possible to make a correction that promptly and surely responds to the request of the occupant, and it is possible to efficiently correct the control.

Furthermore, the influence on the bodily sensation due to each environment is determined not only by the influence of one environmental factor but also by a complex influence which is related to each other. The correction of the influence evaluation is performed, and the advanced air conditioning control is performed more integratedly.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to one embodiment shown in FIGS. Vehicle air conditioner 10 of the present embodiment
As shown in FIG. 1, the air conditioner includes various air-conditioning devices provided in a duct 11 and a control unit 12 that drives and controls these devices. At the most upstream side (left side in the figure) of the duct 11, an inside air inlet 13 and an outside air inlet 14 are provided, and an intake door 15 for switching between the air inlets 13, 14 is provided. Also, this duct 1
An air blower 16, an evaporator 17, a mix door 18, and a heater core 19 are arranged in this order from the upstream side to the downstream side in 1. Further, a vent outlet 21, a defroster outlet 22, and a foot outlet 23 communicating with the vehicle compartment 20 are provided at the most downstream side (right side in the figure) of the duct 11. These outlets 21, 22, and 23 are provided with switching doors 24a, 24b, and 24c for mode switching, and open and close.

The blower 16 has an electric motor 16a.
The rotational speed of the motor 16a is increased or decreased by changing the supply voltage to the motor 16a, thereby changing the rotation speed of the motor and adjusting the amount of air blown into the duct 11. Therefore, by detecting the motor voltage, the outlet 21,
It is possible to estimate the air flow velocity blown out from the compartments 22 and 23 to the passenger compartment 20.

The evaporator 17 includes a compressor 2
5, condenser 26, receiver tank 27, expansion valve 28
Are sequentially connected by piping, and constitute a cooling system for circulating and flowing a refrigerant therein. This compressor 25 is driven by a traveling engine 30,
The refrigerant is compressed and sent by the compressor 25.
Then, when the refrigerant is compressed and expanded, heat exchange is performed between the air passing through the evaporator 17 and the low-temperature refrigerant, and the air introduced into the duct 11 is cooled.

The heater core 19 is provided with the driving engine 3.
The radiator 31 is connected to the radiator 31 by a pipe, and a heating system for circulating the engine cooling water therein is configured. That is, cooling water for radiating the engine is supplied to the heater core 19, and the high-temperature cooling water heats the air that has passed through the heater core 19.
The heater core 19 is provided with a mix door 18 that opens and closes the heater core ventilation surface. The mix door 18 has an adjustable opening and closing angle. Therefore, the ratio of the air heated by passing through the heater core 19 to the bypass air is set by the opening degree of the mix door 18, and the ratio of the hot air to the total air volume is adjusted by the mixture ratio. The blast temperature is adjusted. 3
Reference numeral 2 denotes a control valve for adjusting the flow rate of cooling water supplied to the heater core 19.

The opening / closing of the vent outlet 21, the defroster outlet 22, and the foot outlet 23 is selected by each of the switching doors 24a, 24b, 24c for switching the blowing mode communicating with the interior of the vehicle compartment 20, and this selection is made. From the outlet
The conditioned air is delivered into the passenger compartment 20.

The control unit 12 includes an outside air temperature sensor 42 for detecting an outside air temperature Tamb, an inside air temperature sensor 43 for detecting an inside air temperature Tinc (temperature in the vehicle compartment 20), and a solar radiation sensor for detecting an amount of solar radiation Qsn. 44 is connected, and an operation panel 33 for displaying an operation state of the air conditioner 10 and inputting an instruction of a passenger is connected.

The operation panel 33 is installed at a place where the occupant can easily see and operate the occupant, such as near the center of the dashboard of the passenger compartment 20, so that the occupant can operate the air conditioner 10 while checking. The operation panel 33 includes, as shown in FIG. 2, a display unit 34 using liquid crystal or the like and an operation switch group 35. On the display unit 34, the current operation state of the air conditioner 10, such as the operation mode and the temperature set by the operation switch group 35, is displayed as text and graphic information, so that the operation state can be easily grasped. I have. The operation switch group 35 includes various setting switches 36 arranged in a lower row and an operation panel 33.
Mode auto switch 3 located to the right of
7 and an off switch 38 in the off mode.

The setting switch 36 includes a gender switch 36a for inputting the gender of the occupant, a clothing switch 36b for inputting the degree of the amount of clothing, and an air volume from the air outlet. Blower switch 36c for adjustment, outlet mode switch 36d for selecting the outlet mode, A / C switch 36e for switching the operation mode of the compressor, inside / outside air switch 36f for selecting the inside / outside air circulation, and outlet fixed to the defroster And a differential switch 36g.

In between the auto mode switch 37 and the display panel 33, cold / hot switches 39a and 39b, which are thermal sensation switches 39, are individually provided. The thermal sensation switch 39 is a push-on type switch, and can be turned on a plurality of times. By operating the thermal sensation switch 39, the processing of a correction routine for correcting an evaluation coefficient in the equivalent temperature calculation expression of the present invention described later is started.

