KR0167744B1 - Driving control method of airconditioning system for a vehicle - Google Patents

Abstract

The present invention relates to a method for adjusting an "on / off" mode of an air conditioning system of a vehicle. The external temperature sensor 200 detects an external temperature value Tamb by controlling an "on / off" mode of an air conditioning system. A first step, a second step of determining whether the external temperature value Tamb is lower than a predetermined temperature value (10 ° C.), and if it is low, a control value 2 of a predetermined value is added to the reference control value Tr. And adjusting the "on / off" mode of the cooling system 700 against the current control value Td1 and determining if the external temperature value Tamb is higher than the predetermined temperature value (30 ° C). If the result is low, adjust the reference control value Tr in inverse proportion to the external temperature value Tamb, and adjust the " on / off " mode of the heating / cooling system 700 in contrast to the current control value Td1. The control value (-2) of a certain value is added to the reference control value (Tr) and compared with the current control value (Td1). By performing the fourth step of adjusting the "on / off" mode of the system 700, it is possible to prevent the malfunction of the air conditioning system due to the over-sensing of each sensor, and by over-operation of the air conditioning system in winter or summer It is possible to prevent a large deviation between the internal temperature and the external temperature.

Description

How to control the air conditioning system of a car

The present invention relates to a heating and cooling system of a motor vehicle.

In particular, the present invention is to provide a heating and cooling system of the automotive heating and cooling system that can control the operating mode of the heating and cooling system by adding or subtracting the reference control value by the outdoor temperature value in switching the "on / off" mode of the heating and cooling system mounted on the vehicle It relates to an operation control method.

That is, according to the present invention, the reference control value set in order to switch the "on / off" mode of the air conditioning system (also called air conditioner) is corrected by the outdoor temperature value, and if the outdoor temperature value is high, the reference control value is set high. If it is low, the reference control value is set low, thereby controlling the "on / off" mode of the heating and cooling system in preparation for the current control value calculated by the surrounding environment.

Referring to FIG. 1, a configuration for controlling the "on / off" mode of an air conditioning system mounted on an automobile is provided by keys for manually setting the "on / off" mode of an air conditioning system or setting a desired temperature value. A keypad 800, an indoor temperature sensor 100 for detecting an indoor temperature value of a vehicle, an outdoor temperature sensor 200 for detecting an outdoor temperature value of an automobile, an insolation sensor 300 for detecting an amount of solar radiation, Water temperature sensor 400 for detecting the temperature value of the water circulated in the air-conditioning system, and the sensing value detected by each sensor 100, 200, 300, 400 to achieve the desired temperature value set by the key input The microcomputer calculates a current control value Td1 for switching the " on / off " mode of the heating / cooling system 700 and outputs a control signal of a “high / low” level against the reference control value Td. A processor 500 and the microprocessor "High / Low" level, the control signal is received the output from the processor 500 consists of a drive unit 600 for switching between the "on / off" mode, the air conditioning system 700.

In such a cooling and heating system, when the key of the keypad 800 is operated to set the “on / off” mode of the cooling and heating system 700, the microprocessor 500 may operate in the cooling system 700. A control signal of high " level is supplied to the base side of the transistor TR. Accordingly, since the transistor TR is maintained in the "on" state, the operation mode of the air conditioning system 700 is switched to the "on" state, and thus the air conditioning system 700 is operated. On the other hand, when the cooling and heating system 700 is to be stopped, the control signal of the "low" level is supplied to the base side of the transistor TR. As a result, the transistor TR maintains the " off " state, so that the operation mode of the air conditioning system 700 is maintained in the " off " state.

However, when the operation mode of the heating and cooling system 700 is switched to the automatic mode, the microprocessor 500 calculates the desired temperature value and the current control value by each sensor 100, 200, 300, 400. Thereby outputting a high / low level control signal for controlling the operation of the air conditioning system 700.

2, the microprocessor 500 first sets the desired temperature value Tset after the desired temperature value Tset is set and an indoor temperature value detected by the indoor temperature sensor 100. Tin), the outdoor temperature value Tamb detected by the outdoor temperature sensor 200, the solar radiation Tsun detected by the solar radiation sensor 300, the water temperature Tw detected by the water temperature sensor 400, and the like. The current control value Td is calculated by applying to Equation 1 described below.

