KR101250273B1 - Control method of air-conditioner under mode change - Google Patents

Abstract

The present invention relates to a control method that can reduce the driving noise of the blower when switching from the outdoor mode to the bet mode as a harmful gas is detected at a certain concentration or more under the automatic air conditioning control mode of the air conditioner. Checking whether the automatic air conditioning mode is selected while the air conditioner is set and initializing the air conditioner; and if the automatic air conditioning mode is selected as the result of the check, executing the automatic air conditioning mode according to the harmful detection signal; Checking whether the air conditioner is switched from the outdoor air mode to the bet mode through the execution of the automatic air conditioning control mode, and performing the correction control for noise attenuation according to the operation of the blower when the external air mode is switched to the bet mode. And the automatic air conditioning adjustment mode during the correction control. Checking whether the operation is switched from the bet mode to the outside mode; and when the result of the check indicates that the control is released from the bet mode to the outside mode, the control for canceling the noise is canceled and whether the mode is switched from the outside mode to the bet mode. Characterized in that it comprises a step back.

Car, Air Conditioning Unit, Mode Switching, Noise Reduction

Description

CONTROL METHOD OF AIR-CONDITIONER UNDER MODE CHANGE}

1 is a schematic view showing an air conditioner for implementing a control method according to the present invention.

Figure 2 is a front view showing an operation unit installed on the instrument panel for implementing the control method according to the present invention.

3 is a flow chart showing a control method according to the present invention;

DESCRIPTION OF THE REFERENCE NUMERALS

100: control unit 200: control panel

210: air conditioner operation button 220: wind direction selection button

230: outside temperature display button 240: automatic air conditioning adjustment button

250: automatic air conditioning adjustment stop button 260: air volume control button

270: Windshield defrost button 280: Rear windshield heating button

290: temperature setting button 300: interior / exterior selection button

310: harmful gas auto shut off button 320: display panel

410: In-vehicle temperature sensor 420: In-vehicle temperature sensor

430: solar radiation sensor 440: humidity sensor

450: evaporator temperature sensor 460: coolant temperature sensor

470: hazardous gas detection sensor 500: air conditioning case

510: defrost vent 520: face vent

530: foot vent 600: blower

610: air intake 620: air intake

640: blower fan 650: blower motor

700: evaporator 710: heater core

720: compressor 730: condenser

740: receiver drier 750: expansion valve

800: engine

The present invention relates to a control method of an air conditioner, and more particularly, to a control method capable of attenuating driving noise of a blower when the air conditioner switches from an outdoor mode to a bet mode.

In general, automobiles are equipped with a predetermined air conditioner as a facility for a comfortable environment in the room. Such a car air conditioner performs a heating function to increase the room temperature by operating a predetermined heater in winter, and a cooling function of lowering the room temperature by operating a predetermined air conditioner in the summer, thereby making passengers including the driver feel comfortable. I'm getting it.

Looking specifically at the configuration of the car air conditioner, the values detected from the indoor / outdoor temperature sensor, insolation sensor, humidity sensor, evaporator temperature sensor, coolant temperature sensor, harmful gas detection sensor installed in each position is input to the control unit The control unit calculates this value and outputs and controls the driving voltages of the blower's internal / external air switching door, the blower motor, the temperature control door, and the doors of the vents, thereby controlling the inflow / outflow, the air volume, the temperature, and the wind direction. To automatically control the air conditioning mode.

For example, indoor temperature information detected by an indoor temperature sensor, outdoor temperature information detected by an outdoor temperature sensor, solar radiation information detected by an insolation sensor, vehicle humidity information detected by a humidity sensor, and an evaporator temperature sensor Analog signals such as evaporator temperature information, coolant temperature information detected by the coolant temperature sensor, and harmful gas concentration detected by the harmful gas detection sensor are converted into digital signals by a predetermined A / D converter and input to the control unit.

Then, the control unit feedback-controls the air volume control voltage, the internal / external air position voltage, the temperature control position voltage, and the air volume position voltage according to the input signals to blower motor, internal / external air switching door, temperature regulating door, and vent. The air conditioning adjustment mode is automatically performed in accordance with the vehicle indoor / outdoor environment by controlling the voltage output to their drive units so that the doors of the children operate properly.

However, the air conditioner has a problem of switching from the outside air mode to the bet mode without considering any air flow noise generated in the blower when the outside harmful gas is detected above a certain concentration under the automatic air conditioning control mode.

Accordingly, the present invention is to solve the above problems, the air flow noise generated in the blower when switching from the outside mode to the bet mode as the harmful gas is detected at a certain concentration under the automatic air conditioning control mode of the air conditioner. Its purpose is to provide a control method that can be attenuated.