As shown in FIG. 1 again, the control unit 12 includes a microcomputer having an I / O port, a CPU, a memory, etc., an A / D converter for converting each input signal into a digital signal, and the like. And a driving circuit for controlling the driving of the air conditioner. When the air conditioner is operated automatically, each sensor 42, 4
The equivalent temperature Teq is calculated from the input data Tamb, Tinc, and Qsn from the input devices 3, 44, and the equivalent temperature Teq and the target temperature Tre are calculated.
The total operation value X is calculated from f and f. Then, various control signals based on the total calculation value X are used to control the intake door 15, the blower blower 16, the compressor 25, the mix door 18, the mode doors 24a, 24b,
Each control of 24c is performed. In FIG. 1, 51, 52,
Numeral 53 denotes an actuator for opening and closing the respective doors, and numeral 54 denotes a variable resistor for increasing or decreasing the supply voltage of the blower motor 16a, the operation of which is controlled by the control unit 12. The microcomputer of the control unit 12 constitutes equivalent temperature calculating means, equivalent temperature calculating coefficient correcting means, total value calculating means, and control means for the air conditioner.

Next, the overall air conditioning control will be described with reference to the flowchart shown in FIG. First, when the air conditioner 10 is started, air conditioning control is started in accordance with this main routine, and in step P100, a self-diagnosis test of the microcomputer and initial settings of various control values are performed to prepare for operation. Then, in Step P200,
The detection / setting signals from the sensors 42, 43, 44 and the operation panel 33 are read. Next, in step P300, the operation judgment of the thermal sensation switch 39 of the operation panel 33 is performed, and when this operation is performed, the evaluation coefficient in the equivalent arithmetic expression is corrected according to the operating state of the air conditioner. . Further, in Step P400, the equivalent temperature Teq is calculated using the corrected or uncorrected equivalent calculation expression. Then, in step P500, a total operation value X for controlling the entire air conditioner 10 is calculated so that the equivalent temperature Teq matches the target equivalent temperature Tref. The target equivalent temperature Tref is 23 ° C., which is a comfortable sensation temperature of the occupant.
Initialized to and fixed. Finally, step P60
0, the control unit 12 controls the intake door 15, the blower 16, the compressor 25, the mix door 18, and the mode door 24 based on the total operation value X.
The driving of a, 24b, 24c, etc. is controlled.

First, the equation for calculating the equivalent temperature of the equivalent temperature calculation routine will be described, and then the correction routine for correcting the coefficients of this calculation equation by referring to a map will be described. That is, in the equivalent temperature calculation routine P400, the equivalent temperature Teq is
It is calculated by the following equivalent temperature calculation formula.

Teq = A · Tinc + B · Trad + (CD−Ｄ)
Va) · (E−Tinc) / (1 + Icl) As described above, the arithmetic expression is made up of three terms, and each of these terms is based on the influence of temperature on the occupant's bodily sensation, the influence of radiant heat such as solar radiation, and the influence of air velocity. Are evaluated and converted to equivalent temperatures. A, B, and D in each term indicate evaluation coefficients,
Initial values are set, and these evaluation coefficients A, B, and D may be updated and corrected by a correction routine described later. Further, C and E are constants, and C is fixed at 0.24 and E is fixed at a fixed value such as 36.5.

The first term in this equation evaluates the effect of the temperature actually controlled by the inside air temperature Tinc from the inside air temperature sensor 42 by converting it into a sensed temperature. The evaluation coefficient A used here is set to 0.55 as an initial value.

Next, the second term mainly evaluates the influence of radiant heat such as solar radiation and converts it to the perceived temperature. This Trade
Indicates an average radiation temperature (° C.) and is calculated from the following equation.

Trad = K1 · Tb + K2 · Qsn Here, Tb indicates the temperature (° C.) of the inner wall of the vehicle body, and Qsn
Is the amount of solar radiation from the solar radiation sensor 43 (Kcal / m ² h)
And K1 and K2 are fixed constants.

The vehicle body inner wall temperature Tb is calculated from the following equation.

M · dTb / dT = Ka · [dQsn−Kb · (Tb
−Tamb) −K3 · (Tb−Tinc)] In this way, Trad is calculated, and this Trad is multiplied by the evaluation coefficient B. As the evaluation coefficient B, 0.45 is set as an initial value. M, Ka, Kb, and K3 are constants.

Further, the third term mainly evaluates the influence of the air flow velocity in the passenger compartment 20 and converts it into a sensed temperature. here,
Va indicates the air flow velocity, and Icl indicates the amount of clothing. Air velocity Va
Is calculated from the motor supply voltage Vfan of the blower 16 by the following equation.

Va = K4 · Vfan where K4 is a fixed conversion constant. As described above, in the present embodiment, the air flow velocity Va is calculated and estimated from the motor voltage Vfan. However, it is also possible to newly provide an air flow velocity sensor and directly obtain the air flow velocity Va using this sensor. Good.

