JP2817291B2 - Vehicle air conditioning controller - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air-conditioning control device, and more particularly to giving a sense of incongruity due to a temperature difference between a vehicle exterior temperature and a vehicle interior temperature when starting driving of an air-conditioning mechanism. The present invention relates to a vehicle air-conditioning control device capable of preventing the occurrence of an air conditioner, improving responsiveness to a set vehicle interior temperature, and simplifying the configuration.

[Conventional technology]

In vehicles, in order to provide a comfortable environment for occupants in all climates, driving conditions, etc., to prevent fogging and frost on windows, to ensure driver visibility, and to enable comfortable and safe driving. , An air conditioning control device is provided.

This air-conditioning control device includes an inside air introduction passage for introducing inside air, which is vehicle interior air, and an outside air introduction passage for introducing outside air, which is outside vehicle interior, at an upstream end of an air conditioning air passage to constitute a temperature control unit. The inside air introduction passage and the outside air introduction passage are switched and opened and closed by the inside / outside air switching damper, and the cooling air evaporator, the heating heater core, and the temperature adjustment An air mix damper and a blower fan for blowing air are provided, and a plurality of blow-out passages for blowing air-conditioning air to respective parts of the vehicle compartment are provided at a downstream end side of the air-conditioning air passage to constitute a blow-out portion. And an air-conditioning mechanism comprising a temperature control section and a blow-out section, and control means for controlling the driving of the air-conditioning mechanism.

In such an air conditioning control device, for example, as shown in FIG.
2, the outside temperature of the outside air, which is outside air from the outside temperature sensor 304, and the set interior temperature from the set temperature switch 306 are input to the outside temperature correction unit 308, and the set interior temperature and the interior The actual vehicle interior temperature from the temperature sensor 310 is input to the temperature deviation calculation unit 312, and the amount of insolation from the insolation sensor 314 is input to the insolation correction unit 316,
Each output signal from the outside air temperature correction unit 308, the temperature deviation calculation unit 312, and the solar radiation correction unit 316 is input to the air conditioning control unit 318, and the control unit 318 corresponding to the calculated value obtained by the air conditioning control unit 318 In some cases, the blower fan 322 of the air-conditioning mechanism 320 is driven and the air mix damper 324 is actuated by a control signal from the air conditioner 320 to change the vehicle interior temperature to adjust the environmental condition.

Further, an air-conditioning control device for improving a vehicle interior environmental condition is disclosed in, for example, Japanese Utility Model Laid-Open No. 59-89711. The device described in this publication controls the opening and closing of a window according to the temperature in the vehicle compartment, and closes the window when a signal from a raindrop sensor is received.

[Problems to be solved by the invention]

By the way, in the conventional air-conditioning control device, the window is opened and closed according to the vehicle interior temperature state. For example, when the vehicle interior temperature exceeds a predetermined value due to solar radiation, the window is automatically opened. In other words, when the windows are opened only in accordance with the vehicle interior temperature, when the outside air temperature, which is the vehicle exterior temperature, is lower than the vehicle interior temperature in a season such as spring or autumn, the vehicle interior temperature becomes a predetermined value due to solar radiation or the like. If the air temperature exceeds this value, the windows will be opened when the temperature of the outside of the vehicle compartment is low when the air-conditioning mechanism is started, and cold outside air will be introduced into the warm interior of the vehicle. In addition to the inconvenience of providing the windows, the windows are opened earlier than necessary, so if the difference between the outside temperature and the inside temperature of the vehicle is large, it causes disturbance in the vehicle interior environment and disrupts the air conditioning control. Therefore, it takes a long time to reach the set vehicle interior temperature when the vehicle interior temperature is lowered and controlled to the set vehicle interior temperature by driving the air conditioning mechanism, and the response to the set vehicle interior temperature is deteriorated. Inconvenience And (indicated by a broken line N of Figure 5).

[Object of the invention]

Therefore, an object of the present invention is to eliminate the above-described disadvantages by controlling the opening and closing of the opening in consideration of the temperature outside the vehicle compartment when starting the driving of the air conditioning mechanism. While preventing a sense of incongruity due to the temperature difference between the outdoor temperature and the vehicle interior temperature, the opening is opened only when the temperature difference between the vehicle exterior temperature and the set vehicle interior temperature is equal to or greater than a certain value, thereby reducing the temperature to the set vehicle interior temperature. It is an object of the present invention to provide a vehicle air-conditioning control device capable of improving responsiveness and simplifying the configuration without changing the air-conditioning mechanism.