[Equation 1]

Here, Td is the current control value compared with the reference control value in order to switch the "on / off" mode of the air conditioning system 700,

Tin is the room temperature value detected by the room temperature sensor 100,

Tamb is an outdoor temperature value detected by the outdoor temperature sensor 200,

Tsun is the amount of solar radiation detected by the solar radiation sensor 300,

Tset is the desired temperature value set by key input,

Tw is the water temperature set by the water temperature sensor 400,

α is a coefficient for correcting the current control value Td by the room temperature value Tin,

β is a coefficient for correcting the current control value Td by the outdoor temperature value Tamb,

γ is a coefficient for correcting the current control value Td by the outdoor temperature value Tamb,

δ is a coefficient for correcting the current control value Td by the desired temperature value Tset set by key input,

ε: The coefficient for correcting the current control value Td by the water temperature Tw.

That is, the microprocessor 500 determines the current operation mode of the air conditioning system 700 and then determines the operation mode of the air conditioning system 700 based on the current control value Td calculated by Equation 1 as described above. While the air conditioning system 700 is in the "off" state, the desired temperature value Tset, the indoor temperature value Tin, the outdoor temperature value Tamb, the solar radiation Tsun, the water temperature Tw, etc. When the calculated current control value Td is detected above the reference control value (in the present invention, the reference control value for switching the heating and cooling system 700 to the "on" mode is described as 4), the room temperature value is desired. It is determined that the temperature is higher than the temperature value, i.e., the environment inside or around the vehicle should drive the air conditioning system 700, and the "high" level control signal is supplied to the base side of the transistor TR to supply the air conditioning system 700. )).

In addition, based on the desired temperature value Tset, the indoor temperature value Tin, the outdoor temperature value Tamb, the solar radiation Tsun, and the water temperature Tw while the air conditioning system 700 maintains the "on" state. When the current control value Td calculated as is detected to be equal to or less than the reference control value (in the present invention, the reference control value for switching the heating and cooling system 700 to the "off" mode is described as 2), the room temperature value is It is determined that the temperature is lower than the desired temperature, that is, it is not necessary to operate the air conditioning system 700, and the operation of the air conditioning system 700 is stopped by supplying a "low" level control signal to the base side of the transistor TR. Let's do it.

Here, as shown in FIG. 2, the reference control value for switching the operation mode of the air conditioning system 700 to the "on" mode is 4, and the operation mode of the air conditioning system 700 is switched to the "off" mode. The reference control value of 2 indicates that the current control value (Td) calculated by the external temperature, internal temperature, solar radiation, water temperature, etc. after the operation mode of the heating / cooling system 700 is switched to the “on” mode or the “off” mode. ) Keeps the operation mode in progress if it does not fall or rise above a certain control value (2), so that the desired temperature value (Tset), indoor temperature value (Tin), outdoor temperature value (Tamb), solar radiation (Tsun), and water temperature ( The operation mode of the air conditioning system 700 is prevented from being switched in the case where Tw) and the like are minutely converted so that the current control value Td is converted. That is, the operation mode of the heating / cooling system 700 is frequently switched by the slight change of the surrounding environment to shorten the lifespan of the heating / cooling system 700 or the power consumption consumed by the conversion of the operating mode of the heating / cooling system 700. Can be reduced.

Furthermore, the indoor temperature of the car is controlled by the desired temperature value, the indoor temperature value, the outdoor temperature value, the amount of insolation, the water temperature, etc., so that it can provide a comfortable indoor space. However, any one of these sensors may malfunction or the desired temperature value ( Tset), indoor temperature value (Tin), outdoor temperature value (Tamb), solar radiation (Tsun), water temperature (Tw), etc., if detected incorrectly, the current control value is calculated larger or less than the actual value, Inadequate control of the " off " mode causes the problem that the room temperature value is adjusted excessively higher or lower than the desired temperature value.

In addition, although the driver's sensed temperature varies depending on the ambient temperature, that is, regardless of the ambient temperature, that is, the external temperature, the operating mode of the cooling and heating system is the same according to the desired temperature value, the indoor temperature value, the outdoor temperature value, the solar radiation value, and the water temperature As a result, the difference between the indoor temperature and the external temperature, which is controlled by the operation of the air conditioning system, increases as the external temperature increases or decreases.

The present invention has been made to solve the above-mentioned drawbacks, and the heating and cooling by raising or lowering the reference control value for switching the " on / off " mode of the cooling and heating system by the external temperature value which changes according to the season. By controlling the operation of the system, it is possible to prevent malfunction due to over-sensing of the sensor, and to prevent a large deviation between the internal temperature and the external temperature due to excessive operation of the air conditioning system in winter or summer. It is an object of the present invention to provide a method for controlling a heating and cooling system.

