KR20210136730A - Temperature door control method of Air-conditioning system for vehicle - Google Patents

Abstract

The present invention relates to a method of controlling a temp door of a vehicle air conditioning system. More specifically, in order to control an interior temperature of a vehicle by controlling an opening degree of a temp door so as to control a mixture amount of air having passed through an evaporator and air having passed through a heater core, the method of controlling a temp door of a vehicle air conditioning system sequentially includes: a first step of sensing the temperature of outside air using an outside air temperature sensor; and a second step of controlling the temp door through a control part. The second step includes sequentially comprises: a step A of determining cooling and heating loads using the sensed outside air temperature value; and a step B of controlling an opening range of the temp door in accordance with the determination. The step B is constituted to variably control a position of the temp door in accordance with a set temperature value, in accordance with the cooling and heating load conditions.

Description

Temperature door control method of Air-conditioning system for vehicle

The present invention relates to a method for controlling a temp door of an air conditioning system for a vehicle, and more particularly, to control the opening degree of a temp door for each condition of heating and cooling load in an air conditioning system for a vehicle having a manual type temperature control device. .

In general, the vehicle air conditioner is a vehicle interior product installed for the purpose of cooling and heating the interior of a vehicle in summer or winter, or removing frost from the windshield during rain or winter, so that the driver's front and rear views can be secured. corresponds to

1 is a side view showing a conventional air conditioning system for a vehicle, and FIG. 2 corresponds to a flow chart showing a method for controlling a temp door of a conventional air conditioning system for a vehicle.

1 and 2, as can be seen, the vehicle air conditioner 10 is generally equipped with an evaporator (E) and a heater core (H) inside the air conditioning case at the same time, and after selectively introducing outside air or bet air, the evaporator E ) and the heat that has passed through the heater core (H) are adjusted by the opening degree of the temp door (1), and thereafter, various air conditioning modes (face mode, bi-level mode, floor mode, mix mode, defrost mode) ), air is blown into the vehicle interior through the outlet opened by the mode door 2 to cool, heat, or ventilate the vehicle.

Recently, with the trend of upgrading the air conditioning system, high-tech is being promoted to create a comfortable space inside the vehicle, and one of them is the Full Auto Temperature Control System (FATC). The fully automatic temperature control system is a device that automatically controls devices such as cooling, heating, and ventilation using a microcomputer programmed to make passengers feel comfortable. As a result, it is operated when the auto button is operated, and the blower motor, compressor, inner and outer air door actuators, temp door actuators, mode door actuators, etc. are feedback controlled according to the signal input from the sensor unit to perform the air conditioning mode at an appropriate temperature.

As such, the fully automatic temperature control system may be continuously maintained in an automatic control state or may be manually controlled by a driver directly manipulating various switches. However, if the driver manually controls the air conditioning mode in the automatic control state, that is, if the driver changes to the face mode while operating in the floor mode in winter, the hot air discharged to the feet is directly discharged to the driver's face, causing discomfort. or vice versa in summer. Therefore, to solve the above problems, Korean Patent Registration No. 10-1511507 (published on April 13, 2015) was devised.

The above technology, which corresponds to the prior art, is a first step of determining the manual control state and the automatic control state in a basic air conditioning system that adjusts the opening degree of the temp door so as to adjust the mixing amount of air that has passed through the evaporator and air that has passed through the heater core. And, in the case of manual control, the second step of detecting the outdoor temperature, the set temperature, and the air conditioning mode, the third step of calculating the target discharge temperature range using the detection value of the second step, the target discharge temperature range according to the calculation result and a fourth step of adjusting the opening degree of the temp door inside. In particular, the present invention, which will be described later, corresponds to a manual type. The manual type air conditioner has a configuration in which the door moves when the controller is moved by directly connecting the controller and the door with a cable. Also, as in the present invention, which will be described later, the actuator is moved by inputting a command to the controller without directly connecting it with a cable. There are also configurations. In the case of the manual type, the configuration of controlling the temp door according to the set temperature without calculating the target discharge temperature corresponds to the prior art.

As can be seen from FIG. 3 , in the case of manually controlling and adjusting the temperature in the prior art as described above, there is a problem in that there is a limit in the discharge of a desired temperature because there is a limitation in setting an interval of the temperature related to temperature control. It is impossible to finely divide and control the temperature in the setting of the temperature control unit. Therefore, the present invention has been devised to solve the above problems that have not been overcome in the prior invention.

Republic of Korea Patent Registration No. 10-1511507 (published on April 13, 2015)

Republic of Korea Patent Registration No. 10-1467263 (Announcement Date 2014.12.01.)

In order to solve the above problems, the present invention aims to solve the problem that the desired temperature cannot be discharged because there is a limitation in the temperature control setting according to the heating and cooling load, so that air of various discharge temperatures according to the driver's usage conditions can be discharged. .

