JPH04230411A - Air conditioning device for vehicle - Google Patents

Abstract

PURPOSE:To eliminate a feeling of insufficient air volume at the time of swinging an air direction guide vane, in the case of a vehicle air conditioning device constituted so as to swing the air direction guide vane provided in an air blow out port. CONSTITUTION:A blower motor for driving a main blower and a swing motor for driving an air direction guide vane are controlled by an air conditioning control unit provided in an air conditioning device. Blower voltage, applied to the above-mentioned blower, is increasingly corrected so that air volume, generated by the above-mentioned main blower, is increased when the swing motor is operated as compared with when it is not in operation.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle, and more particularly to an air conditioner in which a wind guide vane provided at a center vent outlet is allowed to swing horizontally.

0002

BACKGROUND OF THE INVENTION Some air conditioning systems installed in vehicles have air guide vanes installed at a center vent outlet located in the center of the vehicle interior that swing horizontally. Japanese Patent No. 59516 discloses a configuration in which a drive motor for swinging the wind guide vanes is installed near the center outlet, and the drive motor is automatically activated based on, for example, the temperature inside the vehicle. According to this, there is an advantage that there is no need for a dedicated switch for swinging, and that it is also freed from the complexity of manual operation.

On the other hand, this type of vehicle air conditioning system has
Some devices have a function to automatically control the air volume of the main blower installed in the main duct. That is, when the automatic control mode is selected by operating the auto switch built into the instrument panel of the vehicle, the control unit for air conditioning control will perform a certain correlation with the temperature inside the vehicle, as shown in FIG. 7, for example. The blower voltage corresponding to the actual outside temperature is read out based on a blower voltage map set in advance using a certain outside temperature as a parameter. By outputting this blower voltage to the blower motor, the amount of air generated by the main blower is automatically controlled. In this case, the above blower voltage map is set so that the blower voltage is high in low temperature and high temperature regions in order to perform rapid heating when heating is started in winter and rapid cooling when cooling is started in summer. Generally, the blower voltage is set low in a stable region located between the two, and in a boundary region between the two, the blower voltage is set to decrease as it approaches the stable region.

0004

However, in the prior art described in the above-mentioned publication, in which the wind direction guide blades are automatically swung, if the air volume is automatically controlled, the following problems will occur. That is, in the automatic air volume control mode, the output of the blower motor is reduced in a stable region close to room temperature. Therefore, when this stable region overlaps with the region in which the wind guide vanes are swung, the amount of air hitting the occupants becomes relatively small, and the feeling of cool air especially during summer air conditioning is impaired. This also occurs when the wind guide vanes are manually swung.

[0005] Therefore, the present invention addresses the above-mentioned problems in a vehicle air conditioner in which the wind guide vanes are made to swing. purpose.

[0006]

[Means for Solving the Problems] In other words, a vehicle air conditioner according to the invention of claim 1 of the present application (hereinafter referred to as the first invention) is an air conditioner that supplies air taken from inside or outside the car into a duct. a wind direction guide vane provided at an air outlet at a downstream end in the duct, and a guide vane driving means for swinging the wind direction guide vane, wherein the amount of air sent by the air blowing means is an air volume control means for controlling; and a correction means for correcting the air volume control means so that when the guide vane driving means is activated, the amount of air fed by the air blowing means is increased compared to when the guide vane driving means is not activated. It is characterized by having been established.

[0007] Furthermore, the invention of claim 2 of the present application (hereinafter referred to as the second invention)
The vehicle air conditioner according to the invention includes: a blowing means for feeding air taken in from inside or outside the vehicle into a duct; a wind direction guide vane provided at an air outlet at a downstream end of the duct; and a guide vane drive means for swinging the wind direction guide vane, and an air volume control means for controlling the amount of air sent by the air blowing means, and when the guide vane drive means is activated, compared to when it is not activated. a correction means for correcting the air volume control means so that the amount of air fed by the air blowing means is increased; and a correction means for correcting the air volume control means by the correction means when the amount of air fed from the air blowing means is equal to or greater than a predetermined amount. The present invention is characterized in that it is further provided with a correction prohibiting means for prohibiting an increase correction of the amount.

[0008]

[Operation] According to the first and second inventions, when the wind guide vanes swing, the amount of air fed into the duct is increased compared to when they are not in operation, so the amount of air discharged from the air outlet is increased. This increases the feeling of insufficient airflow given to the occupants.

In particular, according to the second invention, when an amount of air exceeding a predetermined amount is fed into the duct, the increase correction of the amount of air is prohibited, so that excessive noise is not generated in the air blowing system. .

0010

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings.

