JPH10309923A - Local area network controller in vehicular air-conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means of ensuring reliability in actuating-command transmission from control amplifiers to door-motor actuators in a vehicular air-conditioning system while minimizing the number of local area networks laid therebetween. SOLUTION: A vehicular air-conditioning system comprises a controller having a console part with switches including a mode switch and a temperature setting dial, and an air-conditioning amplifier unit for processing input signals sent out from the switches and sensors with a microcomputer built therein according to the program software and for driving a fan motor and door actuators in the air-conditioning system under load. The amplifier unit involves a local area network, which is provided with a means of feeding communication data 301, 302,... to power lines instantaneously at regular time intervals T2 for its communication with as well as feed to the load.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a process for transmitting information between an air conditioner amplifier unit for a vehicle that drives and controls a plurality of door actuators and various temperature sensors, using a LAN [in-vehicle information communication network; Area network]].

[0002]

2. Description of the Related Art Conventionally, this kind of technology has been disclosed in Japanese Utility Model Application 5-1381.
2 shows an air conditioner for automobiles. This conventional example,
This is means for minimizing the increase in the number of harnesses connected to the motor actuator. A serial / parallel (P / S) converter is provided in each actuator, and the serial input / output terminals (P, Q) are connected in series so that n actuators can be controlled by one control amplifier.

[0003]

However, in the above-described air conditioner for an automobile, at least n harnesses from the control amplifier to each actuator are required, which reduces the number of harnesses, simplifies wiring, and reduces costs. It was an unsuitable means.

Here, the present invention is capable of reducing the operation lines from the air conditioner amplifier unit to the fan motors and the respective actuators to only the power supply lines to the respective units.
It is an object of the present invention to provide a control device for a local area network in a vehicle air conditioning system.

[0005]

[Means for Solving the Problems]

(Solution 1) The solution 1 of the above-mentioned problem is a controller having an operation unit provided with switches such as a mode switch and a temperature adjustment dial, and an input from switches and sensors by a built-in microcomputer. In a vehicle air conditioner system including an air conditioner amplifier unit for controlling a fan motor and a plurality of door actuators provided in the air conditioning system by processing signals according to program software, a local area network provided in the air conditioner amplifier unit In addition, there is provided a means for instantaneously putting communication data on a power supply line at predetermined time intervals so as to communicate with the fan motor and the plurality of door actuators.

[0006] In this way, lines other than the power supply line are not required, and the wiring is significantly reduced. In addition, the reduction in wiring reduces the possibility of picking up shock wave noise generated when the engine is ignited or stopped. Therefore, it is possible to achieve a special effect that communication obstruction due to noise absorption of the data is eliminated and contributes to improvement of reliability of information transmission.

(Solution 2) The solution 2 of the above problem is
The local air conditioner in the vehicle air conditioning system according to claim 1.
In the area network control device, the communication operation command information signal is modulated by a clock signal on the air conditioner amplifier unit side and sent to the fan motor or the plurality of door actuators via a local area network. The power supply voltage state is smoothed through a power supply smoothing circuit on the load side, and the power is supplied as a constant DC voltage power supply, and the signal modulated by the clock signal is demodulated and shaped to form the fan motor and the plurality of the motors. It is characterized by comprising means for controlling the door actuator.

Therefore, it is possible to provide the information communication means which can exhibit the effects of the first aspect and does not pick up noise generated in the power supply line itself from the modulation / demodulation means, and can ideally counter the noise in the vehicle. The effect that can be done is recognized.

(Solution 3) Solution 3 of the above-mentioned problem is:
3. The communication processing device for automatic temperature control of a vehicle air conditioner system according to claim 1, wherein the answer back of the operation from the fan motor or the plurality of door actuators is performed in the same manner as the operation command information signal. And transmitting the operation command information signal to the air conditioner amplifier unit through the local area network.

[0010] In this manner, the servo calculation of the operation command information signal is reliably performed, and the reliability of the automatic control can be further improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a vehicle air conditioner system provided with an air conditioner system to which the present invention is applied and provided with an air conditioner amplifier unit for driving and controlling a fan motor and a plurality of door actuators will be described with reference to FIG. I do.

Water temperature sensor 226, refrigerant sensor 227, inside air sensor 228, outside air sensor 229, solar radiation sensor 230
And an A / C / AMP unit 225 based on temperature information from the suction temperature sensor 231 and the like and manual input information from an operation unit 232b provided in the controller 232.
Performs all control calculations, and integrally drives each drive unit, that is, the fan control circuit 220, the intake door actuator 221, the bi-level actuator 222, the air mixer actuator 223, and the mode actuator 224, and outputs the current information thereof. operation·
The information is displayed on the display unit 232a via the display / communication circuit 232c, so that the optimum environmental temperature is constantly maintained. Note that 23
3 is an operation data line (RX is operation data), 234 is a clock signal line (CLK is a clock signal), and 235 is a display communication data line (TX is display communication data).

