JP2943589B2 - Automotive air conditioners - 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.

[0002]

2. Description of the Related Art In recent years, using a microcomputer,
Based on information from various sensors installed inside and outside the vehicle, the number of rotations of the mix damper and blower motor that regulates the temperature of air blown into the vehicle interior is automatically controlled, reducing the driver's operation frequency and improving safety and comfort. The air conditioning control is improved.

A conventional air conditioner for a vehicle of this type is disclosed, for example, in JP-A-3-279012.

FIG. 10 is a block diagram of a conventional air conditioner for a vehicle. Operation information from the operation panel 2 and sensor inputs such as the outside air sensor 3 and the room temperature sensor 4 are input to the control device 1, and a mix damper 5 for adjusting the blowing temperature, a blower motor 6 for blowing air, and compressing the refrigerant. A compressor 7, a mode damper 8 for selecting an outlet, an intake damper 9 for selecting an intake port, and the like are connected as outputs.

FIG. 11 is a front view of the operation panel 2. The auto switch 11 is a switch for setting all controls of the mix damper 5, the blower motor 6, the compressor 7, the mode damper 8, the intake damper 9 and the like to the "AUTO" mode.

The mode switch 12 sets the control of the mode damper 8 to the "MANUAL" mode. Every time the mode switch 12 is pressed, the location at which the wind blows changes to VENT-B / L-HEAT-H / D.

The fan switch 13 controls the blower motor 6 in a "MANUAL" mode, that is, the blower motor 6
The voltage of the blower motor 6 changes to Lo-M1-M2-HI each time the switch is pressed, and returns to Lo when pressed again.

The air conditioner switch 14 sets the control of the air conditioner to the "MANUAL" mode.
/ C-ECO (economic operation) -OFF and the control mode of the air conditioner change.

The intake switch 15 changes the control of the intake damper 9 to the "MANUAL" mode, and changes to REC-FRESH each time the switch is pressed.

The set temperature switches 16a and 16b change the set temperature. When the set temperature switch 16a is pressed, the temperature increases by 0.5 ° C, and when the 16b is pressed, the temperature decreases by 0.5 ° C.

The display panel 17 has a set temperature, a blower motor voltage, an inlet (REC, FRESH) and an outlet (VEN).
T, HEAT, etc.) and air conditioners (A / C, ECO) are displayed.

The differential switch 18 is a switch for performing a defroster control for removing fogging. The off switch 19 is a switch for stopping control of the blower motor 6 and the compressor 7.

In the control device 1, a mix damper 5, a mix damper 5,
By driving the blower motor 6, the compressor 7, the mode damper 8, the intake damper 9 and the like, and controlling the blowout temperature, the air volume, the suction port, the blowout port, etc., the interior of the vehicle is made comfortable.

[0014]

However, in the above configuration, when the set temperature is changed, the blowout temperature and the air volume are changed regardless of the state of the vehicle interior. Originally, the set temperature is designed in consideration of changing the temperature in a stable state, and if the temperature is changed while the temperature is stable, various problems occur. For example, if the occupant feels cold when the air conditioning has just started and the inside of the car is not yet sufficiently stable, and the set temperature is raised, it will become hot when the time becomes stable and the set temperature must be lowered. Have to be. Also, if the temperature is suddenly cooled or warmed, it takes time for the body to adjust, and if the set temperature is changed during that time, the body must be fully adjusted and the setting must be changed again.

[0015] When the vehicle is stabilized in a slightly cold state, the occupant may judge that the occupant has not warmed up yet, although the set temperature should be raised originally, the occupant may perform gaman as it is.

Although the set temperature changes only by 0.5 ° C. in one operation, there is a case where the set temperature needs to be changed after a while again in practice.

Further, when the engine water temperature is low and the heating capacity is insufficient and the outlet temperature is not yet sufficiently high, or when the cooling capacity is insufficient under the hot summer sun or the like, the occupant may change the set temperature. It doesn't get better, so it can be frustrating or mistaken for a breakdown.

Further, since the mix damper is automatically controlled, it is not possible to operate the mix damper when it is desired to perform air-conditioning quickly even if the feeling is sacrificed, or when normal control is stopped due to a sensor failure. In addition, there is a problem that if the heating cannot be performed in winter or the like, the life of the occupant may be dangerous.

