KR102103438B1 - Output duty rate control system and method using change of setting temperature - Google Patents

Abstract

The present invention is the output duty of the electromagnetic control valve (Electro Magnetic Control Valve) as the user operates by raising or lowering the set temperature arbitrarily in the state that the start of the vehicle is on and the air conditioner for the vehicle is operating (On). The present invention relates to a method and system for controlling an output duty ratio according to a change in a set temperature, such that an output duty rate is raised or lowered instantaneously and then returned to an automatically calculated duty value from the outside temperature at a time difference.
The output duty ratio control system according to the present invention includes: a temperature detection unit 210 for detecting room temperature; An input manipulation unit 220 for receiving a set temperature for the detected room temperature; A duty ratio storage unit 230 that stores an output duty ratio corresponding to the set temperature; The ECV driving unit 240 that electronically opens and closes the expansion valve according to the output duty ratio, and when the set temperature is changed, transmits the output duty ratio corresponding to the changed set temperature to the ECV driving unit 240, The ECV driving unit 240 is characterized in that it comprises a control unit 250 for controlling to perform the opening and closing operation of the expansion valve according to the output duty ratio.

Description

Output duty rate control system and method using change of setting temperature}

The present invention relates to an output duty ratio control method and system according to a set temperature change, and more specifically, in a state in which the vehicle is started and the air conditioner for the vehicle is operating (On), the user can arbitrarily set the set temperature. By increasing or descending the output duty rate of the electromagnetic control valve (Electro Magnetic Control Valve) according to the operation by rising or falling instantaneously, and then returning to the duty value automatically calculated from the outside temperature with a time difference, The present invention relates to a method and system for controlling an output duty ratio according to a change in a set temperature, so as to reduce fuel consumption due to the use of an air conditioner.

In general, an air conditioner for a vehicle is an interior product installed for the purpose of securing the front and rear view of the driver by cooling or heating the interior of a vehicle in summer or winter, or removing frost on the windshield during winter in rainy weather.

Such an air conditioner is usually equipped with a heating system and a cooling system at the same time, so that the air of the vehicle is cooled, heated, or ventilated by selectively introducing outside air or air and heating or cooling this air to blow it into the interior of the vehicle.

The cooling system of the air conditioner is configured to circulate while forcibly changing a refrigerant, which is a heat exchange medium, along a refrigeration cycle, to radiate heat in the vehicle interior to the outside by cooling the heat of the vehicle, thereby cooling the vehicle interior.

1 is a block diagram of a cooling system of a general air conditioner.

As shown in FIG. 1, the cooling system of a conventional air conditioner includes a compressor (1) for compressing refrigerant, a condenser (2) for condensing and liquefying the refrigerant compressed in compressor (1), a condenser (2) Receive Drier (3) that filters out and discharges only the liquid refrigerant from the refrigerant in which the liquid phase and gas phase are mixed, and an expansion valve that expands the liquid refrigerant filtered by the receiver (3). (4), and the evaporator (Evaporator) (5) for cooling the air blown into the car interior using the evaporation latent heat of the refrigerant while evaporating the refrigerant expanded in the expansion valve (4).

Refrigerant circulation process of the air conditioner described above, first, the compressor 1 is driven by the power of the engine while compressing the low-temperature and low-pressure refrigerant to discharge to the condenser 2, the condenser 2 is a high temperature and high pressure by the compressor (1) The refrigerant is condensed by the blowing action of a cooling fan (not shown) to make it a medium temperature high pressure liquid.

The refrigerant from the condenser (2) in the state of medium and high pressure is filtered by only the liquid refrigerant in the receiver (3) and then expanded by the expansion valve (4) to be sent to the evaporator (5) in the low-temperature, low-pressure wetted gas state. , The evaporator 5 evaporates the expanded refrigerant by heat exchange with air blown into the vehicle interior and sends it back to the compressor 1 in a gaseous state.

At this time, the blower fan introduces indoor / outdoor air to the car and blows it through the evaporator 5 to the car interior, so that the blown air is cooled by the latent heat of evaporation of the liquid refrigerant in the evaporator 5 and then enters the car interior. It will be cooled.

