JPS6410387B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle air conditioner.

Some conventional air conditioners of this type are used to cool trains. In this train cooling system, a temperature setting device installed in the train is manually operated, and the set temperature of the temperature setting device is used as a control target.

In such a train cooling system, the temperature inside the train is maintained at a set temperature without sufficiently considering the outside temperature. Therefore, if the temperature difference between the vehicle and the outside air is too large, passengers may feel uncomfortable when getting on and off the vehicle.

In addition, since the cooling load varies greatly depending on the passenger occupancy rate, simply using the set temperature of the temperature setting device as a control target will make it difficult to reduce the temperature inside the car when the occupancy rate is high; If the temperature was too low, it would become too cold and it was difficult to maintain the temperature within a comfortable range.

This invention was made to solve the above-mentioned problems, and is an air conditioner for a vehicle that can reduce discomfort when passengers get on and off the vehicle, and maintain a comfortable temperature inside the vehicle regardless of the occupancy rate. The purpose is to obtain.

In order to achieve this object, the vehicle air conditioner of the present invention includes a first temperature detector that detects the outside temperature of the vehicle, and a second temperature detector that detects the temperature near the ceiling inside the vehicle at multiple locations. a third temperature detector that detects the temperature near the floor inside the vehicle at a plurality of locations; and a cooling target temperature inside the vehicle corresponding to the outside temperature detected by the first temperature detector. and according to the deviation between the average value of the temperature detection values detected by the second temperature detector and the average value of the temperature detection values detected by the third temperature detector. A control device that calculates a cooling temperature correction value, corrects and outputs the cooling temperature target value using the cooling temperature correction value, and controls the vehicle according to the corrected cooling temperature target value output from the control device. It is equipped with an air conditioner for cooling the air conditioner.

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

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, an outside temperature detector 1 for detecting the temperature of outside air is provided on the outer wall of a train 10, and this detection signal is applied to a control device 5. On the other hand, inside the train 10, there are provided upper temperature detectors 2a and 2b that detect the temperature near the ceiling, and lower temperature detectors 3a and 3b that detect the temperature near the floor. A signal is applied to the control device 5. Here, the control device 5 outputs a control signal for the cooling device 4 based on the detection signals of these temperature detectors, and its configuration is shown in FIG.
In addition to the data tables shown in ~d, there is an average upper temperature calculation circuit that converts the output signals of the upper temperature detectors 2a and 2b into digital quantities and calculates the average value, and the output of the lower temperature detectors 3a and 3b. An average lower temperature calculation circuit that converts each signal into a digital quantity and calculates the average value, and
It has a subtracter and the like for determining the difference between these average values, and further has a converter and the like for converting the output signal of the vehicle exterior temperature detector 1 into a digital quantity.

Furthermore, the control device 5 includes arithmetic circuits and the like necessary for information processing, and here it sets the cooling temperature inside the train according to the outside air temperature, and adjusts the temperature near the ceiling and the temperature near the floor inside the train. A method of correcting the cooling temperature according to the difference between the two and operating the cooling device 4 using the corrected cooling temperature as a control target will be described with reference to the data table.

First, the data table 51 divides the expected fluctuation range of outside air temperature into a plurality of sections, and divides the range of expected fluctuations in outside air temperature into a plurality of sections, and sets them in descending order of outside air temperature: T ₁ to _{T 2} , T ₂ to _{T 3} , ..., Ti.
It has a plurality of indexes 1 to n corresponding to ~T _i+1 , ...T _o ~T _o+1 , and is searched by inputting the digitally converted signal of the temperature sensor 1 outside the vehicle. , find out which temperature range the outside temperature of the vehicle belongs to, and find an index i corresponding to that range.

Next, the data table 52 includes a plurality of indexes TS ₁ , TS ₂ ,..., which set the air conditioning temperature inside the car.
TS _i ...TS _o , these are data table 51
T ₁ to _{T 2} , T ₂ to T ₃ ,..., T _i to _{T i
+1} , ..., T _o to T _o+1 , respectively.For example, when the outside temperature is in the range of _T1 to _T2 , the target temperature for cooling inside the car (hereinafter also referred to as set temperature) is _TS1. Therefore, the outside temperature is T _i ~ _{T i+}
The data tables 51 and 52 correspond to each other so that when the temperature is within the range of ₁ , the set temperature becomes T S _i .

In this case, if the temperature outside the vehicle is within the range of index i of the data table 51, the set temperature TS inside the vehicle corresponding to the outside temperature T is determined from the determined index i.

That is, the cooling temperature inside the train can be set according to the outside air temperature of the train.

