KR101527781B1 - Apparatus for automatical controlling cooling and heating using load compensating signal - Google Patents

Abstract

An automatic cooling and heating control apparatus for a railway vehicle using an applied load is disclosed.
According to an embodiment of the present invention, a temperature sensor for measuring a room temperature of a passenger compartment; A load sensing unit for sensing a load change according to a passenger density of the carriage; A cooling unit for cooling the inside of the passenger compartment; Wherein the control unit calculates the passenger density of the carriage from the detection result of the load sensing unit and activates the cooling unit when the room temperature provided from the temperature sensor is higher than a predetermined set temperature, (Final cooling temperature = preset temperature-load correction value) minus a predetermined load correction value in accordance with the calculated passenger density, have.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an automatic control system for cooling and heating a railway vehicle,

The present invention relates to a cooling and heating automatic control device for a railway vehicle, and more particularly, to a cooling and heating automatic control device for a railway car, which uses a load for temperature correction according to passenger density when cooling or heating a passenger car, .

Generally, a railway car is a means of transporting a large number of passengers in real time, and the number of passengers in a passenger car varies greatly during a short period of time due to a high rate of passenger recruitment in the station during the exit time.

The railway car is equipped with an air conditioner for the purpose of creating a pleasant indoor environment, and such an air conditioner can be operated to maintain the inside of the passenger compartment at a proper temperature.

Especially, recently, the number of railway vehicles having excellent transportation ability and convenience has been increasing, and air conditioners and heating devices have been installed in such railway cars to provide a comfortable environment for passengers.

In recent years, the concept of automatic control has gradually been introduced to detect the room temperature through the temperature sensor in the passenger compartment and to automatically control the cooling and heating to a preset room temperature .

For example, an automatic cooling and heating control apparatus for a railway vehicle includes a temperature sensor for sensing a room temperature and temperature information received from the temperature sensor through a communication interface at a predetermined time interval to a comprehensive control device, (Microcomputer control system) that automatically compares the current temperature with the preset temperature by automatically updating the existing set temperature when receiving the new set temperature information.

However, in the above-described automatic cooling and heating control apparatus for a railway vehicle, the temperature of each passenger compartment can be controlled only at a preset temperature, and the optimal temperature can not be controlled by reflecting the number of passengers in each passenger compartment. Accordingly, there is a problem that each carriage can not be maintained at the optimum temperature.

That is, in a conventional railway automobile cooling / heating control apparatus, the passenger compartment temperature is controlled to a set temperature without taking into consideration the passenger compartment passenger density (passenger density) of the railway car, and the cooling and heating is performed based on the indoor temperature near the temperature sensor There is a problem that the passenger feels a sense of thermal discomfort when a passenger is driven into a specific passenger compartment.

Actually, the temperature sensor is installed near the wall of the passenger car. The temperature measurement result is often different from the sensation temperature of the passenger in the passenger compartment. In particular, in the congestion time period when the passenger leaves the passenger room, , It is difficult to cope with the density of passengers due to the frequent feeling of heat and frustration.

On the other hand, when the number of passengers is suddenly reduced at a specific station, it may cause a problem of feeling uncomfortable due to excessive cooling and heating.

Korean Patent Publication KR10-2010-67308

Embodiments of the present invention detect a change in the number of passengers of a railway car according to the number of passengers at the time of congestion such as when leaving the exit, and correct the cooling or heating temperature of the passenger according to the passenger density, To provide an appropriate temperature environment at all times, it is intended to provide an automatic cooling and heating control apparatus for railway vehicles based on a correction temperature using a load.

According to an embodiment of the present invention, a temperature sensor for measuring a room temperature of a passenger compartment; A load sensing unit for sensing a load change according to a passenger density of the carriage; A cooling unit for cooling the inside of the passenger compartment; Wherein the control unit calculates the passenger density of the carriage from the detection result of the load sensing unit and activates the cooling unit when the room temperature provided from the temperature sensor is higher than a predetermined set temperature, To a temperature (final cooling temperature = set temperature-load correction value) obtained by subtracting a predetermined load correction value according to the calculated passenger density (load applied) in the automatic cooling control device May be provided.

Here, the control unit sets a reference load value indicating a ratio of the carriage to which the temperature correction is performed to the full load, and when the calculated passenger density is equal to or less than the reference load value, the load correction value is set to "0 & When the calculated passenger density exceeds the reference load value, the load correction value is set as "correction rate * (load value to calculated passenger density - reference load value)" .