The present invention solves the above-mentioned problems of the prior art, and enables the occupant to easily select a desired empty space without performing unnecessary operations.
Adjustable air condition can be set, and the air condition can be quickly and efficiently realized without irritating the occupants, and even if normal air conditioning cannot be performed due to sensor failure etc., minimum air conditioning is performed. It is an object of the present invention to provide a safe air conditioner for a vehicle that can perform the operation.

[0020]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an instruction operation when a person in a vehicle interior feels cold.
Feeling and the feeling rising command means, and the passenger compartment of the people are hot that
And feeling descent command means for instructing operation when the Flip, place
Deviation between the constant target temperature and the current temperature in the cabin, or at a fixed time
The amount of temperature change in the cabin within the interval is within a predetermined range
And stability determining means for determining whether a stable state, wherein when the feeling increased command means or the feeling descent command means by Ri directive is output, in response to and stable state determined by the stability determination means, control A control constant determining means for determining a control constant to be used, and information such as outside air temperature and vehicle interior temperature, a mix damper for adjusting the temperature of air blown into the vehicle interior using a control constant of the control constant determining means ,
The apparatus is provided with control means for automatically controlling the number of revolutions of a blower motor for adjusting the air volume.

[0021] Further, the control constant determining means, when the feeling increased command means or the feeling descent command means <br/> by Ri directive is output, the transition period and time immediately after the air conditioner is started elapsed Control constants to distinguish from stable
It is to be determined .

The apparatus further comprises a stability display means for displaying a stable state determined by the stability determination means.

[0023] If further room has been output is still stable when it is determined not to have the feeling elevated command means and the feeling descent command means by Ri Directive by the stability judgment means, the room is still stable Message display means for displaying a message notifying that the message has not been sent.

Furthermore the feeling raising means or these fingers <br/> age many air volume of the blower motor or securing said mixing damper to a full hot blowout temperature becomes highest when output over a certain time period whereas if either is, or the MAX HOT means for performing both fixed to the mix damper when the feeling lowering means or these directive is output a predetermined time or more full cold blowout temperature becomes lowest And / or an increase in the air volume of the blower motor, or one or both of MAX COLD means for performing both.

[0025]

According to the present invention, by providing the feeling increasing command means and the feeling decreasing command means, it is possible to judge how the occupant feels at present. Further, stability determining means for determining a stable state in the vehicle compartment, control constant determining means for changing a control constant used for control based on the stable state and an output from the feeling increasing command means or the feeling decreasing command means, and the control thereof. By providing the control means that performs control using a constant, an accurate process can be performed even when the setting is changed in an unstable state, and the air conditioning state desired by the occupant can be realized quickly and efficiently.

Further, by providing a stable display means for displaying a stable state, the occupant can view the current temperature in the passenger compartment as the target temperature.
Temperature change amount is close to degrees and stable
Stability with large deviation from temperature and large temperature change
It is possible to know whether it is on the way, and there is no need to perform unnecessary operations or wait while waiting for a stable operation in cold conditions.

Further, by providing a message means for notifying that the room is not yet stable when a feeling up or down command is output when it is not stable, it is possible to eliminate irritation and unnecessary operations. Can be.

Further, MAX HOT means and MAX CO
By providing the LD means, even when normal air conditioning is not performed due to a sensor failure or the like, minimum air conditioning can be performed.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An air conditioner for a vehicle according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an air conditioner for a vehicle showing one embodiment of the present invention. The same parts as in the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

The controller 1a comprises a stability judging means 24, a control constant determining means 25, a control means 26, a MAX HOT means 2
7. MAX COLD means 28. The control device 1a includes various sensors such as an outside air sensor and an operation panel 2.
a is input, and as outputs, a mix damper 5, a blower motor 6, a compressor 7, a mode damper 8, and an intake damper 9 are connected.

FIG. 2 is a front view of the operation panel 2a. The difference from the conventional example is that the set temperature switches 16a and 16b are replaced with a feeling-up commanding unit 20 and a feeling-down commanding unit 21, and the display of the set temperature on the display panel 17a is replaced with a stable display unit 22. That is, the message display means 23 is added. Feeling up command means 20 and feeling down command means 21
If the current air conditioning condition is cold or hot
A switch that operates with the feeling that it outputs a rise or fall command only while it is pressed.

The MAX HOT means 27 outputs a MAX HOT request if the output from the feeling increasing instruction means 20 is longer than a predetermined time, that is, if the feeling rising instruction is pressed for more than a predetermined time.