As shown in FIG. 1, the air conditioner 1 according to this embodiment has a main duct 4 in which an inside air intake port 2 and an outside air intake port 3 are respectively opened. An inside/outside air switching damper 6 is driven by a switching damper motor 5 to switch between inside air intake 2 and outside air intake 3, and is driven by a blower motor 7 to transfer inside or outside air taken in from inside air intake 2 or outside air intake 3 to the main duct. Main blower 8 that blows air into 4
, an evaporator 9 for cooling the air fed by the blower 8, a heater core 10 for heating the air that has passed through the evaporator 9, and an adjustment of the amount of air passing through the heater core 10 that has passed through the evaporator 9. 1st, 2nd
Air mix dampers 11a and 11b, and an air mix damper motor 12 that opens and closes the first and second air mix dampers 11a and 11b in conjunction with each other, are provided, and operate the evaporator 9 and heater core 10 and operate the first and second air mix dampers 11a and 11b. By adjusting the opening degrees of the second air mix dampers 11a and 11b, the air downstream of the heater core 10 is conditioned to a desired temperature.

Note that the inside/outside air switching damper 6 is normally arranged with the inside air intake port 2 closed to introduce outside air.

Further, on the downstream end side of the main duct 4, a front vent duct 13 and a defroster duct 14 are provided.
and a heater duct 15 are connected to the front vent duct 13, and the front vent duct 13 has a center vent outlet 13a that opens at the center of the vehicle interior, lower vent outlets 13b, and 13b that open at both sides of the vehicle interior. Side vent outlet 13c. 13c, and the defroster duct 14 has defroster outlets 14a, 14a and side defroster outlets 14.
b, 14b, and the heater duct 15 has a heater outlet 15a, respectively. The front vent duct 13, the defroster duct 14, and the heater duct 15 have first to third dampers 16a, 16b, 1
6c are respectively installed, and these first to third dampers 1
6a, 16b, and 16c are linked and driven by a mode switching damper motor 17. This allows, as is well known, vent mode, bi-level mode,
The first to third dampers 16a, 16b, 16c are operated via the mode switching damper motor 17 according to each ventilation mode of heat mode, differential & heat mode, and defroster mode.
By selectively opening and closing the air outlet, air is blown toward the inside of the vehicle from the air outlet.

[0014] A swing motor 19 is disposed near the center vent outlet 13a of the front vent duct 13 for swinging the wind direction guide vanes 18...18 provided at the outlet 13a in the horizontal direction. .

On the other hand, the compressor 21 driven by the engine 20 and the evaporator 9 are connected to the cold water circulation passage 2.
2, and the engine 20 and heater core 10 are connected via a cooling water circulation passage 23, so that engine cooling water is circulated between the engine 20 and the heater core 10. There is.

A cooler condenser 24 is connected to the downstream side of the compressor 21 in the cold air circulation passage 22, and a condenser is connected between the cooler condenser 24 and the engine 20 for cooling engine cooling water. A radiator 25 is provided.

Next, a control system for the air conditioner 1 will be explained.

That is, this control system is equipped with an air conditioning control unit 26 as shown in FIG. )
Temperature setting switch 2 that sets the signal from and the target temperature
8, a signal from the auto switch 29 for switching the air conditioning control from manual operation to automatic control, a signal from the inside/outside air changeover switch 30 for changing between inside and outside air, and a mode changeover switch 31 for selecting the ventilation mode. and a signal from the interior temperature sensor 32 that detects the interior temperature of the vehicle.
For example, a signal from an outside temperature sensor 33 that is installed near the capacitor 24 in the engine room and detects the outside temperature, and a signal from an outside temperature sensor 33 that detects the outside temperature and the swing motor 19 are manually turned on and off.
A signal from the swing switch 34 for N-OFF is input, and based on these signals, the blower motor 7, the inside/outside air switching damper motor 5, the mode switching damper motor 17, the air mix damper motor 12, and the swing motor 19 are operated. It is meant to be controlled.

Here, the outline of the air conditioning control by the air conditioning control unit 26 will be explained.
reads various signals detected by the inside temperature sensor 32, outside temperature sensor 33, etc., and serves as a reference for controlling the temperature to the set temperature set by the temperature setting switch 28 based on these signals. Compute the total signal. Then, by driving the air mix damper motor 12 based on this comprehensive signal, the opening degrees of the first and second air mix dampers 11a and 11b are controlled, and the rotational speed of the blower motor 7 is controlled to a predetermined level. Get the air volume. Furthermore, by controlling the operation of the compressor 21, the amount of cooling by the evaporator 9 is adjusted. As a result, the temperature on the downstream side of the heater core 10 is controlled around the set temperature.

Next, the blower voltage setting process, which is a characteristic part of the present invention, will be explained in accordance with the flowchart shown in FIG.

That is, the air conditioning control unit 26 first determines whether the air conditioning control is in the automatic control mode in step S1, and if the determination is YES, the process proceeds to step S2 to calculate the basic blower voltage VA in the automatic control mode. In addition,
When calculating the basic blower voltage VA in this case,
The map shown in FIG. 7 is used, and the outside temperature indicated by the signal from the outside temperature sensor 33 is in a low temperature range (
For example, when belonging to a high temperature range (-20℃) or relatively higher than room temperature, a high value of basic blower voltage VA is read out, and in a stable area around room temperature, which is close to the set temperature, a smaller value of basic blower voltage VA is read out. The voltage VA will be read out. In the boundary area between this stable area and the high temperature area, a basic blower voltage VA that decreases as the outside temperature decreases is read out, and also in the boundary area between the stable area and the low temperature area. In this case, the basic blower voltage VA that decreases as the outside temperature increases is read out.