However, in the cooling system of the air conditioner as described above, since the amount of air blown to the condenser 2 increases when driving, the condensation rate of the refrigerant by the condenser 2 increases, so the refrigerant pressure decreases and the discharge pressure of the compressor 1 decreases. On the other hand, during the idle operation, the refrigerant in the condenser 2 is condensed depending only on the air volume of the blower fan, so the condensation rate of the refrigerant is lowered to increase the refrigerant pressure, and accordingly the discharge pressure of the compressor 1 is increased to cool. Performance decreases. Therefore, there is a problem in that fuel efficiency is increased according to the use of the air conditioner.

Korea Patent Publication No. 2013-0088258 (Publication date: August 8, 2013)

An object of the present invention for solving the above-mentioned problems is electromagnetic control according to a user arbitrarily raising or lowering a set temperature while the vehicle is started and the vehicle air conditioner is operating (On). It is possible to reduce fuel consumption due to the use of an air conditioner by instantaneously raising or lowering the output duty rate of the valve (Electro Magnetic Control Valve) and then returning it to the automatically calculated duty value from the outside temperature at a time difference. It is to provide an output duty ratio control method and system according to a change in a set temperature.

According to an aspect of the present invention for achieving the above object, a temperature detection unit 210 for detecting the indoor temperature; An input manipulation unit 220 for receiving a set temperature for the detected room temperature; A duty ratio storage unit 230 that stores an output duty ratio corresponding to the set temperature; The ECV driving unit 240 that electronically opens and closes the expansion valve according to the output duty ratio, and when the set temperature is changed, transmits the output duty ratio corresponding to the changed set temperature to the ECV driving unit 240, An output duty ratio control system is provided that includes a control unit 250 that controls the ECV driving unit 240 to perform an opening / closing operation of an expansion valve according to an output duty ratio.

In addition, the input operation unit may include an operation button for receiving a command to increase or decrease the set temperature.

In addition, the vehicle may further include a startup sensor 260 that detects whether the vehicle is in an on or off state.

In addition, the controller 250 receives a set temperature through the input manipulation unit 220 when the vehicle is started in an ON state and an air conditioner is in an ON state.

In addition, the output duty ratio includes a first output duty ratio (A) and a second output duty ratio (B), and the controller 250 provides a second output duty ratio (B) for raising the temperature at 0 ° C. Adjusted to be larger than the 1 output duty ratio (A), and adjusted so that the first output duty ratio (A) and the second output duty ratio (B) are equal at an ambient temperature of 20 ° C, and the first for temperature drop at an ambient temperature of 40 ° C. Only the output duty ratio (A) is adjusted.

In addition, the duty ratio storage unit 230 stores the determined value by tuning for each vehicle model for the output duty ratio corresponding to the set temperature.

Meanwhile, according to another aspect of the present invention for achieving the above object, the temperature detection unit 210 and the input operation unit 220, the duty ratio storage unit 230, the ECV driving unit 240, the control unit 250, start detection An output duty ratio control method according to a change in the set temperature of the air conditioning system including the unit 260 and the display unit 270, (a) the current temperature detected by the temperature detector 210 through the display unit 270 Displaying; (b) receiving a set temperature for the current temperature through the input manipulation unit 220; (c) selecting an output duty ratio corresponding to the input set temperature from the duty ratio storage unit 230; (d) transmitting the selected output duty ratio to the ECV driver 240; And (e) the ECV driving unit 240 performing an opening / closing operation of the expansion valve according to the output duty ratio.

In addition, in step (b), the rising or falling set temperature may be input through the input manipulation unit 220.

In addition, the rising or falling width may be determined by the amount of change in the set temperature input through the input manipulation unit 220 and the outside air temperature detected through the temperature detection unit 210.

In addition, in step (b), when the vehicle is started in an ON state and the operation of an air conditioner is in an ON state, a set temperature is input through the input manipulation unit 220. You can.

In addition, in step (c), the output duty ratio corresponding to the set temperature is a value determined by tuning for each vehicle type.