Next, the clothing amount Icl is determined by the outside air temperature sensor 42.
From the outside air temperature Tamb with reference to the characteristic diagram shown in FIG. The estimated clothing amount Icl may be corrected by the occupant by the clothing switch 36b of the operation panel 33.

As described above, the third term of the equivalent temperature calculation equation is calculated from the above equation and the characteristic diagram, and the evaluation coefficient D is multiplied as one coefficient in the third term. This evaluation coefficient D
Is set to 0.75 as an initial value.

Then, the equivalent temperature T calculated as described above is obtained.
Control is performed so that eq matches the target temperature Tref. The target temperature Tref is fixedly set to 23 ° C., which is the average value of the comfortable sensation temperature of the occupant, as a default value. When the comfort of the air-conditioning environment is insufficient, the occupant operates the thermal sensation switch 39, and the operation shifts to the correction routine by operating the switch 39.
In some cases, the evaluation coefficients A, B, and D of the above-described equivalent temperature calculation expression are updated and corrected.

That is, in the correction routine, as shown in the flowchart of FIG. 5, first, in step P301, it is determined whether or not the occupant has operated the thermal sensation switch 39. And when the switch is operated,
The process proceeds to Step P302, and a correction process of each evaluation coefficient used in the equivalent temperature calculation expression is performed. On the other hand,
If the switch is not operated, the correction routine is terminated, and the process returns to the main routine without correcting the coefficient.

In this step P302, a correction value is obtained with reference to the map shown in FIG. 6, and the evaluation coefficient of the equivalent temperature calculation formula is updated and corrected by the correction value. The map in FIG. 6 includes an upper control state graph and a lower correction value table. Then, the control state at the time of operating the switch is selected according to the upper graph, and then,
Based on the selected control state and the distinction of the switch operated by the occupant, the correction values a, b, and d of the evaluation coefficient and the setting display correction value Ts are selected from the correction value table at the bottom. These correction values a, b, and d are added to the evaluation coefficients A, B, and D of the equivalent temperature calculation expression, respectively, and updated and corrected. The correction values a, b, and d of these evaluation coefficients correspond to the evaluation coefficient A for the influence of temperature on the occupant's bodily sensation, the evaluation coefficient B for the effect of radiant heat such as solar radiation, and the evaluation coefficient D for the effect of airflow velocity. Are set in association with other correction values depending on the control state at that time. The set display correction value Ts corrects the set temperature displayed on the display unit 34 of the display panel 33, and the correction value Ts varies variously depending on the control state as described later.

That is, this control state graph is divided into eight sections in the horizontal direction. The left end indicates the strongest cooling state, and the right end indicates the strongest heating state. This state graph is composed of a graph of the upper motor voltage Vfan and a graph of the opening% of the lower mix door 18.
The current control state is selected by combining the two graphs. The blower motor voltage Vfan indicates a voltage supplied to the electric motor 16a for driving the blower blower 16, and this voltage takes a value in a range of 5 to 12V. Therefore, the level of this voltage increases or decreases the number of rotations of the motor 16a, and is proportional to the amount of air blow.
The mix door opening% indicates the opening of the mix door 18 that opens and closes the ventilation surface of the heater core 19 in units of%, and takes a value from 0% fully closed to 100% fully opened. Therefore, the magnitude of the% value changes the mixing ratio of the cool air and the hot air in the duct by increasing or decreasing the opening angle, and is proportional to the level of the air blowing temperature. In addition, both these devices 16
a and 18 are controlled in conjunction with each other, and the control values such as the opening degree and voltage are always on the lines of the two graphs.

Therefore, by combining these two graphs, one of the eight divided control states can be selected, and the control state of the air conditioner at the time of operating the thermal sensation switch can be selected. . This is, for example,
Motor voltage Vfan is 12V and mix door opening is 10
In the case of 0%, since it is the maximum temperature of the maximum air volume, it is determined that the heating state is the strongest, and the rightmost row is selected. Further, the cooling state in which the mixed door opening degree is 0% is divided into three stages by the blower motor voltage Vfan. However, the cooling state can be further divided into multiple stages to perform more detailed control.

Next, from the row of the control state selected in this way and the distinction of the thermal sensation switch 39 operated by the occupant,
The correction values a, b, d and the setting display correction value Ts are selected according to the correction value table in the lower part.

That is, this correction value table is divided into two tables: a table when the switch is operated when it is cold and a table when the switch is operated when it is hot. In this cold-state switch correction value table, the reference correction value groups are a and b.
Is -0.1, d is +0.1, and Ts is 1. Then, in the correction value table of the switch at the time of hot weather, the correction value group as a reference is such that a is 0, b is +0.1, and d is -0.1.
1, Ts is -1. Furthermore, as for the tendency of these two tables, the former is mainly affected by the airflow velocity and the latter is mainly affected by the heat radiation and the airflow velocity.

In these correction value tables, when the air-conditioning capacity of the air conditioner is being maximized, a correction in response to a request to increase this capacity is regarded as an ineffective and harmful correction.
Any amendments are prohibited. There is one column for each switch correction value table, and all correction values and correction values are zero.