[Means for solving the problem]

In order to achieve this object, the present invention relates to a vehicle air conditioning control device that controls opening and closing of an opening by opening and closing an opening and closing body to adjust a vehicle interior environment state, and controls driving of an air conditioning mechanism. If the opening / closing operation command of the opening / closing body has not been issued at least once at the start of driving, the vehicle exterior temperature exceeds the set vehicle interior temperature and becomes a predetermined value or more, and the vehicle exterior temperature and the set vehicle interior temperature And operating the opening and closing body to open the opening when the temperature difference between the opening and closing is equal to or more than a predetermined value, and operating the opening and closing body to inform the opening after a lapse of a predetermined time from the opening operation of the opening and closing body. A control means is provided.

[Action]

According to the configuration of the present invention, the control means inputs the outside temperature and the set interior temperature at the time of starting the driving of the air conditioning mechanism, and the opening / closing operation command of the opening / closing body has not been issued even once. In this case, the opening / closing body is operated to close the opening when the temperature outside the vehicle compartment exceeds the set vehicle interior temperature and becomes a predetermined value or more and the temperature difference between the vehicle exterior temperature and the set vehicle interior temperature is a certain value or more. After a lapse of a predetermined time from the opening operation of the opening / closing body, the opening / closing body is operated to open the opening. Accordingly, if the opening / closing operation command of the opening / closing member has been issued at least once before the start of the driving of the air conditioning mechanism, the vehicle interior temperature can be brought to the set vehicle interior temperature sufficiently quickly by the automatic air conditioning capability. ,
In addition, since the opening is opened when the temperature outside the vehicle compartment is equal to or higher than the predetermined value, it is possible to prevent giving a sense of incongruity due to a temperature difference between the temperature outside the vehicle compartment and the temperature inside the vehicle compartment, and even when the temperature outside the vehicle compartment is lower than the temperature inside the vehicle compartment. The opening is opened when the temperature difference between the outside temperature of the vehicle and the set temperature inside the vehicle is equal to or more than a certain value, so that the temperature inside the vehicle becomes faster until it reaches the temperature inside the vehicle, improving the responsiveness to the temperature inside the vehicle. Moreover, since it is not necessary to change the existing air-conditioning mechanism for the air-conditioning control, the configuration can be simplified.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail and specifically with reference to the drawings.

1 to 5 show a first embodiment of the present invention. In the figure, reference numeral 2 denotes an air conditioning control device for a vehicle. The air-conditioning control device 2 includes an air-conditioning mechanism 8 including a temperature control unit 4 and a blowing unit 6.

In the temperature control section 4, an inside air introduction passage 10 for introducing inside air as vehicle interior air and an outside air introduction passage 12 for introducing outside air as exterior air inside the vehicle assemble and communicate with an upstream side of an air conditioning air passage 14. doing. The inside air introduction passage 10 and the outside air introduction passage 12 are switched and opened and closed by the turning operation of the inside / outside air switching damper 16. In the air conditioning air passage 14, a blower fan 18, an evaporator 20, an air mix damper 22, and a heater core 24 are arranged in this order from the inside / outside air switching damper 16 side.

In the outlet section 6, a defroster outlet 26, a vent outlet 28, and a foot outlet 30 are branched and communicate with each other on the downstream side of the air conditioning air passage 14. The defroster outlet 26 is opened and closed by the rotation of the defroster outlet damper 32, and the vent outlet 34 is connected to the vent outlet damper 34.
The foot outlet 30 is opened and closed by the rotation of the foot outlet damper 36.

The driving of the air conditioning mechanism 8 is controlled by a control unit 38.

The control means 38 includes, as an input side, an outside air temperature sensor 40 for detecting the outside air temperature outside the vehicle compartment, a vehicle interior temperature sensor 42 for detecting the vehicle interior temperature, and a temperature setting switch 44 for adjusting the set vehicle interior temperature. And a solar radiation sensor 46 for detecting the amount of solar radiation
And the air conditioner 8 as the output side
At least with the blower fan 18 and the air mix damper 22, and further with the opening / closing body 50 via the opening / closing body motor 48.