In order to achieve the above object, the present invention provides a first step of detecting an external temperature value Tamb by an outdoor temperature sensor in controlling an "on / off" mode of an air conditioning system, and an external temperature value Tamb. Is determined to be lower than a predetermined temperature value (10 ° C.), and if it is low, the control value 2 of a predetermined value is added to the reference control value Tr and the current control value Td1 and In contrast, the third step of determining whether the external temperature value Tamb is higher than a predetermined temperature value (30 ° C.) is adjusted by adjusting the " on / off " mode of the heating / cooling system. Inversely adjust the reference control value (Tr) and adjust the "on / off" mode of the heating and cooling system against the current control value (Td1), and if high, the control value (-2) of the constant value to the reference control value (Tr) And adjust the "on / off" mode of the heating and cooling system against the current control value (Td1). It is characterized by made of an fourth step.

1 is a block diagram showing a part of a general air conditioning system,

Figure 2 is a graph showing a state of controlling the "on / off" operating state of the heating and cooling system according to a control value variable by the ambient environment in a conventional heating and cooling system,

3 is a flowchart illustrating an operating state of a cooling and heating system according to the present invention;

4 is a graph showing a state of change of a reference control value by an external temperature value;

5 is a graph showing a state of controlling the "on / off" operating state of the cooling and heating system according to a control value variable by the ambient environment in the cooling and heating system according to the present invention.

* Explanation of symbols for main parts of the drawings

100: indoor temperature sensor 200: outdoor temperature sensor

300: solar radiation sensor 400: water temperature sensor

500: microprocessor 600: drive unit

700: air conditioning system 800: key pad

TR: Transistor

Hereinafter, a configuration according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the present invention provides a keypad 800 composed of keys for manually setting an “on / off” mode of a cooling system or setting a desired temperature value, and an indoor temperature value Tin of an automobile. The indoor temperature sensor 100 to detect, the outdoor temperature sensor 200 to detect the outdoor temperature value Tamb of the vehicle, the solar radiation sensor 300 to detect the solar radiation Tsun, and the temperature of the water circulated in the air conditioning system The water temperature sensor 400 for detecting the value Tw and the sensing value detected by the sensors 100, 200, 300, and 400 so as to achieve a desired temperature value Tset set by key input. By calculating the current control value (Td1) for switching the "on / off" mode of the cooling system 700 by comparing it with the reference control value (Td) according to the external temperature value Tamb of the cooling system 700 A microprocessor 500 for outputting a control signal of "high / low" level for switching the "on / off" mode; In addition, the driving unit 600 is configured to switch the “on / off” mode of the cooling system 700 by receiving a “high / low” level control signal output from the microprocessor 500.

3 is a flow chart showing the operating state of the vehicle air conditioning system 700 according to the present invention. In controlling the " on / off " mode of the air conditioning system 700, the external temperature sensor 200 A first step of detecting Tamb), a second step of determining whether the external temperature value Tamb is lower than a predetermined temperature value (10 ° C.), and if it is low, a control value of a predetermined value in the reference control value Tr. Add (2) and adjust the "on / off" mode of the heating and cooling system 700 against the current control value Td1, and if the external temperature value Tamb is higher than the predetermined temperature value (30 ° C), The third step of judging and, if the result is low, adjusts the reference control value Tr in inverse proportion to the external temperature value Tamb, and compares it with the current control value Td1 to " on / off " If the mode is adjusted and is high, the control value (-2) of a certain value is added to the reference control value (Tr) and compared with the current control value (Td1). By showing the carrying out the fourth step of controlling the "on / off" mode of the air conditioning system 700.

Here, when the external temperature value is determined to be a temperature value between 10 ° C and 30 ° C, the reference control value Tr is calculated in inverse proportion to the change in the external temperature value (20 ° C) and the change in the control value (4). If the external temperature is less than 10 ° C, the reference control value Tr is set to 2 and 0. If the external temperature is more than 30 ° C, the reference control value Tr is set to 6 and 4. (See FIG. 4).