Similarly, the MAX COLD means 28 outputs a MAX COLD request when the output from the feeling descending instruction means 21 is longer than a predetermined time.

FIG. 3 is a flowchart of the control by the control means 26. The control unit 26 receives various sensors, switch information of the operation panel, control constants output from the control constant determination unit 25, and outputs of the MAX HOT unit 27 and the MAX COLD unit 28.

First, at step 100, the MAX HOT request is checked, and if there is a request, at step 101, the mix damper 3 is fixed at full hot where the blowout temperature is the highest, and the blower motor voltage is made maximum. Step 102
Then, the MAX COLD request is checked, and if there is a request, in step 103, the blowout temperature is fixed to the full cold where it becomes the lowest, and the blower motor voltage is made the highest.

If neither request is present, step 10
Proceed to 4. Hereinafter, mix damper control, blower motor control, air conditioner control, mode damper control, and intake damper control are performed.

Next, the mix damper control in step 104 will be described in more detail. In controlling the mix damper, the target temperature Tm, the deviation correction coefficient Kn, and the solar radiation correction coefficient Ks output from the control constant determining means 25 as control constants.
Use

The mix damper opening Mx is obtained by subtracting the solar radiation correction Ms from the sum of the basic opening Mk and the deviation correction Mn, that is, Mx = Mk + Mn-Ms (1).

The blowout temperature of the mix damper increases as the opening degree increases. Therefore, 0% is on the COLD side where the blowing temperature is the lowest, and 100% is on the HOT side where the blowing temperature is the highest.

The basic opening Mk is determined by the outside air temperature, the target temperature Tm, and the mode of the air conditioner. FIG. 4 shows the target temperature Tm.
= 25 ° C., the basic opening characteristics of the mix damper when the air conditioner is ON. The horizontal axis represents the outside air temperature, and the vertical axis represents the basic opening degree Mk. For example, outside air 0 ° C., target temperature Tm = 25 ° C.
Is 75%.

Next, the deviation correction Mn is obtained by Mn = Kn × (target temperature Tm−room temperature) (2). Kn is a deviation correction coefficient.

FIG. 5 is a characteristic diagram of the deviation correction of the mix damper when the deviation correction coefficient Kn is set to 5. The horizontal axis is (target temperature Tm-room temperature), and the vertical axis is deviation correction Mn. The case where (target temperature Tm−room temperature) is negative means that the room temperature is higher than the target temperature Tm, so that it is necessary to lower the blowout temperature in order to lower the room temperature, so the mix damper is corrected to the minus side. .

Next, the solar radiation correction Ms is obtained by the following equation: Ms = Ks × solar radiation amount (3) Ms increases as the insolation increases, and the mix damper is corrected to the negative side according to equation (1).
The blowing temperature decreases.

From these equations, the outside air is 0 ° C. and the indoor temperature is 20 ° C.
° C, solar radiation 500 (KCAL / m2 · h), air conditioner =
Try to find a mix damper when it is ON. Set the control constant to T
Assuming that m = 25 ° C., Kn = 5, and Ks = 0.03, the basic opening Mk = 75% from the figure, and the deviation correction Mn is Mn = 5 × (25−20) = 25% from the equation (2), From the equation (3), the solar radiation correction Ms is Ms = 0.03 × 500 = 15.
% From the equation (1),
x = 75 + 25−15 = 85%.

As described above, the control constant determining means 25
It is possible to change the state of the room in various ways by the control constant output from. For example, when the target temperature Tm is changed, a stable state, that is, the temperature when (target temperature Tm−room temperature) = 0 is changed. Good. When the deviation correction coefficient Kn is changed (the target temperature Tm−
The temperature at the time of (room temperature) = 0 remains unchanged and the target temperature Tm
If the feeling change command is issued during the transition period that is not yet stable because the temperature in the transition period approaching the temperature changes, it may be changed.

The stability judging means 24 outputs the deviation Td and the stabilizing time to the control constant determining means 25. Deviation T
d is (mix target temperature Tm-room temperature), and the stabilization time is a time that has elapsed since the change in the deviation Td became equal to or less than a predetermined value.