The method for controlling a temp door of a manual vehicle air conditioning system according to the present invention is an outdoor temperature sensor to control the indoor temperature of the vehicle by adjusting the opening degree of the temp door so as to control the mixing amount of air passing through an evaporator and air passing through a heater core. A first step of detecting the outdoor temperature using , and step B of controlling the opening range of the temp door according to the determination, wherein step B is configured to variably control the position of the temp door according to a set temperature value according to the heating/cooling load condition.

In the above, step A of step 2 determines the heating/cooling load using the outdoor temperature, the set temperature, and the air conditioning mode.

In the above, the heating and cooling load of step A is determined using vehicle communication data.

In the above, the vehicle communication data includes a weather forecast or a date.

In the above, step B of step 2 further includes the step of classifying the heat load into cooling (Cooling), intermediate (Mild), and heating (Heating) steps by determining the heating and cooling load.

In the above, the method further includes the step of storing the temp door control mapping table for each step of Cooling, Mild, and Heating.

In the above, in the case of the cooling stage, the temp door is located at a position where the cooling passage is more open, and in the case of the middle stage, the temp door is located in a place where the opening degree of the cooling passage and the hot air passage are the same, and the heating In the case of the (Heating) step, it is controlled to be positioned at a position where the heating flow path is opened more.

In the above, between the first step and the second step, an additional step of determining whether the maximum cooling mode or the maximum heating mode is performed, and as a result of the determination of the additional step, if the maximum cooling mode or the maximum heating mode, the temp door is set to the maximum Proceed to the step of driving to the cooling position or the maximum heating position, otherwise proceed to the second step.

In the above, when the temp door is sequentially controlled from the maximum cooling mode to the maximum heating mode, the temp door divides the driving section more in the cooling step than in the heating step based on the mild step. so it is moved

Through the above problem solving means, the heating/cooling load information input unit is added to the configuration of the existing manual temperature control type air conditioner, and logic to determine the heating/cooling load condition is added to finely control the opening degree of the temp door for each condition. It is possible to discharge air at various temperatures according to the conditions of use.

Accordingly, when changing the air conditioning mode, it is possible to prevent the occupant's discomfort, such as suddenly becoming hot or cold due to a sudden change in the vehicle interior temperature, and to keep the interior of the vehicle comfortable.

1 is a side view showing a conventional vehicle air conditioner;
2 is a flowchart showing a conventional method for controlling a temp door of an air conditioning system for a vehicle;
3 is a chart showing the correlation between the conventional temperature control unit control and the position of the temp door;
4 is a flowchart schematically illustrating a method for controlling a temp door of an air conditioning system for a vehicle according to an embodiment of the present invention;
5 is a flowchart showing the driving principle of the control unit of FIG. 4;
6 is a flowchart specifically illustrating a method for controlling a temp door of an air conditioning system for a vehicle according to an embodiment of the present invention;
7 is a chart showing the correlation between the control of the summer temperature control unit and the position of the temp door;
8 is a diagram showing the correlation between the control of the spring/autumn temperature control unit and the position of the temp door;
9 is a diagram showing the correlation between the control of the temperature controller in winter and the position of the temp door.

Hereinafter, preferred embodiments according to the present invention will be described in detail by presenting more specifically with reference to the drawings. However, the following examples are provided so that those of ordinary skill in the art can fully understand the present invention, and may be modified in various other forms, and the present invention is not limited by the above examples. .

4 is a flowchart schematically showing a method for controlling a temp door of an air conditioning system for a vehicle according to an embodiment of the present invention, FIG. 5 is a flowchart illustrating a driving principle of the control unit of FIG. 4, and FIG. 6 is an embodiment of the present invention. It corresponds to a flowchart specifically showing a method for controlling a temp door of an air conditioning system for a vehicle according to the present invention.

In particular, as can be seen with reference to FIGS. 4 to 5 , the method for controlling the temp door of the air conditioning system for a vehicle according to the present invention has technical characteristics in the case of manual temperature control. ) is assumed as the default state.

A manual temp door control method of an air conditioning system for a vehicle is a method of manually adjusting a temperature control unit. Although there is a configuration in which the controller and the door are directly connected, as in the present invention, there is also a configuration in which the actuator is moved by inputting a command to the controller without directly connecting the cable. The first step of sensing the outside air temperature through the outside air temperature sensor so that the inside temperature of the vehicle can be controlled by adjusting the opening degree of the temp door to adjust the mixing amount of the air passing through the evaporator and the air passing through the heater core within a large range; , when the user sets the desired temperature through the temperature control unit, the control unit detects this and adjusts the opening degree of the temp door to reach the desired temperature by the user in sequence. Specifically, in the second step, several steps are sequentially implemented and implemented as follows.