Also, the reference load value is set to 70 to 95% of the full load.

And the correction ratio is set to 0.1 to 0.2.

The load sensing unit may include a pressure sensor for measuring an internal pressure of a plurality of air springs provided under the carriage.

According to another embodiment of the present invention, there is provided a temperature sensor for measuring a room temperature of a passenger compartment; A load sensing unit for sensing a load change according to a passenger density of the carriage; A heating unit for heating the inside of the passenger compartment; Wherein the control unit calculates the passenger density of the carriage from the detection result of the load sensing unit and activates the heating unit when the room temperature provided from the temperature sensor is lower than a predetermined set temperature, To a temperature (final heating temperature = set temperature-load correction value) obtained by subtracting a predetermined load correction value according to the calculated passenger density (load applied load) in the automatic heating control device May be provided.

Here, the control unit sets a reference load value indicating a ratio of the carriage to the full-load load in which the temperature correction is performed, and when the calculated passenger density is equal to or less than the reference load value, If the calculated passenger density exceeds the reference load value, the load correction value is set as "correction rate * (load value to calculated passenger density - reference load value)" Can be executed.

Also, the reference load value is set to 70 to 95% of the full load.

And the correction ratio is set to 0.1 to 0.2.

The load sensing unit may include a pressure sensor for measuring an internal pressure of a plurality of air springs provided under the carriage.

According to the embodiment of the present invention, the cooling and heating final target temperatures of the passenger compartment are appropriately corrected according to the variation of the passenger number of the passenger cars by the passenger cars in the congestion time zone, and then the cooling and heating units are controlled based on the corrected passenger density Can be provided.

In other words, by compensating for the disadvantage of the local temperature measurement method according to the position of the temperature sensor, it is possible to maintain the proper indoor temperature environment by correcting the control temperature of the passenger compartment according to the passenger density variation.

1 is a side view of a carriage equipped with an automatic cooling and heating control device for a railway vehicle using a load according to an embodiment of the present invention;
FIG. 2 is a block diagram of an automatic cooling control system for a railway car using a load according to an embodiment of the present invention.
FIG. 3 is a view showing a control logic of a control unit for performing temperature correction according to a load load signal in the cooling automatic control apparatus of FIG. 2;
FIG. 4 is a block diagram illustrating a heating automatic control apparatus for a railway vehicle using a load according to another embodiment of the present invention.
Fig. 5 is a diagram showing the control logic of the control unit for performing the temperature correction according to the load load signal in the automatic heating control apparatus of Fig. 4; Fig.

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

In describing the present embodiment, the same reference numerals and symbols are used for the same components, and further description thereof will be omitted.

First, an automatic cooling control system for a railway vehicle according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG.

FIG. 1 is a side view of a passenger car equipped with an automatic cooling and heating control device for a railway vehicle using a load according to an embodiment of the present invention. FIG. 2 is a cross- FIG. 3 is a view showing a control logic of a control unit for performing temperature correction according to a load load signal in the cooling automatic control apparatus of FIG. 2. FIG.

As shown in FIG. 1 and FIG. 2, an embodiment of the present invention relates to an automatic cooling control apparatus for a railway vehicle using a load, and includes a temperature sensor 100, a load sensing unit 200, (300) and a control unit (400).

1 is a partial view of a carriage constituting a railway vehicle. In general, a railway car 1 can be formed by connecting a plurality of carriages 10 to each other. Here, a railway car is a locomotive, a train, It can mean a means of transport where a plurality of carriages, such as cars and trains, are connected to each other and travel in orbit.

1 can be installed in the carriage shown in FIG. 1, the embodiment of the present invention is divided into a cooling automatic control device for cooling a railway vehicle and a heating automatic control device for heating 1 shows a cooling unit 300 and a heating unit 500 together, and the cooling unit 300 and the heating unit 500 can be selected and operated as necessary.

The temperature sensing sensor 100 is configured to measure the room temperature of each of the passenger cars constituting the railway car. The temperature sensor 100 may be installed in the passenger compartment, or two or more, as required.

In the present embodiment, a plurality of temperature sensors 100 may be used. For example, one sensor may be installed on the wall between the door and the shelf, and may be installed on the opposite door in the diagonal direction of the passenger compartment.