First, a case where the control state is in the rightmost column in the correction table by the switch operation when the temperature is cold in the above table. In other words, this state is the maximum airflow of the maximum motor voltage and the maximum mix door opening. In this strongest heating state, a request is made to operate the switch when the temperature is cold to obtain more heating capacity.

Second, a case where the control state is in the leftmost column in the correction table by the switch operation when the switch is hot in the following table is shown. In other words, this state is a maximum airflow of the maximum motor voltage and a minimum mix door opening. In this strongest cooling state, a request is made to operate the switch when the temperature is hot to obtain more cooling ability.

As described above, since it is impossible to fulfill the request,
When the effect of the coefficient correction is invalid, the correction of the control is prohibited to prevent the control balance from being adversely affected. Therefore, in these cases, the correction by the operation of the thermal sensation switch is prohibited, that is, a process of not performing the correction is performed, so that a good control balance can be maintained.

On the other hand, a request for reducing the capacity when the maximum capacity is exhibited can be easily realized, and the effect of the correction is sufficiently effective. Therefore,
By increasing the correction amount of the evaluation coefficient, the air conditioning control can quickly and accurately respond to the request by the switch operation.

The first case is when the control state of the switch correction table in cold weather is in the leftmost column, which is the maximum airflow at the maximum motor voltage and the minimum mix door opening. In such a strongest cooling state, a request to weaken the cooling by operating the switch when it is cold,
Can be easily handled. In other words, when the switch is operated during the maximum cooling, when the switch is cold, the corrected b value becomes 0,
The d value is +0.3. In this case, since the cooling state is the strongest, it is considered that the influence of the heat radiation can be ignored. Further, since the influence of the cold air is increased by the maximum air flow, the occupant feels that the air flow is too cold and operates the switch when the occupant is cold. Therefore, it is possible to prevent the occupant from getting too cold due to the influence of the excessive air flow velocity.
The setting display correction value is also doubled to +2 since the switch operation is largely reflected in the control. Also, in a column adjacent to this column, the b value is 0, the d value is +0.2, and the Ts value is 1.5 for the same reason.

The second is a case where the control state of the hot weather switch correction table is in the rightmost column, and this state is the maximum airflow at the maximum motor voltage and the maximum mixed door opening. In such a strongest heating state, it is possible to sufficiently respond to a request to weaken the heating. That is, when the switch is operated at the time of hot during the maximum heating, the correction values are all doubled, and the a and b values are +0.2 and the d value are -0.2.
It has become. Thereby, all the influences are evaluated more greatly. Therefore, the equivalent temperature according to the equivalent temperature equation is greatly increased, and the control temperature is rapidly decreased. The setting display correction value is also doubled to be -2. The sixth and seventh states from the left in this column also have similar tendency correction values for almost the same reason.

Next, the intermediate state other than the above-mentioned limit state at both ends will be described sequentially from left to right for each correction value table.

First, in the cold weather switch correction table, when the control state is the third to fifth from the left end, the mix door opening is relatively small and the temperature is low, and the blower motor voltage is low. It is the air volume, and normal correction is performed.

In the sixth case from the left end, high-temperature air is blown with a relatively large mix door opening, and the air flow is low with a low blow motor voltage. That is,
While the blast temperature is already in the high temperature range, the effect of this air velocity is likely to be insufficient due to the relatively low air velocity,
Assuming that the switch was operated when it was cold, the air volume correction was increased.

Next, in the control state of the switch correction table at the time of hot weather, in the second and third states from the left end, the mix door is fully closed and cool air is blown, while the blower motor voltage is low and the air flow is low. When the switch is operated when the temperature is low and the temperature is cold and the temperature is hot, the b value, which should be 0, is increased to +0.1.
In consideration of radiation effects such as heat retention by a seat or the like in which an occupant is seated. In the fourth and fifth states from the left end, the mix door opening degree is a relatively small amount of warm air while the blower motor voltage is the minimum minimum air volume. Therefore, in this case, since the air volume is small, the b value is set to +0.2 in consideration of radiation effects such as solar radiation.

As described above, when the thermal sensation switch 39 is pushed once, each evaluation coefficient of the equivalent temperature calculation equation is corrected according to the distinction between the switches and the control state at that time. Therefore, the calculation result of the equivalent temperature calculation formula becomes a value different from that before correction, and the total value calculation means controls so as to reduce this difference, so that the temperature inside the vehicle becomes higher or lower than before the operation. ing.
For example, when the occupant feels the heat and wants to lower the temperature inside the vehicle, when the switch 39b is pushed when the temperature of the thermal sensation switch 39 is hot, the evaluation coefficient is increased by referring to the map, and the equivalent calculation is performed by the corrected arithmetic expression. The temperature is calculated higher than before the correction. Then, in order to match the increased equivalent temperature with a constant target temperature, the total value calculating means lowers the control temperature, and the vehicle interior temperature becomes lower than before the switch operation.