In order to achieve the above object, the control method when switching from the outdoor mode to the bet mode of the vehicle air conditioner according to the present invention is selected by the automatic air conditioner adjustment mode in a state where the vehicle is started and the air conditioner is initialized. Checking whether it is done; If the automatic air conditioning control mode is selected, executing the automatic air conditioning control mode according to the harmful detection signal; Confirming whether to switch from an outdoor air mode to a bet mode by executing the automatic air conditioning control mode; Performing the correction control for noise attenuation according to the operation of the blower at the same time when the switching from the air mode to the bet mode as a result of the checking; Checking whether the automatic air conditioning adjustment mode is switched from the bet mode to the outside air mode while performing the correction control; As a result of the check, when the change from the bet mode to the outside air mode, the step of releasing the correction control for noise attenuation and returning to the step of confirming whether to switch to the bet mode from the outside air mode is made, the correction for the noise attenuation The performing of the control may include performing discharge temperature correction control for correcting the discharge temperature so as to minimize the amount of change in the indoor temperature caused by the change of the internal and external air.

Here, in the performing of the correction control for noise reduction, the air volume correction control to adjust the air volume may be performed by reducing the blower rotation speed in the bet mode by a set ratio less than the blower rotation speed in the outside mode. It is preferable to perform the air volume compensation delay control to reduce the rotational speed at a constant rate from the blower rotational speed in the outdoor mode to switch to the rotational speed in the bet mode.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a schematic diagram showing a vehicle air conditioner for implementing the control method according to the present invention, Figure 2 is a front view showing an operation unit installed in the instrument panel for implementing the control method according to the present invention. As shown, the vehicle air conditioner is an in-vehicle temperature sensor 410, the vehicle temperature sensor 420, the solar radiation sensor 430, the humidity sensor 440, the evaporator temperature sensor 450, which is installed inside / outside the vehicle, Internal / external air information is input to the control unit 100 from the coolant temperature sensor 460 and the noxious gas detection sensor 470 to output a predetermined control signal to automatically perform the air conditioning function.

In detail, the vehicle air conditioner includes a defrost vent 510, a face vent 520, and a foot vent 530 whose openings are adjusted by doors 510 d, 520 d, and 530 d, respectively. An air intake case 500, an inlet inlet 610 connected to an inlet 550 of the air conditioner 500, and an opening degree of which is controlled by a switching door 630, is installed thereon. And a blower 600 that blows the inside or outside air into the air conditioner case 500 by the blower fan 640 that is rotated by the blower motor 650, and upstream of the internal flow path of the air conditioner case 500. Evaporator 700 is installed on the side, and the heater core 710 is installed on the downstream side of the inner flow path of the air conditioning case 500, the heater core 710 is adjusted by the temperature control door 540 is installed in front do.

The evaporator 700 is connected to a compressor 720 through a duct and the compressor 720 is connected to a condenser 730. The condenser 730 is connected to a receiver dryer 740, (740) is connected to an expansion valve (750) connected to the evaporator (700) to constitute a cooling cycle. Here, the heater core 710 is connected to the engine 800 is configured a heating cycle.

Therefore, in the cooling mode, the vents 510 opened while the inside air or the outside air blown by the blower 600 exchanges with the refrigerant flowing through the evaporator 700 while passing through the evaporator 700 and is changed to cold. Cooling of the vehicle interior is performed by discharging the vehicle interior through 520 and 530.

In addition, in the heating mode, the vented air is exchanged with the heating water flowing inside the heater core 710 while passing through the evaporator 700 and the heater core 710, and the vents 510 opened while being changed to warmth. By discharging to the interior of the vehicle through 520 and 530, heating of the interior of the vehicle is performed.

The control unit 100 includes a change door 630, a blower motor 650, a temperature control door 540, and respective doors 510d and 520d of various vents 510, 520 and 530 ( By controlling the output voltage driving 530d), the air conditioning moat pattern for internal / external air inflow, air volume, temperature, and wind direction is controlled.

The operation unit 200 installed in the instrument panel includes an air conditioner operation button 210, a wind direction selection button 220, an outside temperature display button 230, an automatic air conditioning control button 240, and an automatic air conditioning control stop button 250. , Air volume control button 260, windshield defrosting button 270, rear windshield heating button 280, temperature setting button 290, internal / external air selection button 300, harmful gas automatic blocking button 310, And a display panel 320 is installed.

The air conditioner operation button 210 is used to start a predetermined air conditioner during the on operation and to stop the air conditioner operation during the off operation. The wind direction selection button 220 is used to adjust the opening degree of each of the vents 510, 520, 530 in response to the selected air conditioning mode by selecting various air conditioning modes such as defrost mode, foot mode, and vent mode. . The outside air temperature display button 230 is used to display the temperature of the outside air on the display panel 320.

The automatic air conditioning control button 240 is used by the control unit 100 to automatically perform the air conditioning adjusting mode. The automatic air conditioning control stop button 250 is used to stop the automatic control of the automatic air conditioning control mode. The air volume control button 260 is used to adjust the blowing amount by adjusting the rotational speed of the blower motor 650. The windshield defrost button 270 is used to operate the defroster door 510d to open the defrost vent 510 and to remove the windshield from the windshield by the indoor discharge air.

