KR100194208B1 - Automotive compressor automatic control device and method - Google Patents

Abstract

The present invention relates to an apparatus and method for automatically controlling a compressor of an automobile, comprising: a mode switching switch, an indoor temperature setting switch, a blower speed setting switch, and an air blowing direction setting for automatically / manually selecting control of a vehicle indoor temperature Switch control unit with switches and vehicle indoor temperature control switches, display indicating the set temperature, indoor temperature sensor, outdoor temperature sensor, solar radiation sensor, evaporator passing temperature sensor, engine coolant temperature sensor, air mixing door position sensor, EMS ECU, Throttle Valve Opening Detection Sensor, Crank Angle Sensor, Engine rpm Sensor, When the Mode Switching Switch is in Automatic Mode with the Car Ignition Key On, the Switch Control Unit Compressor control signal by operating OFF switch, ECO switch, DEF switch There is provided a microcomputer for generating a compressor, an EMS ECU for generating a compressor on / off signal in accordance with the compressor control signal generated by the microcomputer and a compressor actuator for turning on / off the compressor in accordance with the compressor on / off signal provided from the EMS ECU It is characterized by.

Description

Automotive compressor automatic control device and method

The present invention relates to a system for adjusting the room temperature of a vehicle, and more particularly, to an apparatus and a method for automatically controlling a compressor of a vehicle.

In general, since the vehicle temperature is greatly affected by the external environment, the vehicle is equipped with an air conditioning system in which a heater and a cooler operated by the rider are integrated in order to make the rider comfortable.

1 is a schematic diagram of a general air conditioning system, an air conditioning duct, a first door for selectively introducing air of either internal air or external air into the air conditioning duct, and suctioning air through the first door A blower, an evaporator for cooling the air introduced by the blower, a heater core for warming the air introduced through the blower with warm air, and cold air easily passing through the heater core when the air conditioner is operated. In the heater operation, a second door is formed to form a cold air or a hot passage so that the inflow air passes through the heater core, and a third door to eject the air introduced through the evaporator or the heater core in a desired direction. And the air flowing through the third door flows toward the front windshield or the bottom of the vehicle body. A switch selected such that a fourth door to operate the first to fourth doors and the first to fourth doors operate in response to a corresponding control signal, and the first to fourth doors are operated according to a passenger's operation. A microcomputer generates a control signal in response to the signal and controls the entire system, and a switch operation unit for providing a switch signal to the microcomputer.

Here, the evaporator forms a refrigeration cycle together with a compressor, a condenser, and the like, which are not shown, and the heater core allows heat to be dissipated by the coolant heated through the engine.

In addition, the switch operation unit is provided with an air conditioner operation switch, a heater operation switch, an air blowing position adjusting switch, an air blowing intensity adjusting switch, an air inflow selection switch and the like.

Here, the air blowing position adjusting switch operates the third and fourth doors to adjust the air blowing direction, and the air blowing intensity adjusting switch changes the rotational speed of the blower motor according to the switch operation. In addition, the air inlet selection switch circulates the internal air or selects that the external air is introduced.

When the driver operates the air conditioner operation switch while the ignition switch is turned on as described above, the microcomputer receives the switch signal from the air conditioner operation switch to drive the blower, and the compressor to the condenser. A refrigeration cycle is carried out to the evaporator to the compressor, and the heater core side is blocked by the second door so that air introduced through the blower does not pass through the heater core.

Therefore, the inside air or the outside air is introduced into the air conditioning duct by the driving of the blower, the inflowed air is cooled through the evaporator to perform the freezing cycle, and flows through the cooling passage by the second door. At this time, the cooled air passing through the second door flows according to the state of the third door. If the state of the third door is blocking the bottom of the vehicle body as shown in the figure, the driver's front direction or the windshield of the vehicle As the fourth door blocks the driver's front direction, the cooled air is blown toward the windshield.

In addition, the operation of the heater is similar to the operation of the air conditioner described above, and when the heater operation switch is operated, the blower is driven to allow the coolant to flow through the engine to the heater core, and the second door is operated in the opposite direction to the operation of the air conditioner. This allows the inlet air to warm through the heater core. The subsequent operation determines the air blowing direction in accordance with the positions of the third and fourth doors as in the air conditioner.

In this way, the air conditioning system operates according to the driver's operation so that the cold compartment is adapted to the driver.