5 is a graph showing a state of controlling the "on / off" operating state of the heating and cooling system 700 according to the reference control value that is variable by the ambient environment according to the present invention, when the external temperature value is less than 10 ℃ Compared to the reference control value Tr set to 2 and 0, the control value Td1 selects the " on / off " mode of the heating / cooling system 700. The current control value when the external temperature is higher than 30 ° C. The " on / off " mode of the air conditioning system 700 is selected by comparing Td1 with the reference control value Tr set to 6 and 4. FIG.

Next, the operation will be described.

After the desired temperature value Tset is set, the desired temperature value Tset, the indoor temperature value Tin detected by the indoor temperature sensor 100, and the outdoor temperature value Tamb detected by the outdoor temperature sensor 200. ), The solar radiation amount Tsun detected by the solar radiation sensor 300, the water temperature Tw detected by the water temperature sensor 400, etc. are applied to Equation 2 described below to calculate the current control value Td1. .

[Equation 2]

Here, Td1 is a current control value for switching the "on / off" mode of the air conditioning system 700,

Tin is the room temperature value detected by the room temperature sensor 100,

Tamb is an outdoor temperature value detected by the outdoor temperature sensor 200,

Tsun is the amount of solar radiation detected by the solar radiation sensor 300,

Tset is the desired temperature value set by key input,

Tw is the water temperature set by the water temperature sensor 400,

α is a coefficient for correcting the current control value Td1 by the room temperature value Tin,

β is a coefficient for correcting the current control value Td1 by the outdoor temperature value Tamb,

γ is a coefficient for correcting the current control value Td1 by the outdoor temperature value Tamb,

δ is a coefficient for correcting the current control value Td1 by the desired temperature value Tset set by key input,

ε is a coefficient for correcting the current control value Td1 by the water temperature Tw.

That is, the microprocessor 500 determines the current operation mode of the air conditioning and heating system 700, and then uses the reference control value according to the external temperature value Tamb based on the current control value Td1 calculated by Equation 2 as described above. In contrast to Tr, a "high / low" level control signal for switching the "on / off" mode of the air conditioning system 700 is output.

At this time, the microprocessor 500 outputs a "high / low" level control signal for operating the cooling and heating system 700 by comparing the current control value Td1 with the reference control value Tr, but the outdoor temperature sensor 200 Reference control value (Tr) is set to different values by the external temperature value Tamb detected by the), which will be described in more detail with reference to FIG.

First, the microprocessor 500 detects an external temperature value Tamb detected by the outdoor temperature sensor 200 (S1), and determines whether the temperature value is 10 ° C or less (S2).

When the external temperature value Tamb is 10 ° C. or less, as shown in FIG. 4, 2 is added to the conventional reference control value Td and set (S3), and the room temperature value Tin and the external temperature value Tamb. Calculates the current control value Td1 by the water temperature Tw, the solar radiation Tsun, and compares it with the reference control value Tr to set the " on / off " mode of the heating / cooling system 700 as shown in FIG. A control signal of a "high / low" level for switching is supplied to the cooling system 700 to control its operation (S4).

That is, when the external temperature value Tamb is less than or equal to 10 ° C, the current control value (Tset), the room temperature value Tin, the external temperature value Tamb, the water temperature Tw, the solar radiation amount Tsun, etc. When Td1) is calculated to be 6 or more, the operation mode of the air conditioning system 700 is switched to the "on" mode, and when the operation is calculated to 4 or less, the operation mode of the air conditioning system 700 is switched to the "off" mode. .

Here, the reference control value for switching the operation mode of the air conditioning system 700 to the "on" mode is 6, and the reference control value for switching the operation mode of the air conditioning system 700 to the "off" mode is 4; As in the conventional heating and cooling system, after the operation mode of the heating / cooling system 700 is switched to the “on” mode or the “off” mode, the current control value calculated by the external temperature, internal temperature, solar radiation, water temperature, etc. If Td1) does not fall or rise above a certain control value (2), it maintains the operation mode in progress so that desired temperature value Tset, indoor temperature value Tin, outdoor temperature value Tamb, solar radiation Tsun, and water temperature are maintained. The operation mode of the cooling and heating system 700 is prevented from being switched when (Tw) and the like are minutely converted so that the current control value Td1 is converted. That is, the operation mode of the heating / cooling system 700 is frequently switched by the slight change of the surrounding environment to shorten the lifespan of the heating / cooling system 700 or the power consumption consumed by the conversion of the operating mode of the heating / cooling system 700. Can be reduced (the description of these conditions is omitted below).