FIG. 1 is a block diagram showing a configuration of a main circuit of the embodiment.

FIG. 3 shows the power supply voltage waveform in FIG. 1, wherein FIG. 3 (a) shows the time course of the power supply voltage waveform on the actuator input side of the power supply line, and FIG. 3 (b) shows the power supply voltage waveform after smoothing in FIG. (C) is a waveform diagram which is the same as (a) but has a different observation point.

In FIG. 1, the same reference numerals as those in FIG. 2 denote the same or the same members.

Reference numeral 1 denotes a transmission terminal TX1 of an operation command information signal,
Reference numeral 12 denotes a clock terminal CLK for outputting a clock as a timing calculating means, and reference numeral 17 denotes reception terminals RX2, RX2 for receiving a fan control circuit 220 and an answerback signal relating to the operation of each of the actuators 221 to 224 based on the operation command information signal. 4,8,9,13,15,2
0,22,27,30,56,58,60,61,6
4, 65, 67, 70 are resistors, 3, 11, 14, 55,
62 is a transistor, 6, 7, 18, 51, 54 is a diode, 23, 24, 25, 52, 57, 68, 71
Is a capacitor, 21 is a comparison / amplifier (comparator), 10,
28 is a constant DC voltage power supply (for engine ignition), 19 is a relatively low constant DC voltage power supply, 41 and 42 are power supply lines (41a, 41b, 42a and 42b are their terminals), and 53 is a fan control circuit. 220 and a power supply terminal for supplying a DC voltage to an IC or the like in each of the actuators 221 to 224; 66, a transmission terminal TX2 for transmitting answer-back information; 73, a reception terminal for an operation command information signal;
5, 16, 26, 29, 31, 43a, 43b, 52
a, 59, 63, 69, and 72 are grounds.

In such a circuit configuration, when the operation command information signal is transmitted from the terminal 1, the signal is amplified by the transistor 3, and then the clock signal is converted into a modulation signal by the circuit of the transistor 11 as shown in FIGS. The signal is modulated like the voltage waveform of c), is superimposed on the power supply lines 41 and 42, and is transmitted to the actuator via the power supply lines 41 and 42.

Here, the voltage waveform modulated by the smoothing circuit of the diode 51 and the capacitor 52 provided in the preceding stage to the IC terminal 53 is smoothed, and various smoothed DC voltages as shown in FIG. Power is supplied to the IC circuit.

On the other hand, the operation command information signal to the fan control circuit 220 and each of the actuators 221 to 224 reaches the receiving terminal RX1 and, although not shown in the drawing, is a clock demodulation wave synchronized with the previous clock modulation wave. The original operation command information signal is demodulated and shaped to become an operation command information signal to each load.

Further, a fan control circuit 220 and each actuator 22 are connected to the answer back terminal TX2.
The operation states of Nos. 1 to 224 are amplified as a response feedback information signal / answerback signal to the amplifier side, superimposed on the power supply line, and transmitted. The amplifier side receives the signal through a comparison / amplifier 21 circuit. Although a modulation / demodulation circuit is not shown in this transmission system, it can be implemented in exactly the same manner as the system of the operation command information signal.

That is, according to the present invention, the communication data 301 to 304 are transmitted to the power line 4 by the A / C AMP unit 225.
1 and 42, the fan control circuit 220 and each of the actuators 221 to 224 communicate with their communication data 301.
３０４304 are received and the operation is performed as instructed. The IC power supply smoothes the signal and supplies it as a DC voltage to each element to complete the function as the power supply of the element.

[0022]

According to the first aspect of the present invention, a controller having an operation unit provided with switches such as a mode switch and a temperature adjustment dial, and a built-in microcomputer are used to control the switches and sensors. In a vehicle air conditioner system having an air conditioner amplifier unit that performs an arithmetic process on an input signal of the air conditioner in accordance with program software and drives and controls a fan motor and a plurality of door actuators provided in the air conditioner system, a local area provided in the air conditioner amplifier unit -The network is provided with means for instantaneously putting communication data on the power supply line at regular intervals and enabling communication with the fan motor and the plurality of door actuators. No lines are required, resulting in significant wiring reduction. At the same time, due to the reduced wiring, the shock wave noise generated when the engine is ignited / stopped is less likely to be picked up, eliminating the obstruction of communication due to the noise absorption in the vehicle and contributing to the improvement of the reliability of information transmission. Can be played.