If a certain thermal sensation switch operation is performed and a new switch operation is performed, the arithmetic expression is corrected by a correction value corresponding to the control state at that time, and the correction of these coefficients is accumulated. It is supposed to. For example,
Motor voltage Vfan is 5V and mix door opening is 50%
In the case of, when the switch 39a is operated when it is cold, and then when the switch 39b is operated when it is hot when the motor voltage Vfan is 10 V and the mix door opening is 100%, the A value is set to the initial value. From 0.55 to 0.54, then to 0.56.

The evaluation coefficients A, B, and D of the equivalent temperature equation updated and corrected in this way and the set display temperature are stored until the engine 29 of the vehicle is stopped. .

As described above, according to this embodiment, the thermal sensation switch to which the occupant makes a bodily sensation when he / she is uncomfortable, the switch input referred to by this switch input, the blower control signal and the mixed door opening signal By providing a coefficient correction map corresponding to the control state of each switch, each correction value is selected by referring to the map based on the control information at the time of this switch operation and the bodily sensation input. Of the corresponding evaluation coefficients are simultaneously and compoundly corrected. That is, the actual internal / external environment is estimated from the control state as a result of evaluating the internal / external environment, and it is determined that the correction request of the air conditioning control is due to one or more environmental factors, and the evaluation of the arithmetic expression corresponding to this factor is performed. Has been corrected. And
The equivalent temperature is corrected by the corrected arithmetic expression, and the driving of the air conditioner is controlled by the total value calculating means based on the corrected equivalent temperature, so that the temperature inside the vehicle is changed.

Therefore, the environment inside and outside is estimated from the control result at the time when the switch is operated, and it is considered that the occupant is uncomfortable due to the influence of one or more of these environmental factors. The impact assessment has been individually increased or decreased to modify the assessment system. That is, the evaluation system is modified so as to be more adapted to the individual sensational tendency of each occupant. Then, since the air conditioning control is performed by evaluating the inside and outside environment by this modified evaluation system, it is possible to always maintain good air conditioning control without impairing the control balance in principle. Therefore, only by operating the thermal sensation switch, the evaluation tendency of the arithmetic expression is similar to the occupant's bodily sensation, so that good correction operability can be obtained. In addition, by correcting the evaluation tendency of the equivalent temperature calculation formula for estimating the occupant's bodily sensation, the calculated equivalent temperature is changed and the air conditioning is controlled to a new temperature. No change is required, and the overall balance of the control can be favorably maintained.

Further, since the correction corresponding to the control state at the time of the switch operation and the request of the occupant is performed, if the effect of the correction becomes invalid, this correction is prohibited and the control becomes unbalanced. Can be prevented. Also, it is presumed that the occupant is uncomfortable due to the effect of a certain control such as air volume being excessive, and the evaluation of this effect is increased, and this excessive effect can be immediately reduced. The effect of the correction can be made more effective. That is, it is possible to make a correction that quickly and surely responds to the passenger's request, to improve the actual efficiency of the control correction, and to improve the performance of the air conditioner.

Further, the influence of the individual environment on the bodily sensation has been determined, but is not limited to the influence of a single environmental factor, but is considered to be a composite influence.
Modification of the interrelated complex impact assessment is performed, and advanced air conditioning control is performed more integratedly, so that performance can be further improved.

Furthermore, the effect can be obtained using the present embodiment in an air conditioner controlled by an equivalent temperature equation without adding a new device such as a sensor, and the invention can be widely and easily applied. be able to. That is, by reading the two control values calculated by the total value calculating means and adding a correction map, the built-in program in the microcomputer which is means for realizing each calculating means is changed.
This embodiment can be realized.

Next, the present invention will be described based on another embodiment shown in FIG. In the present embodiment, the configuration of the air conditioner 10 is the same as that of the above embodiment, and the map content of the correction routine is changed in order to apply to an air conditioner in which the control of the blower and the control of the mix door are independent. Is what it is. In this case, the evaluation coefficients A, B, and D in the above-described equivalent temperature calculation formula are updated and corrected with reference to a map based on two detection values and a distinction between thermal sensation switches.

That is, referring to the map shown in FIG.
Each correction value a, b, d is determined. This is because the upper or lower correction table is selected based on the distinction between the switch 39a at the time of cold and the switch 39b at the time of hot, and in this selected table, the blower motor supply voltage Va indicating the air volume and the mixed door indicating the cooling / heating state. Each correction value is selected from the opening degree. Then, these values a, b, and d are added to the evaluation coefficients A, B, and D of each term of the equivalent temperature equation, and each evaluation coefficient is updated and corrected. The corrected new evaluation coefficients are updated and corrected again by the correction routine, and the corrections are accumulated.