This opening / closing body 50 is a power window for opening and closing a window in a vehicle having a power window, or a sunroof for opening and closing a sunroof opening of a roof in a vehicle having a sunroof.

As shown in FIG. 2, the control means 38 includes an opening / closing body opening / closing determination section 52 in which an outside air temperature sensor 40 and a temperature setting switch 44 communicate with each other to control the opening / closing of the opening / closing body 50. An opening / closing body opening / closing control section 54 that outputs a control signal to the opening / closing body motor 48 in communication with the opening / closing determination section 52 is provided.

The block diagram of the control system shown in FIG. 2 is added to the block diagram of the control system shown in FIG.
The block diagram shown in FIG.

That is, as shown in FIG. 3, the control means 38 is provided with an opening / closing body opening / closing determination section 52 and an opening / closing body opening / closing control section 54 in communication with each other, and an outside air temperature correction section 56 and a temperature deviation calculation section 58. And the solar radiation correcting unit 60 communicate with the air conditioning control unit 62, respectively. An outside air temperature sensor 40 and a temperature setting switch 44 are in communication with the open / close body open / close determination unit 52. The outside air temperature correction unit 56
The outside air temperature sensor 40 and the vehicle interior temperature sensor 42 are in communication with each other. The temperature deviation calculator 58 is in communication with the temperature setting switch 44 and the vehicle interior temperature sensor 42. The solar radiation sensor 46 is in communication with the solar radiation correcting unit 60.

In FIG. 3, the opening / closing body motor 48 communicates with the opening / closing body opening / closing control section 54 as an output side, and the groin fan 18 and the air mix damper 22 communicate with the air conditioning control section 62.

The control means 42 receives each signal from the input side, controls the driving of at least the blower fan 18 and the air mix damper 22 of the air conditioning mechanism 8, and opens and closes the opening / closing body 50 when the driving of the air conditioning mechanism 8 is started. If the operation command has not been issued at least once before, the temperature outside the vehicle compartment exceeds the set vehicle interior temperature and becomes a predetermined value or more, and the temperature difference between the vehicle exterior temperature and the set vehicle interior temperature becomes a predetermined value or more. In this case, the opening / closing body 50 is operated to open a window or a sunroof opening (not shown) which is an opening, and the opening / closing body 50 is opened after a lapse of a predetermined time from the opening operation of the opening / closing body 50. Work,
It adjusts the vehicle interior environment state.

The predetermined value of the vehicle exterior temperature is, for example, a temperature higher than the set vehicle interior temperature and a temperature at which the outside air does not make the occupant feel cold even when the opening / closing body 50 is opened.

Further, the temperature difference between the outside temperature of the vehicle compartment and the temperature of the vehicle compartment is equal to or more than a predetermined value, for example, when the opening / closing member 50 is opened, the outside air can reduce the vehicle interior temperature to the set vehicle interior temperature more quickly. Value.

Next, the operation of the first embodiment will be described with reference to FIG.
(B) and FIGS. 5 (a), (b),
A description will be given based on the time chart of FIG.

The main routine of the normal automatic air-conditioning control is executed as shown in FIG. That is, when the driving of the air conditioning mechanism 8 is started, the program starts (step 102).
First, initial settings are made (step 104), and signals such as the set vehicle interior temperature and the outdoor temperature, that is, the outdoor temperature, the actual vehicle interior temperature, and the amount of solar radiation, are input (step 10).
6).

Next, in the temperature deviation calculating section 56, the temperature deviation θe
Is calculated as θe = (set vehicle interior temperature) − (vehicle interior temperature) (step 108).

Then, the outside air temperature correction unit 56 calculates the outside air temperature correction value θa as follows: θa = ka × {(vehicle interior temperature) − (outside air temperature)}. (Step 110).

 Then, the solar radiation correction unit 60 calculates the solar radiation correction value θs by the following formula: θs = ka × (solar radiation amount) (step 112).

Further, the air-conditioning control unit 62 changes an air-conditioning control value u, which is a control signal of the air-conditioning mechanism 8, by, for example, proportional integral differentiation (PID) control. Calculation is performed using kp: proportional coefficient k _I : integral coefficient k _D : differential coefficient (step 114).

Then, a map calculation, that is, the rotation speed of the blower fan 18 and the angle of the air mix damper 22 are obtained from a map (not shown) based on the air conditioning control value u (step 116).