In addition, the output duty ratio includes a first output duty ratio (A) and a second output duty ratio (B), and selecting the output duty ratio comprises: a second output duty ratio for raising the temperature at 0 ° C. B) is adjusted to be greater than the first output duty ratio (A), and the first output duty ratio (A) and the second output duty ratio (B) are adjusted at an ambient temperature of 20 ° C, and the temperature drops at an ambient temperature of 40 ° C. Only the first output duty ratio (A) for is controlled.

According to the present invention, it is possible to reduce fuel consumption according to the use of the air conditioner of the vehicle.

In addition, as the operating temperature is raised or lowered, the duty ratio of the control valve is instantaneously applied to provide the driver with an impact on the set temperature change.

And, it is possible to control the operating condition of the air conditioner to maximize the performance of the engine.

1 is a block diagram of a cooling system of a general air conditioner.
2 is a block diagram showing a functional block of an output duty ratio control system according to an embodiment of the present invention.
3 is a view showing an operation flowchart for explaining an output duty ratio control method according to a change in a set temperature of an air conditioning system according to an embodiment of the present invention.
4 is a diagram illustrating an example of an output duty ratio control corresponding to a set temperature according to an embodiment of the present invention.

The present invention can be applied to various changes and can have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail. However, it is not intended to be limited to the specific embodiments of the present invention, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

An embodiment of an output duty ratio control method and system according to a change in a set temperature according to the present invention will be described in detail with reference to the accompanying drawings. In describing with reference to the accompanying drawings, identical or corresponding elements are assigned the same reference numbers, and redundant description thereof will be omitted.

2 is a block diagram showing a functional block of an output duty ratio control system according to an embodiment of the present invention.

Referring to FIG. 2, the output duty ratio control system 200 according to an embodiment of the present invention includes a temperature detection unit 210, an input operation unit 220, a duty ratio storage unit 230, and an electronic control valve (ECV) driving unit 240, a control unit 250, a start detection unit 260 and a display unit 270.

The temperature detection unit 210 detects the indoor or outdoor temperature of the vehicle.

The input manipulation unit 220 receives a set temperature for the detected room temperature from a user. At this time, the input manipulation unit 220 may include an operation button for receiving a command to increase or decrease the set temperature.

The duty ratio storage unit 230 stores the output duty ratio corresponding to the set temperature as shown in Table 1. In addition, the duty ratio storage unit 230 stores the determined value by tuning for each vehicle model for the output duty ratio corresponding to the set temperature.

For example, as shown in Table 1, the relationship between the output duty ratios A and B according to the outside air temperature is adjusted to a larger B duty for temperature rise at the outside air temperature of 0 ° C, and the A and B duty are equal to the outside air temperature of 20 ° C. It is controlled, and only the A duty for the temperature drop at 40 ° C outside temperature is controlled.

The ECV driving unit 240 electronically executes the opening / closing operation of the expansion valve according to the output duty ratio.

When the set temperature is changed, the control unit 250 transmits an output duty ratio corresponding to the changed set temperature to the ECV driving unit 240 so that the ECV driving unit 240 performs an opening / closing operation of the expansion valve according to the output duty ratio. Control.

In addition, the control unit 250 receives the set temperature through the input operation unit 220 when the vehicle is started in an ON state and the operation of an air conditioner is in an ON state.

The start detection unit 260 detects whether the start of the vehicle is on (ON) or off (OFF).

The display unit 270 displays the current temperature detected through the temperature detection unit 210, or displays an operating state of the system.

Here, the output duty ratio control system 200 according to an embodiment of the present invention, as described in the technology that is the background of the invention compressor (1), condenser (2), receiver (3), expansion valve (4) And the 'air conditioning system' including the evaporator 5.

3 is a view showing an operation flowchart for explaining an output duty ratio control method according to a change in a set temperature of an air conditioning system according to an embodiment of the present invention.

Referring to FIG. 3, the air conditioning system 200 according to an embodiment of the present invention first displays the current temperature detected by the control unit 250 through the temperature detection unit 210 through the display unit 270 (S310).

Therefore, the user checks the current temperature displayed through the display unit 270, and when the room temperature of the current vehicle is higher than the desired temperature, lowers the set temperature to be lower than the current temperature, and when the current temperature is lower than the desired temperature. In order to increase the set temperature, a command is input through the operation button.