In each table of FIG. 7, the horizontal direction is divided by the mix door opening, and the vertical direction is divided by the motor voltage. The correction values a, b, and d and the setting display correction value Ts are stored in one column divided by the two control values. Further, the division of the mixed door opening degree (%) is such that 5 units are provided at both ends on the left and right sides, and 30 units are provided between them. Further, the motor voltage (V
In the category a), the upper end is 0.5 units, and the lower two columns are 2.5 units. This means that when the control state is within these end regions, the capability of the air conditioning control is near the limit, and the modification of the control is correspondingly specialized. That is, the mix door opening indicates the ratio of the introduced air passing through the heater core, and the temperature of the air is set by increasing or decreasing the opening. For example, when the opening degree is around 100%, all the introduced air passes through the heater core.
This means that the maximum heating capacity is exhibited. On the other hand, when the opening degree is around 0%, the heating capacity is not used because all the introduced air bypasses the heater core. Also, the increase or decrease of the blower motor supply voltage changes the air flow velocity to a high or low level, thereby increasing or decreasing the influence of the hot air / cold air by the air flow velocity.

In the correction value table for the switch when the temperature is cold, as the reference correction value groups, a and b are -0.1, d is +0.1, and Ts is 1. As a general tendency of the correction values in the correction table, the evaluation correction of the air flow velocity is mainly performed as the control state moves rightward and downward from the normal correction at the upper left. However, as you go down,
Evaluation correction of thermal radiation is reduced, and near the lower left side, the total correction value tends to decrease.

In the correction value table of the switch when the temperature is hot, a is 0 and b is +0.
1, d is -0.1 and Ts is -1. The overall trend of this table is that the heat radiation in the upper left is the main correction from the evaluation correction, and the middle correction through the reference correction group, the uncorrection in the lower left, the correction in the temperature main in the left, and the total correction in the lower right It is a doubled fix.

First, in the cold weather switch correction value table,
The control state will be described in order from the upper left to the adjacent part.

First, when the control state is near the upper left of the correction table, the correction is performed using the reference value. That is, it is a region where the motor voltage is 5.0 to 7.5 V and the mixed door opening is 0 to 65%, which is a medium to low mixed door opening with a low motor voltage. In such a low air-conditioning air-conditioning or weak air-conditioning state, it is possible to easily respond to a request to increase the temperature by operating the switch when the temperature is cold. in this way,
When the switch is operated in the cold state in the cooling or weak cooling / heating state, a correction value of the reference value is selected, and normal control correction is performed.

Next, in a region on the right side of this region where the mixed door opening degree of the same motor voltage is 65 to 100%, only the d value for correcting the evaluation of the influence of the air velocity is doubled. As described above, in the strong heating state with a low air volume, the heating capacity by heating is limited. Therefore, the heating capacity is increased as a whole by increasing the air volume and increasing the influence of the warm air. That is, in winter, etc.
Since the air temperature is already in the high temperature range and the air flow velocity is relatively low, the influence of the air flow velocity is too small. Therefore, it is assumed that the switch has been operated when the temperature is cold, and the air flow correction is increased. Note that the motor voltage adjacent to the lower side of this region is 5.
5 to 7.5V and the mix door opening is 65 to 7.5V
In the region of 100%, the same correction value is obtained for the same reason.

When the motor voltage is 7.5 to 10.0 V or more at the lower side of the switch correction value table when it is cold,
In the region where the mixed door opening is 0 to 5%, the d value is similarly doubled, and the b value for correcting the influence evaluation of heat radiation such as solar radiation is 0. This is the maximum cooling in summer, etc., so the effects of heat radiation such as solar radiation can be neglected.However, it is considered that the switch was operated when it was too cold due to the relatively large air flow rate and it was cold. Impact assessment is increasing.

In the region on the right side of this region where the mixed door opening degree of the same high motor voltage is 5 to 65%, the air conditioner is in the weak heating and heating state with a high air volume, and thus this air volume is low. Since it is large, it is considered to be uncomfortable due to the feeling of cold, and the correction value is mainly based on the evaluation of the influence of the air volume.

In the region on the right side of this region where the motor door voltage is 10 V or more and the mixed door opening degree is 65 to 95%, the maximum air volume and the strong heating state are set, so correction by the influence of the air volume and heat radiation is performed. Is invalid, the correction is made only by the value a for correcting the influence evaluation of the temperature.

Finally, when the control state is at the lower right of the correction table, no correction is made, in which all correction values are zero. That is, the case where the motor voltage is 10.0 V or more and the mixed door opening is 95 to 100%, and the maximum motor voltage is a large mixed door opening. In such a state of the maximum air volume and the strongest heating, by operating the switch when the temperature is cold, even if the heating capacity is demanded, it cannot be executed effectively. As described above, since it is impossible to fulfill the request, when the effect of the coefficient correction is invalid, the correction of the control is prohibited to prevent the control balance from being adversely affected. Therefore, in these cases, the coefficient correction by the operation of the thermal sensation switch is prohibited, that is, a process of not correcting the coefficient is performed so that a good control balance can be maintained.

Next, in the hot weather switch correction value table,
The control state will be described in order from the upper left to the adjacent part.

