JPH0785986B2 - Control method for vehicle air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for controlling a vehicle air conditioner, and more particularly to a method for controlling a vehicle air conditioner suitable for being installed in a train.

[Prior Art] A conventional air conditioner for a vehicle uses a temperature sensor, a humidity sensor, a pressure sensor of a body supporting air spring for estimating passengers, and the like to determine the output from each sensor as a condition for temperature and humidity control. Used for.

A device related to this type of device is, for example, Japanese Patent Publication No. 63-12834.

[Problems to be Solved by the Invention]

Since these sensors and auxiliary circuits are generally composed of a single system, if the characteristics of the sensor itself or the parts of the auxiliary circuit change over time, the control target value will change, and the air conditioner control There was a problem of poor performance, ie overcooling, overheating, or vice versa, requiring periodic readjustment of the circuit.

An object of the present invention is to automatically correct the control constant of the digital circuit portion without manually re-adjusting the analog circuit portion and to secure good control performance.

[Means for Solving the Problems]

The present invention inputs the value of the sensor of each air conditioner in a state where the environmental condition of the air conditioner of each vehicle is uniform, compares the output of each input sensor to determine the drift, and determines the drift of each sensor. The correction value is output to a corresponding air conditioner, and the value of its own sensor is corrected based on the correction value to perform air conditioning.

[Work]

When the environmental conditions of the air conditioner of each vehicle of the formation vehicle are uniform, for example, when the operation of the air conditioner is stopped before the vehicle starts commercial operation, a command is given to Enter the sensor value. Then, the input of each sensor is compared to determine the drift, and the correction value of each sensor is output to the corresponding air conditioner. Each air conditioner corrects the value of its own sensor based on the correction value to perform air conditioning. According to this, since the sensor detection value of each air conditioner is automatically corrected, the air conditioning of each vehicle can always be performed well.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. In the figure, 1 is an air conditioner mounted on each vehicle, and 2 is an air conditioning heating pump cycle. Reference numeral 3 denotes a control unit for controlling the operation of the vehicle, and reference numeral 4 denotes a central control device (for example, provided in a driver's cab of a leading vehicle or a passenger compartment of an intermediate car) corresponding to a central control means provided in a representative vehicle of a train. 5 and 6 are communication units for information transmission, 7 is a control command unit and display output unit at the time of information transmission, and 8 and 9 are information transmission paths. Reference numerals 10, 11 and 12 are a temperature sensor, a humidity sensor, an air spring pressure sensor, etc. used for measuring the conditions of temperature and humidity control of each air conditioner.

Next, the operation of this embodiment will be described.

When the environmental conditions of the entire formation vehicle are uniform, for example, when the operation of the air conditioner is stopped before the vehicle starts commercial operation, the control command unit 7 communicates the detection value of each sensor of each air conditioner. It is transmitted and output to the central control unit via the unit 5, the information transmission line 9, and the communication unit 6. Then, the output values from each vehicle are uniform in environmental conditions, so if each sensor and attached circuit are properly adjusted, each should show almost the same value (temperature, humidity, occupancy rate, etc.). is there. However, if there is a drift in each sensor itself or an attached analog circuit part, it will show another different value. As an example, FIG. 2 shows a graph of the temperature-output voltage in the case of the temperature sensor circuit, which will be described. The sensor output S ₀ that causes a drift at the temperature T is compared with the normally adjusted sensor output S _0. The output voltage will differ by ΔV.
As shown in FIG. 3, the output value of the air conditioner of each vehicle is within the allowable deviation dV from the reference range value (V _{n-1 in} this example).
All other data except for) and outside the range, the former average value V _ave as a control reference value, and a control command that sets the difference between the control reference value V _ave and each output value as each correction value. Part 7 This is transmitted to each air conditioner via the communication unit 6, the information transmission path 8, and the communication unit 5. The control unit 3 of each air conditioner performs the operation control of the cooling / heating hypotopump cycle after correcting the sensor output according to the correction value in the digital circuit portion.

〔The invention's effect〕

According to the present invention, even if a slight drift occurs in the detected value of each sensor, proper operation control of the air conditioner can be performed without performing readjustment of the analog circuit portion that has been conventionally performed, so that good control can be performed. Performance can be secured.

[Brief description of drawings]

FIG. 1 is a block diagram showing a control device of a vehicle air conditioner according to an embodiment of the present invention, FIG. 2 is a graph showing temperature-output voltage characteristics of a temperature sensor, and FIG. 3 is a central control device from each air conditioner. 6 is a graph for explaining a statistical process of sensor output values transmitted and output to the. 1 ... Air conditioner, 4 ... Central control unit, 8, 9 ... Information transmission path

Claims (1)

[Claims] 1. A sensor value of each air conditioner is input in a state where the environmental condition of the air conditioner of each vehicle is uniform, and the output of each sensor is compared to determine a drift. Is output to the corresponding air conditioner, and the value of its own sensor is corrected based on the corrected value to perform air conditioning, and a method for controlling a vehicle air conditioner.