However, when the external temperature value Tamb is 10 ° C or more, it is subsequently determined whether the external temperature value Tamb is detected to be 30 ° C or more (S5).

As a result, when the external temperature value Tamb is 30 ° C. or more, as shown in FIG. 4, -2 is added to the conventional reference control value Td and set (S8), and the room temperature value Tin and the external temperature value ( The current control value Td1 is calculated by Tamb), the water temperature Tw, the solar radiation Tsun, and the like, and compared with the reference control value Tr, the " on / off " A control signal of "high / low" level for switching the mode is supplied to the cooling system 700 to control its operation (S9).

That is, when the external temperature value Tamb is 30 ° C or more, the current control value (Tset), the room temperature value Tin, the external temperature value Tamb, the water temperature Tw, the solar radiation amount Tsun, etc. When Td1) is calculated to be 2 or more, the operation mode of the air conditioning system 700 is switched to the "on" mode, and when the operation is calculated to 0 or less, the operation mode of the air conditioning system 700 is switched to the "off" mode. .

However, when the external temperature value Tamb is higher than 10 ° C. and lower than 30 ° C., the reference control value Tr is converted inversely to the change of the external temperature value Tamb as shown in FIG. 4, and is set (S6). The current control value Td1 is calculated by using the indoor temperature value Tin, the external temperature value Tamb, the water temperature Tw, the solar radiation amount Tsun and the like and compared with the reference control value Tr of the cooling system 700. A control signal of a "high / low" level for switching the "on / off" mode is supplied to the cooling system 700 to control its operation (S7).

Accordingly, in summer, when the external temperature value Tamb is high, the reference control value Tr is lowered and the control signal of the "high / low" level is supplied to the cooling system 700 as compared with the current control value Td1. In the winter, when the external temperature value Tamb is low, the reference control value Tr is increased and the current control value Td1 is supplied to the cooling system 700 as compared to the current control value Td1. By outputting a control signal of the, it is possible to achieve a stable operation of the air conditioning system 700, and also to reduce the difference between the room temperature and the outside temperature.

As mentioned above, the present invention is set by increasing the reference control value for switching the "on / off" mode of the air conditioning system in winter, when the external temperature is low, while in the summer when the external temperature is high, Set the reference control value to switch the on / off mode by setting it down and then switch the “on / off” mode of the heating / cooling system against the current control value to prevent malfunction of the heating / cooling system due to over-sensing of each sensor. It is possible to prevent, and to prevent a large deviation between the internal temperature and the external temperature due to excessive operation of the air conditioning system in winter or summer.

Claims (4)

In adjusting the "on / off" mode of the air conditioning system 700, A first step of detecting an external temperature value Tamb by the outdoor temperature sensor 200; A second step of determining whether the external temperature value Tamb is lower than a predetermined temperature value (10 ° C.); As a result, the control value (2) of a certain value is added to the reference control value (Tr) if it is low, and the "On / Off" mode of the heating / cooling system 700 is adjusted in contrast with the current control value (Td1), and if it is high A third step of determining whether the temperature value Tamb is higher than a predetermined temperature value (30 ° C.); As a result, if it is low, it adjusts the reference control value Tr in inverse proportion to the external temperature value Tamb, and adjusts the "on / off" mode of the heating / cooling system 700 in contrast to the current control value Td1, and if it is high, the reference control. And a fourth step of adjusting the " on / off " mode of the cooling and heating system 700 by adding a control value (-2) of a predetermined value to the value Tr and comparing it with the current control value Td1. Operation control method of a heating and cooling system of a car. The reference control value Tr according to claim 1, wherein when the external temperature value is determined to be a temperature value between 10 ° C and 30 ° C, the reference control value Tr is inversely proportional to the change in the external temperature value (20 ° C) and the change in the control value (4). Method of controlling the heating and cooling system of the vehicle, characterized in that it is made to calculate. The method of claim 1, wherein when the external temperature value is less than or equal to 10 ° C, the reference control value (Tr) is set to 2 and 0, and thus "on / off" of the air conditioning system 700 in preparation for the current control value (Td1). Method for controlling the heating and cooling system of the vehicle, characterized in that made to select the mode. The air conditioner according to claim 1, wherein the reference control value (Tr) is set to 6 and 4 when the external temperature value is 30 ° C. or higher, and the " on / off " of the air conditioning system 700 in preparation for the current control value Td1. Method for controlling the heating and cooling system of the vehicle, characterized in that made to select the mode.