When two or more temperature sensing sensors 100 are used, the average value of the values measured by the temperature sensing sensors 100 may be estimated as the room temperature of the room. Since the temperature sensor 100 is a generally known component in the heating and cooling apparatus of a railway vehicle, the detailed description of the temperature sensor 100 will be omitted.

The load sensing unit 200 is configured to detect a change in load according to the passenger density or the passenger density of the passenger car. The load sensing unit 200 corrects the control temperature inside the passenger compartment according to the passenger density, It is possible to always provide an appropriate temperature environment.

In other words, when there are many passengers on a passenger coach, the temperature of the passenger's cabin rises due to the heat of the passengers, and the variation of the room temperature locally occurs due to the slow internal air circulation. However, conventionally, only the room temperature is measured without considering the passenger density at all, and only cooling (or heating) is performed between the room temperature and the set temperature. As a result, the passenger density It is possible to appropriately and efficiently control cooling and heating according to the temperature.

1 and 3, the load sensing unit 200 may include a pressure sensor 210 capable of measuring the internal pressure of a plurality of air springs 20 provided under the carriage.

Typically, each wheel of the carriage is provided with suspensions for improving ride comfort. An air spring 20 using compressed air can be used as a suspension for the railway vehicle.

The air spring 20 can be provided on the lower part of the carriage. If two carriages are provided for one carriage 10 and two wheels are provided on the left and right sides of each carriage, four air springs 20 are also installed The number of the air springs 20 may be changed according to the structure of the carriage 10 or the carriage structure.

3, the load sensing unit 200 may include a pressure sensor 210 for measuring the internal pressure of a plurality (for example, n) of the air springs 20, and the pressure sensor 210 210 and converts the air pressure into an electrical signal. When the pressure sensor 210 has two or more pressure sensors 210, the pressure sensor 210 averages the signals and outputs the result as a response load signal .

That is, although not shown separately, the load sensing unit 200 may include an idle converter and an averaging circuit that can calculate an average value of a plurality of electrical signals.

Therefore, it is possible to detect a change in load according to the passenger density or the passenger density inside the passenger car by the load signal (value) output from the load sensing unit 200.

The cooling unit 300 is configured to cool the inside of the passenger compartment and receives a control signal from the control unit 400 to cool the inside of the passenger compartment to a predetermined set temperature. Since it belongs to a widely known configuration, a detailed description is omitted.

The control unit 400 calculates the passenger density of the passenger car from the detection result of the load sensing unit 200 and compares the indoor temperature provided from the temperature sensor 100 with a predetermined set temperature in the control unit 400, The cooling unit 300 can be operated so that the room temperature of the indoor unit 10 reaches the set temperature.

According to the present embodiment, when the indoor temperature is lowered to the set temperature through the cooling unit 300, the temperature can be further corrected in accordance with the passenger density. Thus, the controller 400 can control the temperature of the finally- (Hereinafter referred to as "final cooling temperature") is calculated through the following equation (1) to perform temperature correction.

Equation 1) Final cooling temperature = set temperature - load correction value

Here, the load correction value is a value mapped to the controller 400 according to the calculated passenger density, and the load correction value can be calculated through the following equation (2).

Equation 2) Load Correction Value = Correction Rate * (Equivalent Load Value to Calculated Passenger Density - Reference Load Value)

Thus, in summary, the final cooling temperature is given by Equation 3 below.

Equation 3) Final cooling temperature = set temperature - correction factor * (() load value for the calculated passenger density - reference load value)

Here, the reference load value indicating a specific ratio of the carriage to the full load of the carriage is set in the controller 400, and the reference load value may be a starting point at which the controller 400 performs temperature correction.

That is, assuming that the tolerance load of the passenger car is 0% and the cumulative load is 100%, if the controller is set to perform the temperature correction when the passenger exceeds 70% of the full load, Is a starting point for executing temperature correction, and can be defined as a reference load value in the present embodiment.

Accordingly, for example, when a passenger of 70% or less of the full load is loaded, the controller 400 can perform the cooling so that the room temperature reaches the set temperature without performing any temperature correction.

That is, when the calculated passenger density is equal to or less than a predetermined reference load value (e.g., 70%) (load value relative to passenger density? Reference load value), the control unit 400 determines that the load correction value is & Cooling temperature = set temperature.

On the other hand, for example, when a passenger who exceeds 70% of the full load is boarded, the control unit 400 performs a separate temperature correction to perform cooling so that the room temperature falls further than the set temperature by a predetermined temperature have.