Thus, the control unit 250 receives the set temperature for the current temperature through the input operation unit 220 (S320).

Here, the control unit 250 may receive the rising or falling set temperature through the input manipulation unit 220.

At this time, the rising or falling width may be determined by the amount of change in the set temperature input through the input manipulation unit 220 and the outside temperature detected through the temperature detection unit 210.

In addition, the control unit 250 may receive the set temperature through the input operation unit 220 when the vehicle is in the ON state and the operation of the air conditioner is in the ON state.

Subsequently, the control unit 250 selects an output duty ratio corresponding to the set temperature from the duty ratio storage unit 230 (S330).

At this time, the output duty ratio corresponding to the set temperature stored in the duty ratio storage unit 230 is a value determined by tuning for each vehicle model. That is, as shown in Table 1, for the output duty ratios (A, B) according to the outside temperature, the B duty for increasing the temperature at 0 ° C. is further adjusted, and the A and B duty at 20 ° C. is adjusted in the same way. In addition, only the A duty for the temperature drop at 40 ° C outside temperature is controlled.

Here, the control unit 250 determines the output duty ratio according to the set temperature based on the duty ratio storage unit 230 as shown in FIG. 4. 4 is a diagram illustrating an example of an output duty ratio control corresponding to a set temperature according to an embodiment of the present invention. When the set temperature rises, the control unit 250 gradually returns to the calculation control state over a period of time after the ECV duty ratio rises momentarily, or when the set temperature decreases, the ECV duty ratio decreases instantaneously to return to the calculation control state over time. .

The rise or fall width is determined by the amount of change in the set temperature and the outside temperature, and when returning to the calculation control state after the instant rise or fall, the control can be tuned depending on the performance.

On the other hand, the release condition of this operation can be released when the vehicle is started off or the air conditioner is off, and can also be released after the driver has finished operating the set temperature.

Subsequently, the controller 250 transmits the selected output duty ratio to the ECV driver 240 (S340).

Therefore, the ECV driving unit 240 performs an opening / closing operation of the expansion valve according to the output duty ratio (S350).

That is, while the compressor 1 is driven by the engine power, the refrigerant at low temperature and low pressure is compressed and discharged to the condenser 2, and the condenser 2 uses the compressor 1 to blow the high temperature and high pressure refrigerant into the cooling fan. It is condensed to make a medium temperature high pressure liquid.

The refrigerant from the condenser (2) in the state of medium and high pressure is filtered by only the liquid refrigerant in the receiver (3), and then the refrigerant is expanded by an expansion valve (4) that is opened and closed in accordance with the output duty ratio, resulting in a low-temperature low-pressure saturation gas. It is sent to the evaporator 5 in a state, and the evaporator 5 evaporates the expanded refrigerant by heat exchange with air blown into the vehicle interior and sends it back to the compressor 1 in a gaseous state.

The blower fan introduces indoor / outdoor air into the car and blows it through the evaporator 5 to the car interior, so that the blown air is cooled by the latent heat of evaporation of the liquid refrigerant in the evaporator 5 and then flows into the car interior, thereby cooling the car interior. .

As described above, according to the present invention, the electromagnetic control valve (Electro magnetic) according to the user's arbitrarily raising or lowering the set temperature while the vehicle is started and the air conditioner for the vehicle is operating (On) This is a setting that reduces the fuel consumption associated with the use of the air conditioner by temporarily increasing or decreasing the output duty rate of the control valve, and then returning it to the automatically calculated duty value from the outside temperature at a time difference. The output duty ratio control method and system according to the temperature change can be realized.

Those skilled in the art to which the present invention pertains should understand that the embodiments described above are illustrative and non-limiting in all respects, as the present invention may be implemented in other specific forms without changing its technical spirit or essential features. Only. The scope of the present invention is indicated by the following claims rather than the above detailed description, and it should be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. do.

The present invention increases the output duty rate (Output duty rate) of the electromagnetic control valve (ECV) as the user arbitrarily raises or lowers the set temperature and then operates it, and then automatically calculates the duty from the outside temperature at a time difference. By returning to the value, it can be applied to an output duty ratio control method and system according to a change in a set temperature, which can reduce fuel consumption due to the use of an air conditioner.