Next, the control constant determining means 25 will be described. The control constant determining means 25 determines whether the feeling increasing command or the feeling decreasing command has been pressed, and determines whether the transition period immediately after the start of air conditioning or the stable period after a certain period of time, and controls the target temperature Tm and the deviation correction coefficient Kn. Means 26
Output to

FIG. 6 is a flowchart for determining the control constant of the control constant determining means 25. When a feeling up command or a feeling down command is input in step 200, it is determined which is pressed in step 201, and in the case of the feeling up command, to step 202,
If the command is a feeling down command, the process proceeds to step 203.
In steps 202 and 203, it is determined whether the transition period is less than 20 minutes after the start of the air conditioning or a stable period more than 20 minutes after the start of the air conditioning. If the period is stable, the process proceeds to steps 205 and 207. Here, the increase and decrease of the target temperature Tm and the deviation correction coefficient Kn are obtained, and in step 208, the target temperature Tm and the deviation correction coefficient Kn are calculated.

FIG. 7 is an output matrix of the transient period of the feeling lowering command of step 206, and FIG. 8 is an output matrix of the stable period of the feeling lowering command of step 207. The vertical axis is the stabilization time, and the horizontal axis is the deviation Td. In the matrix, the target temperature Tm and the deviation correction coefficient Kn are represented by the increase and decrease respectively.

Now, the basic concept of the output matrix will be described with reference to FIGS. First, the same parts will be described in the transition period and the stable period.
In the case of No. 4, etc., the (target temperature Tm-room temperature) is almost the target temperature of -1 to +1 and the stabilization time is as short as 0 to 3 minutes. In such a state, the body does not adapt to the temperature, and if the feeling lowering command is issued at such a time, the body adapts even if the target temperature Tm or the deviation correction coefficient Kn is changed. Since the temperature becomes cold and a feeling increase command is issued, neither the target temperature Tm nor the deviation correction coefficient Kn is changed in this region. However, even if the same stabilization time is 0 to 3 minutes, in (A12) where the (target temperature Tm-room temperature) is large on the negative side, only the deviation correction coefficient Kn is changed in order to satisfy the demand that the temperature of the occupant be lowered due to the hot weather. . On the other hand, the reason why the feeling lowering command is issued even though the temperature is sufficiently lower than the target temperature, such as A15 or A16 on the + side, is considered to be due to the deviation of the target temperature Tm. I do.

Next, even if (target temperature Tm-room temperature) is -1 to +1 such as A23, A24, A33, and A34, it is considered that the body adapts if the stabilization time becomes longer. It is considered that the feeling lowering command is issued because the target temperature Tm is shifted, so the target temperature Tm is lowered.

Next, a portion having a difference between the transition period and the stable period will be described. In the transition period A11, (target temperature Tm-room temperature) is -10 to -5, and the room temperature is higher than the set temperature, that is, the room is hot. However, in the transition period, the further stabilization time of 0 to 3 minutes is considered to be due to the state where the air conditioning has just been started and the room is not stabilized and the temperature is being lowered. If the target temperature Tm is changed at this time, it becomes too cold after stabilization. However, if you do nothing, you will not be able to respond to the demands of the occupants who want to lower their feelings, which will cause discomfort. Therefore, the deviation correction coefficient Kn is incremented by 1 to increase the deviation correction amount Mn toward the cooling side. If (target temperature Tm−room temperature) is −10 ° C., if the deviation correction coefficient Kn is increased by 1, the deviation correction Mn changes by −10%, the mix damper moves 10% to the COLD side, and the blowout temperature decreases. (Target temperature Tm
If (room temperature) = 0, the deviation correction Mn = 0, so there is no influence.

However, even under the same conditions, in B11 in the stable period,
The fact that there is a difference of -10 to -5 even after 20 minutes or more is considered to be a state in which a considerable capacity is insufficient, so the target temperature Tm is also changed. A21, A31, A4
1 is the same.

Next, the display of the operation 2a will be described. First, the stable display means 22 has a display of "OK" at the center, and arrows are arranged from above and below toward "OK". FIG. 9 is a display example of the stable display means 22. First, when only "OK" is displayed, the target temperature Tm and the room temperature are almost the same. If it is cold or hot even in such a state, the occupant may determine that the target temperature is not in his / her comfortable air-conditioning state and operate the feeling increasing means or the feeling decreasing means. If the number of arrows increases, it can be understood that the room temperature is being controlled, and the occupant may look at the state for a while until approaching "OK".

