KR20090035084A - Controller of air conditioning system for automotive vehicles - Google Patents

Abstract

A control device of an air conditioning system for vehicles is provided to keep the indoor are fresh by converting an indoor air mode into an outdoor air mode for set hours. A control device of an air conditioning system for vehicles comprises a maximum cooling mode sensing unit(60) sensing a maximum cooling mode state of the air conditioning system; a maximum cooling mode signal being input from the maximum cooling mode sensing unit; a timer(72) counting the time when an indoor air mode have been continuing from a point of time when the signal is input. A controller(74) converting an indoor and outdoor air conversion door(50) for hours are set up into an outdoor air location mode(Y) by outputting a ventilation mode signal. The controller returns the indoor and outdoor air conversion door to an indoor air location mode(X) if the set up conversion time passes.

Description

CONTROLLER OF AIR CONDITIONING SYSTEM FOR AUTOMOTIVE VEHICLES}

1 is a view showing a general vehicle air conditioning system,

2 is a view showing a control device for a vehicle air conditioning system according to the present invention;

3 is a graph showing the amount of change in the carbon dioxide concentration in the vehicle in the bet mode,

4 is a flowchart showing an example of the operation of the air conditioning system control apparatus according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

1: Controller 3: Auto Mode Switch

10: air conditioning case 12: outside air inlet

14: Entry to My Prayer 16: Internal Passage

20: blower 22: air volume control switch

30: evaporator 40: heater

50: internal and external air conversion door 52: internal and external air conversion switch

60: maximum cooling mode detection means 70: control unit

72: timer 74: control unit

The present invention relates to a control device for a vehicle air conditioning system, and more particularly, a vehicle air conditioning system capable of maintaining a comfortable air at all times by periodically supplying fresh air when the betting mode lasts for a long time. It relates to a control device of.

The vehicle is equipped with an air conditioning system to control the air temperature in the room. The air conditioning system generates warmth in winter to keep the room warm, and cool air in summer.

In such an air conditioning system, in recent years, an automatic control method for automatically adjusting the indoor temperature and humidity of a vehicle according to external conditions has been developed.

As shown in FIG. 1, when the automatic control method air conditioning system (hereinafter, abbreviated as "air conditioning system") operates the auto mode switch 3 of the controller 1, the outside air temperature of the vehicle is controlled. And humidity, bet temperature and humidity of the vehicle, solar radiation, and the like, and controls the blower 20, the evaporator 30, the heater 40, and various doors 50 and 51 according to the detected data. Therefore, the room temperature and humidity of the vehicle are automatically adjusted.

On the other hand, the air conditioning system, when the air conditioner switch 5 is turned on (ON), when the temperature control switch 7 is selected as "Max Cool Mode", the internal and external air switching door (50) Controlled to the mode position (X), it automatically switches to "Betting Mode".

This is because, when the high temperature outdoor air is introduced in the maximum cooling mode, the cooling efficiency of the evaporator 30 drops sharply, and therefore, after introducing the internal temperature lower than the outdoor air, the cooling efficiency is cooled. Is to maximize.

On the other hand, in the air conditioning system of the manual control method, when the mode switch (not shown) of the controller 1 is selected as the "maximum cooling mode", the indoor / outdoor air switching door 50 is the bet mode position X. It will switch to "Bet Mode" automatically when switching to.

However, since the conventional air conditioning system has a structure in which the bet mode state lasts for a long time in the maximum cooling mode, it is pointed out that the indoor air of the vehicle may become cloudy and contaminated.

Particularly, when the bet mode lasts for a long time, there is a disadvantage in that the concentration of carbon dioxide (CO ₂ ) in the room is gradually increased due to the air spouted by the occupants, and the disadvantage is that the driver becomes sleepy or tired easily. There is a serious drawback that there is a risk of a safety accident due to the problem.

The present invention has been made to solve the above-described conventional problems, the object of the vehicle is to ventilate the fresh air periodically to be introduced periodically when the bet mode state for a long time in the maximum cooling mode, To provide a control device for a vehicle air conditioning system to ensure that the indoor air at all times to maintain a comfortable state.

In order to achieve the above object, the control device of the vehicle air conditioning system of the present invention opens the entrance to the bet airway while switching to the bet mode position by operating in the bet mode, and switches to the outside air mode position by operating in the outside air mode. In the air conditioning system for a vehicle that includes an internal and external air switching door for opening the inlet, the internal and external air switching door is open to the internal airway opening while switching to the betting mode position by operating the temperature control switch in the maximum cooling mode, Maximum cooling mode detecting means for detecting whether the air conditioning system is in the maximum cooling mode; A timer for counting the duration of the bet mode from the time point at which the signal is input, when the maximum cooling mode signal is input from the maximum cooling mode detecting means; If the duration of the bet mode counted by the timer is equal to or longer than the set duration, the ventilating mode signal is output to switch the outdoor / external air switching door for the set time to the outside mode position, and when the set time is elapsed, return to the bet mode position. It characterized in that it comprises a control unit to make.