However, in the conventional vehicle as described above, since the driver manually manipulates the vehicle indoor temperature, there is an inconvenience caused by manual operation and causes a driving obstacle due to manual operation, resulting in a risk of an accident.

It is an object of the present invention to solve the problem that the driver has to manually operate the air conditioning system in order to adjust the vehicle indoor temperature as described above in order to solve the problem that there is a risk of accidents to automatically adjust the indoor temperature through a simple operation The present invention provides an apparatus and method for automatically controlling a compressor of a compressor.

The vehicle compressor automatic control apparatus of the present invention for achieving the above object is a mode switching switch for selecting whether to automatically control the vehicle indoor temperature or manually controlled, the temperature setting switch for setting the indoor temperature of the vehicle Switch operation unit having a blower speed setting switch for setting the speed of the blower, an air blowing direction setting switch for setting the air blowing direction, and switches for controlling the vehicle indoor temperature, and an indoor temperature setting switch of the switch operating unit Display to display the set indoor temperature, indoor temperature detection sensor for detecting the indoor temperature of the vehicle, outdoor temperature detection sensor for detecting the outdoor temperature of the vehicle, solar radiation detection sensor for detecting the amount of solar radiation, which is introduced into the vehicle Passing through the evaporator to detect the temperature of cold air When the mode changeover switch is in the automatic mode while the temperature sensor, the coolant temperature detection sensor, and the car ignition key are turned on, it is according to the result of comparing the detected temperature and the set temperature, respectively, or the OFF switch, the ECO switch, the DEF switch of the switch control unit. A microcomputer that generates a compressor control signal according to an operation of the microcomputer; Compressor actuator to turn on / off is characterized in that it is provided.

The vehicle compressor automatic control method of the present invention for achieving the above object is a mode switching switch for selecting whether to control the vehicle room temperature automatically or manually, the temperature setting switch for setting the room temperature of the vehicle Switch operation unit having a blower speed setting switch for setting the speed of the blower, an air blowing direction setting switch for setting the air blowing direction, and switches for controlling the vehicle indoor temperature, and an indoor temperature setting switch of the switch operating unit Display to display the set indoor temperature, indoor temperature detection sensor for detecting the indoor temperature of the vehicle, outdoor temperature detection sensor for detecting the outdoor temperature of the vehicle, solar radiation detection sensor for detecting the amount of solar radiation, which is introduced into the vehicle Passing through the evaporator to detect the temperature of cold air The temperature sensor, coolant temperature detection sensor, throttle valve opening detection sensor, crank angle sensor, engine rpm sensor, and the vehicle ignition key are on, and the mode switching switch is in the automatic mode. The microcomputer generates a compressor control signal according to the operation of the OFF switch, the ECO switch and the DEF switch of the switch operation unit, an EMS ECU which generates a compressor on / off signal according to the compressor control signal generated from the microcomputer, and the EMS A method for automatically controlling a compressor of a vehicle equipped with a compressor actuator for turning on / off a compressor according to a compressor on / off signal provided from an ECU, wherein the current mode of the switch control panel mode switching switch is determined when the ignition key of the vehicle is on. Determining the current mode switch; If it is determined in the automatic mode in the step of determining whether the temperature set by the driver is less than the room temperature of the vehicle, the step of determining whether the driver set temperature is less than the room temperature, the compressor is turned off when the driver set temperature is greater than the room temperature Determining whether the set temperature is less than or equal to the outside temperature of the vehicle, and determining whether the set temperature is less than or equal to the outside temperature when the set temperature is greater than the room temperature. Determining whether the temperature is less than or equal to a preset external temperature; determining whether the detected external temperature is less than or equal to a preset external temperature; and turning off the compressor if the detected external temperature is less than or equal to a preset external temperature. Determining whether the evaporator pass temperature is below a preset evaporator pass temperature, In the step of determining whether the evaporator passage temperature is below the preset evaporator passage temperature, if the evaporator passage temperature is below the preset evaporator passage temperature, the compressor is turned off. And turning on the compressor when the coolant temperature is less than the preset coolant temperature at a step of determining whether the coolant temperature is greater than or equal to the preset coolant temperature.

1 is a schematic diagram of a conventional air conditioning system.

2 is a block diagram of a vehicle automatic temperature control circuit according to the present invention.