The message display means 23 indicates when the (set temperature Tm-room temperature) is large immediately after the start of air conditioning, when the engine water temperature is low and the heating capacity is insufficient and the outlet temperature is not yet sufficiently high, When a feeling up command or a feeling down command is issued while the cooling capacity is insufficient in the hot summer weather etc., a message such as `` Please wait for a while '' is displayed and a feeling command is issued to the occupant. Also indicates that his or her ability is at its limit.

In this embodiment, the control of the mix damper has been described only. However, it goes without saying that the blower motor, the mode damper, the intake damper, and the air conditioner can be controlled with the same configuration.

[0058]

As apparent from the above description, the present invention provides a feeling raising means and a feeling lowering means in place of the set temperature means, and performs control based on the information and the stable state of the room. The occupant can easily bring the passenger compartment into a comfortable state.

Further, by displaying a stable state or displaying a message when the feeling is changed during the stabilization or when the feeling is poor due to the limit of the ability, the occupant may be irritated or perform unnecessary operations. Can be prevented.

Further, MAX HOT, MAX COLD
By providing the means, why do you want to warm up no longer,
The demand for cooling can be satisfied, and the minimum air conditioning can be performed even in the case of a sensor failure or the like.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an automotive air conditioner showing one embodiment of the present invention.

FIG. 2 is a front view of the operation panel 2a.

FIG. 3 is a flowchart of control by the control means 26;

FIG. 4 is a basic opening characteristic diagram of the mixed damper.

FIG. 5 is a diagram showing a deviation correction characteristic of the mixed damper.

FIG. 6 is a flowchart for determining a control constant of the control constant determining means 15;

FIG. 7 is an output matrix diagram of a transition period of the feeling descending command.

FIG. 8 is an output matrix diagram of the feeling down command in a stable period.

FIG. 9 is a display list diagram of the stable display means 22.

FIG. 10 is a block diagram of a conventional air conditioner for a vehicle.

FIG. 11 is a front view of the operation panel 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a Control device 2, 2a Operation panel 3 Outside air sensor 4 Room temperature sensor 5 Mix damper 6 Blower motor 7 Compressor 8 Mode damper 9 Intake damper 11 Auto switch 12 Mode switch 13 Fan switch 14 Air conditioner switch 15 Intake switch 16a, 16b Set temperature switch 17, 17a Display panel 18 Differential switch 19 Off switch 20 Feeling raising means 21 Feeling lowering means 22 Stable display means 23 Message display means

Claims (5)

(57) [Claims] 1. An instruction operation when a person in the vehicle interior feels cold
A feeling-up commanding means for instructing when a person in the cabin feels hot ; a deviation between a predetermined target temperature and the current temperature in the cabin, or a constant
The temperature change in the cabin within the time is within the specified range.
That a stable determination means for determining whether a stable state, wherein when the feeling increased command means or the feeling descent command means by Ri directive is output, in response to and stable state determined by the stability determination means, A control constant determining means for determining a control constant to be used for control, and a mix damper for adjusting the temperature of air blown into the vehicle interior using a control constant of the control constant determining means based on information such as an outside air temperature and a vehicle interior temperature. , automotive air conditioning apparatus comprising a control means for automatically controlling the rotational speed of the blower motor to regulate the air flow. Wherein control constant determining means, the feeling elevated command means or the feeling descent command means by Ri directive when is output, stable life transition and time immediately after the air conditioner is started has elapsed To distinguish
The automotive air conditioner according to claim 1 , wherein the control constant is determined . 3. The air conditioner for a vehicle according to claim 1, further comprising a stability display means for displaying a stable state determined by the stability determination means. If wherein stable determination means by the Ri by feeling increase command means and the feeling descent command means Directive when it is determined that the room is not yet stable is output, the indoor is still stable 2. The air conditioner for a vehicle according to claim 1, further comprising a message display unit for displaying a message notifying that the vehicle has not been turned on. 5. Which feeling lifting means or these directive is to increase the air volume of the blower motor or securing said mixing damper to a full hot blowout temperature becomes highest when output over a certain time period or the other, or the MAX HOT means that both, the or the feeling lowering means or these directive secures full cold to the mixing damper air temperature becomes lowest when output over a certain time the blower motor MA to increase one or both of the airflow
2. The air conditioner for a vehicle according to claim 1, further comprising one or both of X COLD means.