That is, when the calculated passenger density exceeds the predetermined reference load value (for example, 70%) (load value against passenger density> reference load value), the control unit 400 calculates the load correction value , The temperature correction can be performed by setting the correction rate * (load value to the calculated passenger density - reference load value).

Here, the reference load value is set in advance in the controller 400 and is a starting point for performing the temperature correction, and a value of 70% to 95% of the full load can be set.

According to the survey, when the load value of the passenger density on the railway vehicle exceeds 70% of the full load, it is understood that the passengers feel the ambient temperature change due to the passenger density (body heat, etc.) The temperature to be calibrated is insignificant and there is no significant meaning in temperature correction. Therefore, it is preferable that the reference load value is set to any value between 70 and 95% of the full load.

In addition, the correction rate means a temperature variation amount that is proportionally changed with respect to an increase in load (load) at the temperature compensation execution of the controller 400, and can be a coefficient for temperature correction. According to the present embodiment, The correction factor may be set to 0.1 to 0.2.

If the correction ratio is less than 0.1, the change in the temperature correction is too small to be meaningful. If the correction ratio is more than 0.2, the temperature variation will be too large even with a small change in the load, According to the experiment, it is preferable that the correction rate is set to any value between 0.1 and 0.2.

Hereinafter, when the following values are set in the controller 400, the cooling automatic control according to the passenger density is briefly shown.

Setting temperature: 25 ℃, Reference load value  : 70%, Correction rate  : 0.2

(E) Load value for passenger density
(Ratio of load to load) Final cooling temperature (캜) 0 (tolerance load) 25 (same as setting temperature) 70 25 (same as setting temperature) 71 25-0.2 * (71-70) = 24.8 (Temperature correction at 0.2 占 폚) 80 25-0.2 * (80-70) = 23 (temperature correction at 2 占 폚) 100 (full load) 25-0.2 * (100-70) = 19 (temperature correction at 6 占 폚)

4 and 5, a description will be given of an automatic heating control apparatus for a railway vehicle using a load according to another embodiment of the present invention.

FIG. 4 is a block diagram showing an apparatus for automatically controlling the heating of a railway vehicle according to another embodiment of the present invention. FIG. Lt; / RTI >

As shown in FIG. 4, another embodiment of the present invention relates to an automatic heating control apparatus for a railway vehicle using a load, comprising a temperature sensor 100, a load sensing unit 200, a heating unit 500, And a control unit 400 as shown in FIG.

Here, the temperature sensing sensor 100 and the load sensing unit 200 are the same as the temperature sensing sensor 100 and the load sensing unit 200 of the embodiment of the present invention.

The heating unit 500 receives the control signal from the control unit 400 and heats the inside of the passenger compartment to a predetermined set temperature. The heating unit 500 is a unit for heating the passenger compartment, The detailed description thereof will be omitted.

The control unit 400 calculates the number of passengers of the passenger car from the detection result of the load sensing unit 200 and compares the indoor temperature received from the temperature sensor 100 with a predetermined set temperature in the controller 400, The heating unit 500 can be operated when the temperature is lower than the set temperature.

According to the present embodiment, when the indoor temperature is raised to the set temperature through the heating unit 500, the temperature can be corrected in accordance with the passenger density. Thus, the controller 400 controls the indoor heating temperature , "Final heating temperature") is calculated through Equation 4 below to perform temperature correction.

Equation 4) Final heating temperature = set temperature - load correction value

Here, the load correction value is a value previously set in the controller 400 according to the calculated passenger density, and the load correction value can be calculated through the following equation (5).

Equation 5) Load Correction Value = Correction Rate * (Equivalent Load Value to Calculated Passenger Density - Reference Load Value)

Therefore, the final heating temperature is summarized in Equation 6 below.

Equation 6) Final Heating Temperature = Setpoint Temperature - Correction Rate * (Load Rating to Reference Passenger Density - Reference Load Value)

Here, the reference load value indicating a specific ratio of the carriage to the full load of the carriage is set in the controller 400, and the reference load value may be a starting point at which the controller 400 performs temperature correction.

That is, assuming that the tolerance load of the passenger car is 0% and the cumulative load is 100%, assuming that the temperature correction should be executed when more than 80% of the passengers are loaded on the full load, And may be defined as a reference load value in the present embodiment.

Accordingly, for example, when a passenger of 80% or less of the full load is boarded, the controller 400 can perform heating so that the room temperature reaches the set temperature without performing any temperature correction.