Next, a signal for driving the blower fan 18 is output from the air conditioning control unit 62, and a signal for driving the air mix damper 22 is output from the air conditioning control unit 62 (step 11).
8) Return to step 106 described above.

In such automatic air-conditioning control, a subroutine shown in FIG. 4 (b) is called for each round of the main routine.

Therefore, in this embodiment, 1 is set in the main routine.
If the opening / closing operation command of the opening / closing body 50 has been issued at any time, that is, if the opening / closing operation of the opening / closing body 50 is performed once, the subroutine control is not performed again. The reason for this is that if the opening / closing operation of the opening / closing body 50 is performed even once, the vehicle interior temperature can be brought to the set vehicle interior temperature sufficiently quickly by the automatic air conditioning capability.

Therefore, in this embodiment, only during the first cycle of the main routine in FIG. 4A, that is, when the driving of the air conditioning mechanism 8 is started when the automatic air conditioning switch shown in FIG. 5B is turned on. The subroutine of FIG. 4 (b) is called.

In this subroutine, when the program is started as shown in FIG. 4 (b) (step 202), it is first determined whether or not an opening / closing command for the opening / closing body 50 has been issued before (step 204). If NO in 204, it is determined whether or not the outside air temperature, which is the outside air temperature, is equal to or higher than a predetermined value (step 206).

If YES in step 206, the set vehicle interior temperature is subtracted from the outside air temperature, and it is determined whether the subtracted temperature difference is equal to or greater than a predetermined value (step 208).

In the case of YES in step 208, as shown in FIG. 5 (c), an opening operation command of the opening / closing body 50 is issued (step 21).
0). Then, at the time of the opening operation command of the opening / closing body 50 (FIG. 5 (c)
From time 0) to a predetermined time (reference t _{1 in} FIG. 5 (c)).
) Is determined (step 212).

If YES in step 212, a closing operation command for the opening / closing body 50 is output (step 214).

If NO in step 212, normal automatic air conditioning control for one routine is performed (step 216), and when this routine ends, the process returns to step 212.

On the other hand, YES in step 204 and N in step 206
O, if NO in step 208 and a closing operation command is issued in step 214, return (step 21)
8).

Wherein after a predetermined time t ₁ has elapsed, normal automatic air-conditioning control is performed.

The air-conditioning control according to the first embodiment will be described below with reference to the time charts of FIGS. 5 (a), (b) and (c).

That is, when the time t is 0 and the automatic air-conditioning switch is turned on to start the driving of the air-conditioning mechanism 8, in the subroutine shown in FIG. When it is determined that the temperature difference between the temperature and the set vehicle interior temperature is equal to or more than a certain value, at approximately time t = 0 (strictly, slightly less than time 0 has elapsed due to the processing speed of the program), the window or The opening signal of the sunroof opening is output, and the window or the sunroof opening is opened.

When the window or the sunroof opening is opened, wind (outside air) having a temperature lower than the vehicle interior temperature flows into the vehicle interior, and due to this, the cooling capacity is shown as a solid line M shown in FIG. Becomes In other words, as shown in FIG. 5 (a), the vehicle interior temperature (dashed line N
In the air-conditioning control according to the first embodiment, the vehicle interior temperature can be quickly reduced as indicated by the solid line M to quickly reach the set vehicle interior temperature.

As a result, according to the first embodiment, when the driving of the air-conditioning mechanism 8 is started, the opening (window or sunroof opening) is opened when the temperature outside the vehicle compartment is equal to or higher than the predetermined value. It is possible to prevent a sense of incongruity due to a temperature difference from the above. In addition, since the opening is opened when the temperature difference between the outside temperature of the vehicle and the set temperature inside the vehicle is equal to or more than a certain value, the temperature of the vehicle becomes faster until the temperature in the vehicle decreases to the temperature inside the vehicle, and the responsiveness to the temperature inside the vehicle increases. Can be improved.

Further, it is only necessary to add a board and software for air-conditioning control, and it is not necessary to change the existing air-conditioning mechanism 8, thereby simplifying the configuration and reducing the cost.

FIG. 6 shows a second embodiment of the present invention.
In the second embodiment, portions that perform the same functions as those in the first embodiment will be described with the same reference numerals.