The rear window heating wire button 280 is used to remove heat from the rear window by heating the heat wire installed in the rear window. The temperature setting button 290 is used to control the temperature of the indoor discharge air by operating the temperature control door 540 to regulate the opening of the air passage in the direction of the heater core 710. The internal / external air selection button 300 is used to blow air in the internal circulation mode or the external air mode by operating the switching door 630 to open the internal air suction port 610 or the external air suction port 620. The harmful gas automatic shutoff button 310 operates the switching door 630 to automatically perform a bet circulation mode when it is recognized through the harmful gas detection sensor 470 installed on the front of the vehicle to the outside harmful air flow into the room. It is used to The display panel 320 is used to display the current air conditioning mode pattern state.

3 is a flowchart illustrating a control method according to the present invention. As shown, when the air conditioner operation button 210 is pressed while the vehicle is started, the operating state of the air conditioner is initialized (S110) (S120).

Subsequently, when the automatic air conditioning control button 240 is pressed to select the automatic air conditioning control mode, the automatic air conditioning control mode is executed according to the concentration of the noxious gas detected by the harmful gas detection sensor 470 so as to bet or air mode. Automatically select (S130) (S140). That is, the bet mode is automatically selected when a harmful gas of a predetermined concentration or more is detected through the noxious gas detection sensor 470, and the outside air mode is automatically selected when a harmful gas of a certain concentration or less is detected.

Subsequently, as the vehicle stops while the road stops, it is checked whether the gas is switched from the outdoor mode to the bet mode, such as when a harmful gas of a predetermined concentration or more is detected through the harmful gas detection sensor 470 (S150). As a result of the check, when the air is switched from the air mode to the bet mode, the control unit 100 simultaneously controls the air volume control voltage applied to the blower motor 650 to attenuate the noise generated by driving the blower 600. A predetermined correction control is performed (S160). In other words, it reduces the air flow noise that may be generated when the air conditioner switches from the outdoor mode to the bet mode.

Here, the correction control for reducing the noise is specifically, the control unit 100, the blower rotation speed in the bet mode is less than the blower rotation speed in the outside mode (for example, 90% of the rotation speed in the outside mode) In order to control the blower motor 650 to reduce the noise of the blower 600, the air volume correction control for adjusting the air volume may be performed.

At this time, the air volume correction control for adjusting the air volume is more preferably to perform the air volume compensation delay control to reduce the rotation speed in a constant ratio from the rotation speed of the blower in the air mode to switch to the rotation speed in the bet mode.

In addition, the correction control for attenuating the noise may perform a discharge temperature correction control for correcting the discharge temperature to minimize the change in the room temperature according to the internal and external air change, and specifically, the discharge temperature correction control is an indoor temperature set for each vehicle. It is preferable to correct the discharge temperature based on the correction amount according to the control characteristic.

Finally, when the automatic air conditioning adjustment mode is switched from the bet mode to the outside air mode during the execution of the correction control, the control unit 100 cancels the correction control for noise attenuation and also the bet mode in the outside air mode. Returning to the step of checking whether the conversion to (S180).

On the other hand, although the control method for switching from the outside mode to the bet mode of the vehicle air conditioner according to the present invention has been described according to a limited embodiment, the scope of the present invention is not limited to a specific embodiment, in relation to the present invention Various alternatives, modifications, and changes can be made within the scope apparent to those skilled in the art.

According to the present invention, it is possible to implement a more comfortable cabin environment by attenuating the driving noise generated in the blower when the vehicle air conditioner is switched from the outdoor mode to the bet mode.

Claims (4)

Checking whether the automatic air conditioning control mode is selected in a state where the vehicle is started and the air conditioner is initialized; If the automatic air conditioning control mode is selected, executing the automatic air conditioning control mode according to the harmful detection signal; Confirming whether to switch from an outdoor air mode to a bet mode by executing the automatic air conditioning control mode; Performing the correction control for noise attenuation according to the operation of the blower at the same time when the switching from the air mode to the bet mode as a result of the checking; Checking whether the automatic air conditioning adjustment mode is switched from the bet mode to the outside air mode while performing the correction control; As a result of the check, when switching from the bet mode to the outside air mode, the step of releasing the correction control for noise reduction and checking whether the transition from the outside mode to the bet mode is made, The performing of the correction control for noise reduction may include performing a discharge temperature correction control for correcting a discharge temperature so as to minimize a change in the indoor temperature according to the change of internal and external air. Control method at the time of switching. The method of claim 1, Carrying out the correction control for the noise attenuation is characterized in that the air volume correction control to adjust the air volume by adjusting the blower speed in the bet mode to a lesser than the blower rotation speed in the air mode, characterized in that for performing the air volume correction control Control method when switching from the air mode of the device to the bet mode. The method of claim 2, The air volume correction control for adjusting the air volume is a vehicle air conditioner, characterized in that for performing the air volume compensation delay control to reduce the number of revolutions at a constant rate from the fan rotation speed in the air mode to switch to the rotation speed in the bet mode Control method when switching from the outside mode to bet mode. delete

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