According to a second aspect of the present invention, in the control device for a local area network in the air conditioning system for a vehicle according to the first aspect, the operation command information signal for communication is transmitted to the air conditioner amplifier unit by a clock signal. And sent to the fan motor and the plurality of door actuators through a local area network, and a smoothed power supply voltage state through a power supply smoothing circuit at the load side as a constant DC voltage power supply. A power supply unit is provided, which further comprises means for controlling the fan motor and the plurality of door actuators by demodulating and shaping a signal modulated by the clock signal. Also, it does not pick up the noise generated in the power line itself from the modulation / demodulation means. Effect is observed, which may be information communication means ideally can counter.

According to a third aspect of the present invention, in the communication processing device for automatic temperature control of a vehicle air conditioner system according to the first or second aspect, an answer of an operation from the fan motor or the plurality of door actuators. Means for modulating the operation command information signal in the same manner as the operation command information signal, transmitting the modulated signal to the air conditioner amplifier unit via the local area network, demodulating and shaping, and confirming the transmission of the operation command information signal. Therefore, the operation command of the operation command information signal is confirmed, the servo calculation is reliably performed, and the effect that the reliability of the automatic control can be further improved is remarkable.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a main circuit according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a circuit configuration according to an embodiment of the present invention.

FIG. 3 is a time lapse diagram showing a power supply voltage waveform in FIG. 1;

[Description of Signs] 1 Transmission terminal TX1 of operation command information signal 2, 4, 8, 9, 13, 15, 20, 22, 27, 3
0,56,58,60,3,11,14,55,62
Transistors, 5, 16, 26, 29, 31, 43a, 43b, 52
a, 59, 63, 69, 72 Ground 6, 7, 18, 51, 54 Diode 10, 28 Constant DC voltage power supply (for engine ignition) 12 Clock terminal CLK 17 Receive terminal RX2 19 Relatively low constant DC voltage power supply 21 Comparison / Amplifier (Comparator) 23, 24, 25, 52, 57, 68, 71 Capacitors 41, 42 Power supply lines (41a, 41b, 42)
a, 42b are those terminals) 53 a power supply terminal for supplying a DC voltage to an IC or the like 61, 64, 65, 67, 70 resistance 66 transmission terminal TX2 73 reception terminal 201 intake unit case 202 outside air side intake port 203 indoor side intake port 204 blower fan 205 blower fan motor 206 intake door 207 cleaning unit case 208 evaporator 209 heater unit case 210 vent suction outlet 211 differential suction outlet 212 foot suction outlet 213 hitter core 214 bilevel door 215 mix door 216 vent door 217 differential door 218 foot door 220 fan control Circuit 221 Intaker actuator 222 Bilevel door actuator 223 Air mix door actuator 224 Mode door door Tutor 225 A / C / AMP unit 226 Water temperature sensor 227 Refrigerant sensor 228 Inside air sensor 229 Outside air sensor 230 Solar radiation sensor 231 Suction temperature sensor 232, 232z Controller 232a Display unit 232b Operation unit 232c Operation / display / communication circuit 232d Constant memory 233 Operation data Line (RX is operation data) 234 Clock signal line (CLK is clock signal) 235 Display communication data line (TX is display communication data)

Claims (3)

[Claims] 1. A controller having an operation unit provided with switches such as a mode switch and a temperature adjustment dial, and a built-in microcomputer which performs an arithmetic process on input signals from the switches and sensors according to program software. In a vehicle air conditioner system including an air conditioner amplifier unit that drives and controls a fan motor and a plurality of door actuators provided in an air conditioner system, the air conditioner communicates with a local area network provided in the air conditioner amplifier unit at regular intervals. Means for instantaneously transferring data to a power supply line and communicating with the fan motor and the plurality of door actuators.
Area network controller. 2. The control device for a local area network in a vehicle air conditioning system according to claim 1, wherein said communication operation command information signal is modulated by a clock signal on said air conditioner amplifier unit side.・ Sending it to the fan motor or the plurality of door actuators via a network, and then supplying a constant DC voltage power to a smoothed power supply voltage state via a power supply smoothing circuit on the load side, and supplying the clock signal with the clock signal. Means for demodulating and shaping the modulated signal to control the fan motor and the plurality of door actuators.
Area network controller. 3. The communication processing device for automatic temperature control of a vehicle air conditioner system according to claim 1, wherein an answer back signal of an operation from said fan motor or said plurality of door actuators is transmitted to said operation command. Means for modulating in the same manner as the information signal, transmitting to the air conditioning amplifier unit via the local area network, demodulating and shaping, and confirming transmission of the operation command information signal. Control device for local area network in vehicle air conditioning system.