Preferably, the control unit is characterized in that for switching the internal and external air conversion door to the external air mode position for a predetermined time, the opening degree is maintained to maintain 50%.

Best Mode for Carrying Out the Invention Preferred embodiments of a control apparatus for a vehicle air conditioning system according to the present invention will be described in detail with reference to the accompanying drawings (the same components will be described using the same reference numerals).

2 is a view showing a control device for a vehicle air conditioning system according to the present invention. First, before looking at the control apparatus of the vehicle air conditioning system according to the present invention, a brief description of the vehicle air conditioning system with reference to FIG.

The air conditioning system for a vehicle is provided with an air conditioning case 10, and the air conditioning case 10 has an outdoor air inlet 12 for introducing outside air, an internal air inlet 14 for introducing the inside air, and these internal and outdoor air inlets. Internal and external air switching doors 50 for selectively opening any one of (12, 14) are provided.

The internal / external air changeover door 50 rotates to the internal air mode switch X or the external air mode position Y by operating the internal / external air changeover switch 52 in the " betting mode "

The internal / external air switching door 50 opens the airway inlet 14 at the bet mode position X, and opens the airway inlet 12 at the external air mode position Y. Thus, the bet or the outside air can be selectively introduced.

The air conditioning system includes a blower 20. As the blower 20 operates the air volume control switch 22, the blower 20 sucks outside air or inside air and blows the sucked inside and outside air into the inner passage 16 of the air conditioning case 10.

The air conditioning system includes an evaporator 30 and a heater 40 provided in the inner passage 16 of the air conditioning case 10.

The evaporator 30 cools the air moving along the inner passage 16 to generate cold air. The heater 40 generates warmth by heating air moving along the inner passage 16.

On the other hand, such an air conditioning system, when operating the Auto Mode Switch (Auto Mode Switch) 3 of the controller 1, the vehicle through the outside air temperature / humidity detection means, air temperature / humidity detection means, not shown in the figure through the solar sensor The outside air temperature and humidity of the vehicle, the temperature and humidity of the vehicle, the amount of insolation, and the like, and according to the detected data, the evaporator 30, the heater 40, the blower 20 and the various doors 50 and 51 To control. Therefore, the room temperature and humidity of the vehicle are automatically adjusted.

In addition, when the temperature control switch 7 is selected as the "maximum cooling mode", the air conditioning system controls the internal / external air switching door 50 to the betting mode position X to automatically switch to the "betting mode". This is to maximize cooling efficiency by introducing and cooling a low temperature bettor in the maximum cooling mode.

On the other hand, in the air conditioning system of the manual control method, when the mode switch (not shown) of the controller 1 is selected as the "maximum cooling mode", the indoor / outdoor air switching door 50 is the bet mode position X. It will switch to "Bet Mode" automatically when switching to.

Next, the control device of the vehicle air conditioning system according to the present invention will be described in detail with reference to FIG.

First, the control device of the present invention includes a maximum cooling mode detecting means 60 for detecting whether the air conditioning system is currently in the "maximum cooling mode" state.

Maximum cooling mode detection means 60 is composed of a temperature control switch (7).

Temperature control switch 7 is a switch for controlling the blower 20 and the various doors (50, 51) to adjust the temperature of the cold air discharged into the room, and detects that the user lowers the temperature of the cold air to the maximum, Therefore, it is detected whether the air conditioning system is the "maximum cooling mode".

On the other hand, in the case of the manual control type air conditioning system, the maximum cooling mode detecting means 60 is constituted by a mode switch (not shown). The mode switch detects that the user selects "maximum cooling mode" to maximize the temperature of the cold air. Therefore, it is detected whether the air conditioning system is the "maximum cooling mode".

The control device of the present invention includes a control unit 70. The control unit 70 includes a microprocessor and a driving circuit, and has a timer 72 and a control unit 74.

When the "maximum cooling mode signal" is input from the maximum cooling mode detection means 60, the timer 72 counts the "betting mode" duration from the time point at which the signal is input.

The controller 74 determines that the indoor air of the vehicle is cloudy and contaminated when the " set mode " duration counted by the timer 72 is equal to or greater than the preset " set duration time ", and outputs a " ventilation mode signal " According to the output "ventilation mode signal", the indoor / outdoor air conversion door 50 is switched from the internal air mode position X to the external air mode position Y for a predetermined time. When the set switching time has elapsed, it returns to the bet mode position X again.

In particular, by switching the outdoor and outdoor air conversion door 50 to the external air mode position Y during the "setting change time", the outdoor and outdoor air conversion door 50 can open the outdoor air inlet 12 for a predetermined time. By opening the outside air inlet 12 during the setting time, the outside air is controlled to be introduced into the vehicle interior through the outside air inlet 12 during the setting time.