3 is a view showing a basic configuration of a vehicle automatic temperature control circuit according to the present invention.

4 is an operation flowchart for explaining the operation of the microcomputer shown in FIG.

5 is a flowchart illustrating a method of controlling a compressor by a microcomputer according to the present invention.

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

2 is a block diagram of the automotive automatic temperature control circuit of the present invention, the indoor temperature sensor 13, outdoor temperature sensor 15, solar radiation sensor 14, temperature setter 33, input information correction means 300 , Air mixing door opening degree calculating means 100, evaporator passing air temperature sensor 11, air mixing door position sensor 43, blower speed setter 32, control signal and exhaust air temperature calculating means 200, air Mixing door actuator 44, inlet selection means 40, outlet selection means 45, blower variable control means 41, air mixing door 3, suction door 21, mode doors 22, It consists of a blower 1, an operation panel 30, a transmission and reception circuit 80, and a microcomputer communication port 90.

The room temperature sensor 13 detects a room temperature of the vehicle for maintaining the room temperature of the vehicle at a temperature set by the driver. The outdoor temperature sensor 15 detects a temperature outside the vehicle. The solar radiation sensor 14 detects the solar radiation amount. The temperature setter 33 sets the temperature desired by the driver. The input information correcting means 300 corrects the detected outdoor temperature and solar radiation information. The air mixing door opening degree calculation unit 100 calculates the opening degree θ _A of the air mixing door that mixes cold and warm air by inputting indoor temperature, outdoor temperature insolation amount, and driver setting temperature information. The evaporator passing air temperature sensor 11 detects the temperature of the air passing through the evaporator. The air mixing door position sensor 43 detects the position of the air mixing door. The blower speed setter 32 sets the speed of the blower by the user. The control signal and the exhaust air temperature calculating means 200 input the evaporator passing temperature (T _EVA ) and the position information of the air mixing door to calculate the control signal (T _C ) and the exhaust air temperature (T _F ) by the following equation (1). And (2).

T _C = (Kcar * Tcar) + (Kamb * Tamb) + (Ksun * Tsun)-(Kset * Tset) ...... (1)

T _F = Teva + (α * θ _A ) ...... (2)

In Equation (1), Kcar is the vehicle interior temperature constant, Tcar is the vehicle interior temperature, Kamb is the vehicle interior temperature constant, Tamb is the vehicle exterior temperature, Ksun is the solar radiation constant, Tsun is the solar radiation constant, Kset is the driver set temperature constant, Tset Denotes the operator set temperature, Teva denotes the temperature of the air passing through the evaporator, respectively, and α in the formula (2) denotes the opening angle constant of the air mixing door.

The air mixing door actuator 44 controls the air mixing door 3 by inputting the air mixing door opening angle and a control signal and a signal from the exhaust air temperature calculating means. The inlet selection means 40 controls the intake door 21 by inputting a control signal and a signal from the exhaust air temperature calculating means 200. The outlet selection means 45 controls the mode doors 22 by inputting a control signal and a signal from the exhaust air temperature calculating means 200. The blower speed variable control means 41 controls the blower 1 by inputting a control signal and a signal from the exhaust air temperature calculating means 200. The transmission and reception circuit 80 receives input information of the switches of the operation panel 30 to communicate with the communication port of the microcomputer 50.

3 shows a basic configuration of the automotive automatic temperature control circuit of the present invention, which includes a blower motor 1, an evaporator 2, an air mixing door 3, a compressor 4, a heater core 5, and a coolant 6 ), Evaporator pass temperature sensor 11, coolant temperature sensor 12, room temperature sensor 13, insolation sensor 14, outdoor temperature sensor 15, suction door 21, mode doors 22a, 22b , 22c), operation panel 30, operation buttons 31a-31j, blower speed adjusting means 32, temperature setting means 33, temperature display means 34, various actuators 40, 41, 42 , 43, 44, 45, a microcomputer 50, and a transmission and reception circuit 80.