Next, the average upper temperature obtained by averaging the output signals of the upper temperature detectors 2a and 2b.
TU and the average lower temperature obtained by averaging the output signals of the lower temperature detectors 3a and 3b.
The deviation TD from TL is determined by an arithmetic circuit (not shown). This deviation TD roughly corresponds to the cooling load that changes depending on the passenger occupancy rate, and when the cooling load is large, this deviation TD is large.
On the other hand, when the cooling load is small, this deviation TD
becomes smaller.

Therefore, the expected variation range of temperature deviation is also divided into multiple sections, and they are divided into sections from TD 1 to TD ₁ in order of decreasing temperature deviation.
_TD2 , _TD2 ~ _TD3 ,... _TDi ~ _TDi+1 ,... _TDn ~
A data table 53 having a plurality of indexes corresponding to TD _n+1 is provided, and by inputting the temperature deviation signal TD, this data table 53 is searched to find the difference between the temperature near the ceiling and the temperature near the floor inside the car. It is determined to which temperature range the difference belongs, and an index J corresponding to that range is determined.

On the other hand, another data table 54 is provided corresponding to the data table 53, which has temperature indices TC ₁ , TC ₂ , ..., TC _J , ... TC _n , which are TD ₁ of the data table 52 . ~TD ₂ ,
These correspond to TD ₂ to TD ₃ ,...TD _J to TD _J+1 , and...TD _o to TD _o+1 , respectively.For example, the difference between the temperature near the ceiling and the temperature near the floor inside the car is the smallest.
If it is within the range of TD ₁ to _{TD 2} , a correction value that corrects the air conditioning target temperature in the car (hereinafter also referred to as correction temperature)
becomes TC ₁ , and as the temperature difference increases, TD _J ~
The data tables 53 and 54 correspond to each other so that when the range is TD _J+1 , TC _J is obtained.

Thus, the temperature difference inside the car is shown in the data table 53.
If the temperature is within the range of the index J, a correction temperature TC _J for correcting the set temperature TS can be found by searching with the index J.

Data table 52 obtained in this way
Set temperature TS and correction temperature of data table 54
Add TC to an arithmetic circuit (not shown) and calculate the difference TP
The control device 5 is configured to output a control command to the cooling device 4 by setting =TS−TC as the control target temperature.

In this way, when the outside air temperature is high, the control target temperature TP will also be high, and the temperature inside the car will be kept relatively high; conversely, when the outside air temperature is low, the control target temperature TP will also be low. As a result, the temperature inside the vehicle becomes relatively low, and as a result, discomfort when getting in and out of the vehicle can be kept to a low level.

On the other hand, when the occupancy rate is high and the cooling load is large, the correction temperature TC is large, which lowers the control target temperature TP and increases the cooling output. When the load is small, the corrected temperature TC is small, thereby increasing the control target temperature TP and operating with a reduced cooling output. As a result, the vehicle can be operated appropriately according to the occupancy rate, and the interior of the vehicle can be maintained within a comfortable temperature range.

In the above embodiment, a temperature sensor that outputs an analog signal was described, but if the temperature sensor itself outputs a digital signal, the output of this temperature sensor should be added to the control device 5. However, the same effect can be achieved.

Further, in the above embodiment, an air conditioner for cooling a train has been described, but the present invention is not limited to this, and can be applied to cooling other vehicles including buses.

As is clear from the above description, according to the vehicle air conditioner of the present invention, it is possible to suppress discomfort when getting on and off the vehicle, and to maintain a comfortable temperature inside the vehicle regardless of the occupancy rate.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the overall structure of an embodiment of the present invention, and FIGS. 2a to 2d are explanatory diagrams showing the detailed structure of a control circuit constituting the device. 1...Vehicle outside temperature detector, 2a+2b...Upper temperature detector, 3a, 3b...Lower temperature detector, 4...
...Cooling device, 5...Control device, 10...Train, 5
1, 52, 53, 54...data table.

Claims (1)

[Claims] 1. A first temperature detector that detects the outside temperature of the vehicle, a second temperature detector that detects the temperature near the ceiling inside the vehicle at multiple locations, and a second temperature detector that detects the temperature near the floor inside the vehicle at multiple locations. a third temperature detector;
A cooling target temperature inside the vehicle is determined in accordance with the outside temperature detected by the first temperature detector, and an average value of the temperature detection values detected by the second temperature detector is determined. A cooling temperature correction value is determined according to the deviation from the average value of the temperature detection value detected by the third temperature detector, and the cooling temperature target value is corrected and output using this cooling temperature correction value. An air conditioner for a vehicle, comprising: a control device that cools the vehicle according to a corrected cooling temperature target value output from the control device.