1: Compressor 2: Condenser
3: receiver 4 expansion valve
5: evaporator 200: output duty ratio control system
210: temperature detection unit 220: input operation unit
230: duty ratio storage unit 240: ECV drive unit
250: control unit 260: start detection unit
270: display unit

Claims (12)

A temperature detector 210 for detecting room temperature;
An input manipulation unit 220 for receiving a set temperature for the detected room temperature;
A duty ratio storage unit 230 that stores an output duty ratio corresponding to the set temperature;
Electronic control valve (ECV) driving unit 240 for electronically opening and closing the expansion valve according to the output duty ratio, and
When the set temperature is changed, the output duty ratio corresponding to the changed set temperature is transmitted to the ECV driving unit 240 to control the ECV driving unit 240 to perform an opening / closing operation of the expansion valve according to the output duty ratio Control unit 250;
Including,
The output duty ratio includes a first output duty ratio (A) and a second output duty ratio (B),
The control unit 250 adjusts the second output duty ratio B for increasing the temperature at 0 ° C. higher than the first output duty ratio A, and the first output duty ratio A at 20 ° C. ) And the second output duty ratio (B) are adjusted to be the same, and the output duty ratio control system characterized in that only the first output duty ratio (A) for temperature drop at 40 ° C. is adjusted.
The method according to claim 1,
The input operation unit 220, the output duty ratio control system, characterized in that it comprises an operation button for receiving a command to increase or decrease the set temperature.
The method according to claim 1,
A start detection unit 260 that detects whether the vehicle is started (ON) or off (OFF);
The output duty ratio control system further comprising a.
The method according to claim 3,
The control unit 250 is characterized in that when the start of the vehicle is on (ON), the operation of the air conditioner (Air Conditioner) is on (ON), the set temperature is input through the input operation unit 220 Output duty ratio control system.
The method according to claim 1,
The duty ratio storage unit 230, the output duty ratio control system, characterized in that for storing the value determined by tuning (Tunning) for each vehicle type for the output duty ratio corresponding to the set temperature.
delete Set temperature of the air conditioning system including the temperature detection unit 210, the input operation unit 220, the duty ratio storage unit 230, the ECV driving unit 240, the control unit 250, the start detection unit 260, and the display unit 270 As a method of controlling the output duty ratio according to the change,
(a) displaying the current temperature detected through the temperature detector 210 through the display unit 270;
(b) receiving a set temperature for the current temperature through the input manipulation unit 220;
(c) selecting an output duty ratio corresponding to the input set temperature from the duty ratio storage unit 230;
(d) transmitting the selected output duty ratio to the ECV driver 240; And
(e) the ECV driving unit 240 performing an opening / closing operation of the expansion valve according to the output duty ratio;
Including,
The output duty ratio includes a first output duty ratio (A) and a second output duty ratio (B),
The step of selecting the output duty ratio,
The second output duty ratio (B) for increasing the temperature at 0 ° C is adjusted to be greater than the first output duty ratio (A), and the first output duty ratio (A) and the second at 20 ° C outside temperature. The output duty ratio (B) is controlled to be the same, and the output duty ratio control method according to the change of the set temperature, characterized in that only the first output duty ratio (A) is adjusted for temperature drop at an ambient temperature of 40 ° C.
The method according to claim 7,
In step (b), the output duty ratio control method according to the change in the set temperature, characterized in that the input temperature is raised or lowered through the input manipulation unit 220.
The method according to claim 8,
The rising or falling width is determined by the amount of change of the set temperature input through the input manipulation unit 220 and the outside temperature detected through the temperature detection unit 210. .
The method according to claim 7,
The step (b) is characterized in that when the start of the vehicle is in the ON state and the operation of the air conditioner is in the ON state, the set temperature is input through the input manipulation unit 220. Output duty ratio control method according to change of set temperature.
The method according to claim 7,
In step (c), the output duty ratio control method according to the set temperature change, characterized in that the output duty ratio corresponding to the set temperature is determined by tuning (Tunning) for each vehicle type.
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