FIG. 4 is a flowchart illustrating a method for controlling a vehicle automatic temperature by the microcomputer of the present invention. When the microcomputer 50 starts to operate, the operation panel 30 and various sensors 11-15 and 43 are described. Accept the sensed information (step 400). Since the output values of the sensor 15 and the solar radiation sensor 14 that detect the outdoor temperature pass rapidly through the tunnel of the vehicle, the output values of the sensor 15 and the solar radiation sensor 14 change rapidly. Correction (step 410). The control signal T _C is calculated using Equation (1) (step 420). The opening angle of the air intake door 3 is calculated (operation 430). Using the equation (2) to calculate the exhaust air temperature (T _F ) (step 440). Then, the blower motor 1 is controlled (step 450). The mode doors 22a, 22b, and 22c are controlled (step 460). The suction door 21 is controlled (step 470). By performing such an operation, the room temperature of the vehicle can be automatically controlled.

FIG. 5 is an operation flowchart illustrating a method in which the microcomputer of the present invention controls the compressor, wherein the ignition key of the vehicle is turned on, and among the switches of the operation panel 30, the AUTO switch 31h, the OFF switch 31j, and the ECO. When the switch 31i or the DEF switch 31e is turned on, a command is sent to the EMS ECU 42b to operate the compressor 4, and the EMS ECU 42b operates the compressor 4 to operate. The explanation is as follows. Check whether the AUTO switch 31h of the switch of the operation panel 30 is turned on (step 730). If the AUTO switch 31h is turned on, it is determined whether the temperature Tset set by the driver is less than or equal to the room temperature Tcar of the vehicle (step 732). If the step 732 is satisfied, it is determined whether the set temperature Tset is less than or equal to the outside temperature Tamb of the vehicle (step 734). If it satisfies step 734, it is determined whether the outside temperature Tamb of the vehicle is less than or equal to a preset temperature (about −1 ° C.) (step 736). If the step 736 is not satisfied, it is determined whether the evaporator passing temperature Teva is less than or equal to a preset temperature (about −1 ° C.) (step 738). If the step 738 is not satisfied, it is determined whether the coolant temperature Tcool is greater than or equal to a preset temperature (about 100 ° C.) (step 740). If the operation 730 is not satisfied, it is checked whether the OFF switch of the operation panel 30 is turned on (operation 742). If step 742 is not satisfied, it is checked whether the DEF switch is turned on (step 744). If the step 744 is not satisfied, it is checked whether the ECO switch is turned on (step 746). If step 746 is satisfied, it is determined whether the evaporator passing temperature Teva is less than or equal to 10 ° C. (step 748). If the operation 746 is not satisfied, the operation proceeds to operation 730. If the operation 748 is not satisfied, the operation proceeds to operation 740. If the operation 732 is not satisfied or the operations 734, 736, 738, 742, 744, Alternatively, when the operation 748 is satisfied, the command to turn off the compressor 4 is output to the EMS ECU 42b (operation 750). If step 740 is not satisfied, a command to turn on the compressor 4 is output to the EMS ECU 42b (step 752). If the operation 740 is satisfied, output signals of the ignition key, the throttle valve sensor, the crank angle sensor, and the engine rpm sensor are output to the EMS ECU 42b (step 754). When the ECO switch is on, the automatic temperature control device is operated in an economic mode, so the temperature passing through the evaporator 2 is set a little higher to minimize the operating time of the compressor. When the ambient temperature of the vehicle is lower than minus 1 ° C, the compressor and the evaporator may freeze and be damaged, so the compressor should be turned off. When the vehicle is to be accelerated at full speed (that is, the throttle valve opening is about 70 ° C. or more), the compressor is output by sending the output signal of the throttle valve sensor to the EMS ECU. If the coolant temperature is greater than or equal to the preset temperature (about 100 ° C.) in step 740, the engine speed may be preset if the rpm is greater than or equal to the preset value (5100 rpm) by the rpm sensor for detecting the engine speed. Turn off the compressor by receiving a signal from the EMS ECU until the set value (about 4600rpm) is less.

The present invention can automatically control the compressor as described above, the driver can easily operate the switch of the operation panel to make the interior of the vehicle a comfortable space.