That is, when the calculated passenger density is equal to or less than the reference load value (for example, 80%) (the load value against the passenger density is the reference load value), the control unit 400 sets the load correction value to "0" Heating temperature = set temperature.

On the other hand, for example, when a passenger who exceeds 80% of the full load is boarded, the control unit 400 performs the temperature correction so as to perform the heating so that the room temperature is lower than the set temperature by a predetermined temperature .

That is, when the calculated passenger density exceeds the reference load value (for example, 80%) (load value against passenger density> reference load value), the control unit 400 calculates the load correction value , The temperature correction can be executed by setting the correction rate * (load value to calculated passenger density - reference load value).

Here, the reference load value is set in advance in the controller 400, and a value of 70 to 95% of the full load can be set as a starting point for executing the temperature correction. In this embodiment, Is set to 80%.

In addition, the correction rate means a temperature variation amount that is proportionally changed with respect to an increase in load (load) at the temperature compensation execution of the controller 400, and can be a coefficient for temperature correction. According to the present embodiment, The correction factor may be set to 0.1 to 0.2.

Hereinafter, when the control unit 400 is set to the following values, automatic heating control according to passenger density is briefly shown.

Setting temperature: 23 ℃, Reference load value  : 80%, Correction rate  : 0.1

Load value for passenger density
(Ratio of load to load) Final heating temperature (℃) 0 (tolerance load) 23 (same as setting temperature) 80 23 (same as setting temperature) 81 23-0.1 * (81-80) = 22.9 (temperature correction of 0.1 占 폚) 90 23-0.1 * (90-80) = 22 (temperature correction at 1 占 폚) 100 (full load) 23-0.1 * (100-80) = 21 (temperature correction at 2 占 폚)

While the present invention has been described in connection with what is presently considered to be preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that the invention is not limited thereto.

1: railway vehicle
10: carriage 20: air spring
100: Temperature sensing sensor 200: Load sensing unit
210: pressure sensor 300: cooling unit
400: control unit 500: heating unit

Claims (10)

A temperature sensor for measuring an indoor temperature of the passenger compartment;
A load sensing unit for sensing a load change according to a passenger density of the carriage;
A cooling unit for cooling the inside of the passenger compartment;
Wherein the control unit calculates the passenger density of the passenger compartment based on the detection result of the load sensing unit, activates the cooling unit when the room temperature provided from the temperature sensor is higher than a predetermined set temperature, (Final cooling temperature = preset temperature-load correction value) minus a preset load correction value in accordance with the calculated passenger density,
A reference load value indicating a ratio of the carriage to the full load of the carriage in which the temperature correction is performed is set in the control unit,
The load correction value is set to "0 " when the calculated passenger density is equal to or less than the reference load value,
And when the calculated passenger density exceeds the reference load value, the load correction value is set to "correction rate * (load value to calculated passenger density - reference load value)" to perform temperature correction. Automatic cooling control system of railway car. delete The method according to claim 1,
Wherein the reference load value is set to 70% to 95% of a full load. The method of claim 3,
Wherein the correction factor is set to 0.1 to 0.2. The method according to claim 1,
Wherein the load sensing unit includes a pressure sensor for measuring an internal pressure of a plurality of air springs provided under the carriage. A temperature sensor for measuring an indoor temperature of the passenger compartment;
A load sensing unit for sensing a load change according to a passenger density of the carriage;
A heating unit for heating the inside of the passenger compartment;
Wherein the control unit calculates the passenger density of the carriage from the detection result of the load sensing unit, activates the heating unit when the room temperature provided from the temperature sensor is lower than a predetermined set temperature, To a temperature obtained by subtracting a predetermined load correction value according to the calculated passenger density (final heating temperature = set temperature-load correction value)
A reference load value indicating a ratio of the carriage to the full load of the carriage in which the temperature correction is performed is set in the control unit,
The load correction value is set to "0 " when the calculated passenger density is equal to or less than the reference load value,
And when the calculated passenger density exceeds the reference load value, the load correction value is set to "correction rate * (load value to calculated passenger density - reference load value)" to perform temperature correction. Automatic heating control system for railway vehicles. delete The method according to claim 6,
Wherein the reference load value is set to 70 to 95% of the full load. 9. The method of claim 8,
Wherein the correction factor is set to 0.1 to 0.2. The method according to claim 6,
Wherein the load sensing unit includes a pressure sensor for measuring an internal pressure of a plurality of air springs provided under the carriage.

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