According to such a control unit 70, if the " betting mode " lasts for a predetermined time, the controller switches to the " outer mode " for the set time, and despite the " betting mode " Can be supplied as

Therefore, it is possible to prevent contamination of the indoor air that may occur as the " paging mode " continues, thereby keeping the indoor air of the vehicle comfortable at all times.

On the other hand, the control unit 74, when the " betting mode " lasts for a predetermined time, the internal and external air conversion door 50 is switched to the external air mode position Y for the set time, but the opening degree is maintained to about 50%. Switch.

This is because if the outside air inlet 12 is excessively opened, a large amount of outdoor air at a high temperature may be introduced, and if a large amount of outdoor air is introduced at a high temperature, the cooling efficiency of the evaporator 30 rapidly decreases, thereby effectively cooling the room. This is because it is rapidly reduced.

The "setting duration" built into the controller 74 is preferably set to about 30 minutes. This is because, as shown in the test result of FIG. 3, when four people board the vehicle in the "pitch mode" state, the carbon dioxide concentration in the vehicle rapidly increases after 30 minutes.

Therefore, it is preferable to set the switching time of the "outdoor mode" on the basis of approximately 30 minutes after boarding, in which the carbon dioxide concentration in the vehicle is rapidly increased.

In addition, the " outdoor mode switching time " incorporated in the controller 74 is preferably set to about 4 minutes. This is because, when the outside air is supplied to the interior of the vehicle where the carbon dioxide concentration is rapidly increased for about 4 minutes, the carbon dioxide concentration in the interior of the vehicle falls below the allowable threshold of 1000 ppm.

Next, an operation example of the present invention having such a configuration will be described with reference to FIGS. 2 and 4.

First, when the air conditioner switch 5 is turned ON (S101), it is determined whether the current air conditioning system is the maximum cooling mode (S103).

As a result of the determination, in the maximum cooling mode, the timer 72 of the control unit 70 counts the "betting mode" duration (S107).

The control unit 74 then determines whether the " betting mode " duration counted by the timer 72 is greater than or equal to the preset " set duration time " (S109).

As a result of the determination, if it is equal to or greater than the "setting duration", it is determined that the indoor air of the vehicle is cloudy and contaminated, and the internal / external air switching door 50 is set from the betting mode position X to the outside air mode position Y for a preset time. Switch (S111). At this time, the controller 74 controls the internal and external air switching door 50 to be switched to the external air mode position Y for a predetermined time, while maintaining the opening amount of about 50%.

In this state, since the outdoor air inlet 12 is opened, fresh air is supplied to the interior of the vehicle. Therefore, the air in the cabin is kept clean while being ventilated.

On the other hand, when the set switching time has elapsed, the controller 74 returns the internal / external air switching door 50 to the betting mode position X again.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope of the claims.

As described above, according to the control apparatus of the vehicle air conditioning system according to the present invention, if the bet mode lasts for a set time, the structure is switched to the outside air mode for a set time, despite the bet mode, the fresh air outside There is an effect that can be supplied to the interior of the vehicle.

In addition, despite the bet mode, it is possible to supply external fresh air to the interior of the vehicle, thereby preventing the contamination of the indoor air that may occur as the bet mode continues, thus, the indoor air of the vehicle always There is an effect that can be kept comfortable.

Claims (3)

Opening the airway inlet 14 by switching to the bet mode position (X) as it operates in the bet mode, and opening the outside airway inlet 12 while being switched to the air mode mode (Y) by operating in the outside air mode. In the vehicle air conditioning system including a pre-changing door 50, the internal and external air switching door 50, the operation of the internal air inlet opening 14, while switching to the bet mode position as operating in the maximum cooling mode, Maximum cooling mode detecting means (60) for detecting whether the air conditioning system is in a maximum cooling mode; A timer (72) for counting the duration of the bet mode from the time point at which the signal is input, when the maximum cooling mode signal is input from the maximum cooling mode detecting means (60); If the duration of the bet mode counted by the timer 72 is equal to or longer than the set duration, the ventilation mode signal is output to switch the internal / external air switching door 50 for the time set to the external mode position Y, and the set switching time And a control unit 74 for returning to the bet mode position X when the elapsed time elapses. The method of claim 1, The control unit (74), the control unit for the air conditioning system for a vehicle, characterized in that for switching the internal and external air conversion door (50) to the outside air mode position (Y), the opening amount is maintained to maintain 50%. The method according to claim 1 or 2, The maximum cooling mode detection means 60, Any one of the temperature control switch 7 or the mode switch for operating in the maximum cooling mode, The temperature control switch (7) and the mode switch, the control device of the vehicle air conditioning system, characterized in that the user detects the operation in the maximum cooling mode the air conditioning system is in the maximum cooling mode.

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