First, when the control state is near the upper left of the correction table, the correction is mainly performed for evaluating the influence of heat radiation such as solar radiation. That is, the motor voltage is 5.0 to 5.5 V, and the mixed door opening is 0 to 65%. The correction value a for the temperature evaluation is 0 and the correction value b for the heat radiation is doubled. It is 0.2. At the time of such low air volume cooling or weak air conditioning,
By operating the switch when it is hot, it is possible to respond to a request to increase the cooling capacity and lower the indoor temperature. Also,
In this case, the cooling capacity is fully demonstrated,
While the effect of room temperature is considered low, the effect of solar radiation is considered to be large. In this way, when the switch is operated during hot weather during cooling or weak cooling / heating,
The control evaluation is mainly performed to evaluate the influence of thermal radiation.

When the control state is near the middle stage on the right side of the correction table, correction is mainly performed by the influence of temperature. That is, when the motor voltage is 5.5
~ 7.5V and the mix door opening is 65 ~ 1
The area is 00%, which is the middle / high mixed door opening of the low motor voltage. In such a low air volume heating or intense heating state, by operating the switch when it is hot, it is possible to easily respond to a request to lower the temperature. Also, in this state, when the switch is operated during hot weather, the air flow velocity is relatively low, and the influence of this air flow velocity is as follows.
Although it can be considered that there is almost no heat, it is considered that a feeling of heat is felt because the blowing temperature is high. Therefore, the influence of the temperature is the main control correction.

Further, when the control state is at the lower left of the correction table, the total correction value is 0 and no correction is performed. That is, the case where the motor voltage is 10.0 V or more and the mixed door opening is 0 to 5%, which is the minimum mixed door opening with the highest motor voltage. In such a state of the maximum air volume and the strongest cooling, if the switch is operated at the time of hot weather, even if the cooling capacity is requested, it cannot be executed efficiently. As described above, since the air-conditioning capacity is being fully utilized, the correction for further increasing the capacity is prohibited as an ineffective and harmful correction. Therefore, in this case, the coefficient correction by the switch operation is prohibited, that is, a process of not correcting the coefficient is performed, so that a good control balance can be maintained.

Finally, when the control state is near the lower right of the correction table, the correction value is a correction value obtained by doubling all the correction values. That is, the motor voltage is 7.5 to 10.0 V or more, and the mixed door opening is 65 to 100%, which is a relatively large mixed door opening with a high motor voltage. In this way, the influence of the feeling of heat due to the high blowing temperature is increased by the large air volume.
In a strong heating state, it is possible to easily respond to a request to weaken the heating capacity by operating a switch when the temperature is hot. In this case, the influence of heat radiation is also increased in consideration of the effect of heat retention of the seat on which the occupant is seated. Therefore, by setting the correction value to be a double value of all the correction values, it is possible to quickly and accurately respond to the request of the occupant.

As described above, when the air conditioner is in the intermediate state where there is enough capacity, the normal correction according to the request or the correction focusing on the factor causing the discomfort is performed. . Then, a request to decrease the ability at the time of exerting the maximum capacity or a request to increase the ability at the time of exerting the minimum capacity can respond quickly and appropriately by the doubled correction. Accordingly, the correction is performed by increasing the specific correction amount so that the effect of the switch operation by the occupant becomes more effective. On the other hand, when the maximum capacity is exhibited, a request for increasing the capacity cannot be met due to the capacity limitation of the air conditioner. Therefore, the modification of the control is prohibited to prevent the control balance from being lost. I have.

That is, when the effect of the modification is invalid,
While the modification is prohibited, if the effect of the modification is effective, a certain modification is doubled so that the effect is more effective. Therefore, a more effective correction is made according to the control state at that time.

As described above, when the thermal sensation switch 39 is pushed once, each evaluation coefficient of the equivalent temperature calculation equation is corrected according to the distinction between the switches and the control state at that time. Therefore, the calculation result of the equivalent temperature calculation formula becomes a value different from that before the correction, and the total value calculation means controls so as to reduce this difference. Is reflected in the air-conditioning control. For example, when the occupant feels the heat and operates the switch 39b when the temperature of the thermal sensation switch 39 is hot to lower the indoor temperature, some evaluation coefficients are increased by referring to the map, and the corrected arithmetic expression is used to calculate the equivalent. The temperature is calculated higher than before the correction. Then, the total value calculation means lowers the control temperature in order to match the increased equivalent temperature to a constant target temperature, so that the vehicle interior temperature becomes lower than before the switch operation.

When a certain thermal sensation switch operation is performed and a new switch operation is performed, the arithmetic expression is corrected by a correction value corresponding to the control state at that time, and correction of these coefficients is accumulated. It is supposed to. For example,
Motor voltage Vfan is 7V and mix door opening is 50%
In the case of the first time, there is an operation of the switch 39a when it is cold,
After that, when the motor voltage Vfan is 10 V and the mix door opening is 100%, when the switch 39b is operated in hot weather, the A value changes from the initial value of 0.55 to 0.54 and then increases to 0.54. 56.

Therefore, as described above, according to the second embodiment, not only the same effects as in the above embodiment can be obtained, but also the air volume control and the temperature control can respond to the control of the air conditioner which is independent. The range of application can be expanded.