Next, the air conditioning control unit 26 determines whether the swing motor 19 is operating by manual operation of the swing switch 34 or by automatic control when a predetermined condition is met, and the determination is NO. In some cases, the process proceeds to step S4 to set the basic blower voltage V.
Let A be the final blower voltage V. By outputting a drive signal corresponding to the final blower voltage V to the blower motor 7, an air flow with an air volume corresponding to the final blower voltage V is generated in the main duct 4, and the air flow is transferred to the center vent. The air is discharged into the vehicle interior through the air outlet 13a and the like.

On the other hand, when the air conditioning control unit 26 determines YES in the above step S3, it moves to step S5 and calculates a value corresponding to the actual basic blower voltage VA from a correction voltage map set in advance using the basic blower voltage VA as a parameter. The corrected voltage δV is read out.

As shown in the map of FIG. 4, for example, the correction voltage δV decreases linearly as the basic blower voltage VA increases, and the basic blower voltage VA reaches a value equal to or higher than the predetermined voltage V1. When shown, it is set to converge to zero.

Then, the air conditioning control unit 26 proceeds to step S6 and adds a correction voltage δV to the basic blower voltage VA.
The final blower voltage V is the sum of the values.

[0026] As a result, the amount of air obtained by the blower motor 7 is increased compared to when the wind direction guide vanes 18...18 are not swinging, and the amount of air blown toward the occupant is accordingly increased. It turns out.

Note that when the basic blower voltage VA becomes higher than the predetermined voltage V1, the value of the correction voltage δV becomes 0.
As a result, the blower motor 7 generates the same amount of air as when the wind direction guide vanes 18...18 are not swinging, and as a result, an appropriate amount of air is blown toward the passenger, and the noise level does not increase significantly.

As shown in FIG. 5, the map for obtaining the correction voltage δV is such that the correction voltage δV is kept constant until the basic blower voltage VA exceeds the second predetermined voltage V2 (V2<V1). At the same time, the voltage may be suddenly decreased when the voltage exceeds the voltage V1. Even in this case,
When the basic blower voltage VA reaches a predetermined voltage V1, the correction voltage δV is converged to zero.

Furthermore, as a map for obtaining the correction voltage δV, as shown in FIG.
The voltage may be set to a predetermined amount until the voltage reaches the predetermined voltage V1.

Note that a fixed amount of correction voltage δV may be always obtained regardless of the value of the basic blower voltage VA.

[0031]

[Effects of the Invention] As described above, according to the present invention, when the wind guide vanes swing, the amount of air fed into the duct is increased compared to when they are not in operation, so that the air is discharged from the air outlet. The amount of air increases, which eliminates the feeling of insufficient air volume for the occupants.

In particular, according to the second invention, when an amount of air exceeding a predetermined amount is fed into the duct, the increase correction of the amount of air is prohibited, so that excessive noise is not generated in the ventilation system. There is an advantage.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of an air conditioner.

FIG. 2 is a control system diagram of an air conditioner.

FIG. 3 is a flowchart showing blower voltage setting processing.

FIG. 4 is a graph showing an example of correction voltage characteristics used in blower voltage setting processing.

FIG. 5 is a graph showing another example of correction voltage characteristics used in correction voltage setting processing.

FIG. 6 is a graph showing yet another example of the correction voltage characteristics used in the correction voltage setting process.

FIG. 7 is a control characteristic diagram of the blower voltage in the automatic control mode of the vehicle air conditioning system.

[Explanation of symbols]

4 Main blower 13a Center vent outlet 18 Wind direction guide vane 19 Swing motor 26 Air conditioning control unit

Claims (2)

[Claims] [Claim 1] A blowing means for feeding air taken in from inside or outside the vehicle into a duct, a wind guide vane provided at an air outlet at the downstream end of the duct, and a swinging wind guide vane. A vehicle air conditioner having a guide vane driving means, an air volume control means for controlling the amount of air sent by the air blowing means, and an air flow rate control means for controlling the amount of air sent by the air blowing means, and when the guide vane driving means is activated, compared to when the guide vane driving means is not activated. An air conditioner for a vehicle, comprising: a correction means for correcting the air volume control means so that the amount of air to be fed is increased. [Claim 2] A blowing means for feeding air taken in from inside or outside the vehicle into the duct, a wind guide vane provided at an air outlet at the downstream end of the duct, and a swinging wind guide vane. A vehicle air conditioner having a guide vane driving means, an air volume control means for controlling the amount of air sent by the air blowing means, and an air flow rate control means for controlling the amount of air sent by the air blowing means, and when the guide vane driving means is activated, compared to when the guide vane driving means is not activated. a correction means for correcting the air volume control means so as to increase the amount of air fed; and a correction means for increasing the air amount by the correction means when the amount of air fed from the air blowing means is equal to or greater than a predetermined amount. A vehicle air conditioner characterized in that it is provided with correction prohibition means for prohibiting correction.