A feature of the second embodiment is that an air volume switch is used instead of the temperature setting switch of the automatic air conditioning control system.
A control unit 38 is provided with a desired set temperature estimating unit 76 for calculating and estimating a desired set vehicle interior temperature based on the value from the air volume switch 72 and the value from the cooling and heating switch 74, while providing the 72 and the cooling / heating switch 74. This desired set temperature estimator
It is configured such that 76 and the outside air temperature sensor 40 are connected to the opening / closing body opening / closing determination section 52.

According to the configuration of the second embodiment, the midpoint of the cooling / heating switch 74 is set to 0, the cooling end is set to -10, the heating end is set to 10,
The value is represented by θ, the minimum air volume of the air volume switch 72 is 1, the maximum air volume is 5, and the value is expressed by k. Then, θr = kθ / 10 + 24 (° C.) is calculated, and the desired set temperature θr is estimated. can do.

Thus, the present invention can be used for an air conditioning control system other than the automatic air conditioning control system, and it is practical because there is no need to change an existing system.

In the second embodiment, if the air-conditioning control system has an outside air temperature sensor, the control system shown in FIG. 6 can be used as a block diagram. It is also possible to use the subroutine shown in FIG. 4 (b) on the assumption that the outside air temperature is a constant value without adding another sensor or other sensors. With such a configuration, the performance is slightly lower than in the case where the sensor is provided, but the configuration can be simplified and the cost can be reduced.

〔The invention's effect〕

As is apparent from the above detailed description, according to the present invention, when the opening / closing operation command of the opening / closing member has not been issued at least once before the start of the driving of the air conditioning mechanism, the temperature outside the vehicle compartment is set to the set vehicle interior temperature. When the temperature exceeds the predetermined value and the temperature difference between the vehicle exterior temperature and the set vehicle interior temperature is a predetermined value or more, the opening / closing body is operated to open the opening, and after a lapse of a predetermined time from the opening operation of the opening / closing body. By providing the control means for operating the opening / closing body to close the opening, when the air conditioning mechanism starts to drive, the opening is opened when the temperature outside the vehicle compartment is equal to or higher than a predetermined value. It is possible to prevent the sense of incongruity due to the temperature difference from the vehicle, and if the opening / closing operation command of the opening / closing body is issued even once, the vehicle interior temperature can be brought to the set vehicle interior temperature sufficiently quickly by the automatic air conditioning capability. Can also be Since the opening is opened when the temperature difference from the room temperature exceeds a certain value, the vehicle room temperature becomes faster until it reaches the set vehicle room temperature, and the responsiveness to the set vehicle room temperature can be improved. It is not necessary to change the existing air-conditioning mechanism, and the configuration can be simplified.

[Brief description of the drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a schematic diagram of an air conditioning control device, FIG. 2 is a block diagram of a main part of a control system of the air conditioning control device, and FIG. FIG. 4 (a) is a flowchart of a main routine for explaining the operation, FIG. 4 (b) is a flowchart of a subroutine for explaining the operation, and FIGS. 5 (a) and (b).
(C) is a time chart of the temperature, the automatic air conditioning switch, and the opening / closing body. FIG. 6 shows a second embodiment of the present invention and is a block diagram of a main part of a control system of an air conditioning control device. FIG. 7 is a block diagram of a control system of a conventional air conditioning control device. In the figure, 2 is an air conditioning control device, 8 is an air conditioning mechanism, 38 is control means, 40 is an outside air temperature sensor, 42 is a vehicle interior temperature sensor,
44 is a temperature setting switch, 48 is an open / close body motor, 50 is an open / close body, 52 is an open / close body open / close determination unit, 54 is an open / close body open / close control unit,
Reference numeral 62 denotes an air conditioning control unit.

Claims (1)

(57) [Claims] An air-conditioning control device for a vehicle, which controls opening and closing of an opening by opening and closing an opening and closing body to adjust a vehicle interior environment state and controls driving of an air-conditioning mechanism. The opening / closing operation command of the switch was previously 1
If the temperature is not output even when the temperature is outside, the outside temperature exceeds the set vehicle interior temperature and becomes a predetermined value or more, and when the temperature difference between the vehicle outside temperature and the set vehicle interior temperature is a certain value or more, the opening is closed. An air conditioning control device for a vehicle, comprising: a control means for operating the opening / closing body to open it and operating the opening / closing body to close the opening after a lapse of a predetermined time from the opening operation of the opening / closing body. .