[0085]

Thus, according to the present invention, a thermal sensation switch to which the occupant experiences sensation when he / she is uncomfortable, the distinction of the switch input referred to by this switch input, and the control of the blower control signal and the mixed door opening signal are controlled. By providing a coefficient correction map according to the state, by referring to the map based on the control information at the time of this switch operation and the bodily sensation input,
Each correction value is selected, and the corresponding evaluation coefficient in the equivalent temperature calculation equation is simultaneously and compoundly corrected by each correction value. That is, the actual internal / external environment is estimated from the control state as a result of evaluating the internal / external environment, and it is determined that the correction request of the air conditioning control is due to one or more environmental factors, and the evaluation of the arithmetic expression corresponding to this factor is performed. Has been corrected. Then, the equivalent temperature is corrected by the corrected arithmetic expression, and the air conditioner is driven and controlled by the integrated value calculating means based on the corrected equivalent temperature, so that the temperature inside the vehicle is changed.

Therefore, when the occupant operates the thermal sensation switch for insufficient comfort of the air-conditioning environment, the control information at the time of operating the switch and the correction value for each detection value according to the input of the thermal sensation switch Thus, each evaluation coefficient in the equivalent temperature calculation expression for evaluating and converting each detection value is simultaneously and compositely corrected. Thus, how the occupant evaluates the air-conditioning control currently in operation and the sensational tendency that varies from person to person can be incorporated into the equivalent temperature calculation formula.
Therefore, the operation of the correction can be easily performed only by the operation of the thermal sensation switch, since the evaluation tendency of the arithmetic expression conforms to the bodily sensation of the occupant. In addition, by correcting the evaluation tendency of the equivalent temperature calculation formula for estimating the occupant's bodily sensation, the calculated equivalent temperature is changed and the air conditioning is controlled to a new temperature. No change is required, and the overall balance of the control can be favorably maintained.

Further, since the correction corresponding to the control state at the time of operating the switch and the request of the occupant is performed, when the effect of the correction becomes invalid, the correction is prohibited and the control becomes unbalanced. Can be prevented. Further, it is presumed that the occupant is uncomfortable because the effect of a certain control such as the air volume is excessive, and the evaluation of this effect is increased, and this excessive effect can be immediately reduced. The effect of the correction by the operation can be made more effective. That is, it is possible to perform a control correction that quickly and reliably responds to a passenger's request, improve the actual efficiency of the control correction, and improve the performance of the air conditioner.

In addition, the influence on the bodily sensation is determined for each environment such as solar radiation. However, it is determined comprehensively as a result of a plurality of influences, and correction of a composite influence evaluation that is related to each other is performed. As a result, advanced air conditioning control is performed in a more integrated manner, and performance can be further improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a vehicle air conditioner according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an operation panel of the air conditioner.

FIG. 3 is a flowchart showing an overall process of controlling the air conditioner.

FIG. 4 is a characteristic diagram for obtaining a clothing amount from an outside air temperature.

FIG. 5 is a flowchart showing a process of correcting the evaluation coefficients A, B, and D of the equivalent temperature calculation expression and the set display temperature.

FIG. 6 is an evaluation coefficient correction value a, which corrects the equivalent temperature calculation expression.
b, d, and a map for obtaining the setting display correction value Ts.

FIG. 7 is a map for obtaining evaluation coefficient correction values a, b, and d for correcting an equivalent temperature calculation expression and a setting display correction value Ts according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vehicle air conditioner 11 Duct 12 Control unit (correction means) 16 Ventilation blower 16a Electric motor 33 Operation panel 37 Auto mode switch 39 Thermal sensation switch 39a Cold switch 39b Hot switch 42 Outside air temperature sensor 43 Inside air temperature sensor 44 Solar radiation sensor 54 Variable resistor Tamb Outside air temperature Tinc Inside air temperature Qsn Detected solar radiation Teq Equivalent temperature Tref Target temperature X Total operation value A Temperature evaluation coefficient B Solar radiation evaluation coefficient D Air velocity evaluation coefficient F Target temperature correction value a Temperature correction value b Solar radiation evaluation correction value d Air flow velocity evaluation correction value Ts Setting display correction value

Claims (1)

(57) [Claims] An insolation sensor for detecting an amount of insolation, a temperature sensor inside and outside of a vehicle, a blower disposed in an air conditioning duct, and a mixing ratio of cold air and hot air in the duct are adjusted by increasing or decreasing an opening angle. An air conditioner for a vehicle having a mixed door that is changed, a thermal sensation switch operated when an occupant feels hot or cold, and a predetermined equivalent temperature calculation formula based on detection values of various sensors. An equivalent temperature calculating means for calculating an equivalent temperature according to: a total value calculating means for calculating a total control value based on the equivalent temperature and a preset target temperature; and A correction value corresponding to each detection value is set based on control means for driving control, a blower control signal and a mixed door opening signal of the total value calculation means, and a switch input of the thermal sensation switch. Evaluation coefficient correction means for selecting each correction value according to the state of the air conditioning control at the time of operating the switch with reference to the map, and correcting each evaluation coefficient in the equivalent temperature calculation expression. A vehicle air conditioner characterized by the above-mentioned.