Claims (4)

Mode change switch to select whether to control the vehicle's indoor temperature automatically or manually, Blower speed setting switch to set the vehicle's room temperature, Blower speed setting switch to set the blower's speed, A switch operating unit having air blowing direction setting switches for setting the blowing direction and switches for controlling the vehicle indoor temperature, a display indicating the indoor temperature set through the indoor temperature setting switches of the switch operating unit, detecting the indoor temperature of the vehicle Indoor temperature detection sensor, outdoor temperature detection sensor for detecting outdoor temperature of the vehicle, solar radiation detection sensor for detecting the amount of solar radiation, evaporator passing temperature sensor for detecting the temperature of cold air flowing into the vehicle, cooling water temperature detection sensor Reminding, with car ignition key on When the de-switching switch is in the automatic mode, the microcomputer generates the compressor control signal according to the result of comparing the detected temperature with the set temperature, or by operating the OFF switch, the ECO switch, and the DEF switch of the switch operation unit. EMS compressor for generating a compressor on / off signal in accordance with the compressed compressor control signal, and a compressor actuator for controlling the automobile compressor, characterized in that the compressor actuator for turning on / off according to the compressor on / off signal provided from the EMS ECU Device. Mode change switch to select whether to control the vehicle's indoor temperature automatically or manually, Blower speed setting switch to set the vehicle's room temperature, Blower speed setting switch to set the blower's speed, A switch operating unit having air blowing direction setting switches for setting the blowing direction and switches for controlling the vehicle indoor temperature, a display indicating the indoor temperature set through the indoor temperature setting switches of the switch operating unit, detecting the indoor temperature of the vehicle Indoor temperature detection sensor, outdoor temperature detection sensor for detecting outdoor temperature of the vehicle, solar radiation detection sensor for detecting the amount of solar radiation, evaporator passing temperature sensor for detecting the temperature of cold air flowing into the vehicle, cooling water temperature detection sensor Throttle Valve Opening Sensor, Crank When the mode changeover switch is in the automatic mode while the sensor, engine rpm sensor, and the car ignition key are on, the result of comparing the detected temperature and the set temperature, respectively, or operating the OFF switch, the ECO switch, and the DEF switch of the switch control unit. According to the microcomputer that generates a compressor control signal, an EMS ECU that generates a compressor on / off signal according to the compressor control signal generated by the microcomputer, and a compressor on / off according to the compressor on / off signal provided from the EMS ECU. A method for automatically controlling a compressor of a vehicle equipped with a compressor actuator, the method comprising: determining a current mode of the switch operation unit mode switching switch while the ignition key of the vehicle is on; determining the automatic mode in the mode switching switch current mode determination step The temperature set by the driver Determining whether the driver setting temperature is less than or equal to the room temperature, and if the driver setting temperature is greater than or equal to the room temperature, turning off the compressor, and determining whether the setting temperature is less than or equal to the outside temperature of the vehicle; Determining whether the set temperature is equal to or less than an external temperature; turning off the compressor when the set temperature is greater than or equal to an indoor temperature; and determining whether the detected external temperature is less than or equal to a preset external temperature by using the detected temperature. Determining whether the external temperature is less than or equal to the preset external temperature, and if the detected external temperature is less than or equal to the preset external temperature, turning off the compressor; A step of determining whether the evaporator passage temperature is less than the preset evaporator passage temperature The compressor is turned off when the evaporator passage temperature is equal to or lower than the preset evaporator temperature. And when the coolant temperature is less than the preset coolant temperature, turning on the compressor. The method as claimed in claim 2, further comprising: determining whether the switch operation unit is in an OFF switch when the current mode determination step of the mode switching switch is in the manual mode, and turning off the compressor when the OFF switch is on. If it is off, the step of determining whether the DEF switch is on, the step of determining whether the DEF switch is on, the step of determining whether the DEF switch is on, the compressor is off, and if it is off, determining whether the ECO switch is on, determining whether the ECO switch is on. In the step, if the ECO switch is turned on, the step of determining whether the evaporator passage temperature is below a predetermined temperature, and if the evaporator passage temperature is greater than the predetermined temperature, performs the step of determining whether the cooling water temperature is above a predetermined cooling water temperature. In the following case, the compressor further comprises the step of turning off the compressor Compressor automatic control method. The throttle valve opening degree and the rpm number are detected to determine whether the cooling water temperature is equal to or greater than a predetermined angle when the cooling water temperature is higher than a predetermined cooling water temperature when performing the step of determining whether the cooling water temperature is equal to or higher than the preset cooling water temperature. And turning off the compressor when the detected rpm number is greater than or equal to the preset upper rpm number, and turning off the compressor until it becomes less than the preset lower rpm number.

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