In an embodiment of the present invention, the second step is comprised of a step A of determining the heating/cooling load including the outside air temperature sensed through an outside air temperature sensor, and a step B of controlling the opening range of the temp door according to the determination. The step is configured to variably control the position of the temp door according to the set temperature value according to the heating/cooling load condition.

In the case of detecting the outdoor temperature in the first step, it is common to use an outdoor temperature sensor, and in the second step, the outdoor air temperature detected by the outdoor temperature sensor, the set temperature, and the air conditioning mode are used to determine the heating and cooling load. The heating and cooling load of step A is characterized in that it is determined using vehicle communication data. Preferably, the vehicle communication data includes a weather forecast and today's date.

Next, in the case of step B, which determines the input heating/cooling load conditions, it is possible to classify the heat loads according to seasons such as spring, summer, autumn, and winter, or measured according to the temperature and climate at the time of cool, hot, and mild. Accordingly, step B may further include determining the heating and cooling load for each load condition and classifying the heat load into cooling, mild, and heating steps.

Due to the characteristics of step B of controlling the temp door, the temp door is controlled by using the temp door control mapping table for each cooling, mild, and heating step. Storing the temp door control mapping table for each step. The temperature range control using the mapping table as described above and the position of the temp door will be described in detail later.

6 is expanded and generalized to explain the concept of the above-described temp door control method in more detail, and a detailed description thereof is as follows.

First, after starting the vehicle, the first step (S10) in which the air conditioning system corresponding to the fully automatic temperature control system is formed in a manual control state is performed. In the case of manual control, in general, mode control - mode door / temperature control control - temp door / blower stage control - blower register is controlled. In the present invention, the temp door is controlled by inputting a command to the control unit to move the actuator. That is, the temp door is controlled according to the temperature control control position, that is, the set temperature, without separately calculating the target discharge temperature.

In particular, when the driver operates the temperature control switch to set the desired indoor temperature of the vehicle under manual control, data is input to the microcomputer by various sensors, and calculation is performed based on this to control the actuator, air conditioner compressor, blower motor, etc. By controlling, the vehicle interior temperature is maintained at the driver's desired temperature. It is a technical feature of the present invention to determine the heating/cooling load from seasonal weather, etc., and to differently control the opening degree displacement of the temp door according to the set temperature value. That is, even if the same set temperature is selected, the position of the temp door is different depending on the heating/cooling load.

As a result of the determination of the first step (S10), a step (S15) of determining whether the maximum cooling mode or the maximum heating mode may be additionally performed. If the determination result of step S15 corresponds to the maximum cooling mode or the maximum heating mode, the step of driving the temp door to the maximum cooling position or maximum heating position is performed.

In this case, when the temp door is sequentially controlled from the maximum cooling mode to the maximum heating mode, the temp door is driven in the cooling step rather than in the heating step based on the mild step. It is characterized by further dividing and moving.

Conversely, if it is not the maximum cooling mode or the maximum heating mode, the remaining step (S20) of detecting the outdoor temperature, the set temperature, and the air conditioning mode is performed. In the remaining step (S20), information on the heating and cooling load may be collected by using the outdoor temperature sensor, vehicle communication data (including weather forecast), and current weather as information.

After performing the remaining step (S20), using each detection value detected through the remaining step (S20), in the second step (S30), the information on the heating and cooling load collected before the calculation is input to determine the heating and cooling load conditions and sequentially controlling the opening degree of the temp door using a mapping table of the temp door configured in advance according to the above conditions.

Controlling the opening range of the temp door using the mapping table means that the position of the temp door can be controlled differently according to the position of the setting lever of the temperature control setting unit that the user directly manipulates. Because the temperature range mainly used for each weather is different (for example, in summer, cooling is mainly implemented, a more subdivided temperature control is required within the cooling range), so the setting lever of the temperature control Even if it is set, the temperature control can be finely adjusted so that the position of the temp door varies depending on the season and climate.

That is, in the mapping table, the subdivided temperature range section within the cooling range or the subdivided temperature range section within the heating range is configured in advance, and the air conditioning system determines the heating/cooling load condition according to the corresponding condition. One type of the pre-configured mapping table is selected. Of course, it is possible to perform calculations every time depending on the situation, but in order to promote efficiency, pre-input data is used.

In the second step (S30), the set temperature range is calculated to correspond to the size of the finally detected outdoor temperature, and based on this, the target set temperature range for each air conditioning mode may be differentially set.

In this way, the final step (S40) of controlling the opening degree of the temp door within the range set to correspond to each set temperature and air conditioning mode according to the result calculated using the mapping table of the second step (S40) is finally the present invention. The method for controlling the temp door of the air conditioning system for a vehicle according to the above is completed.

That is, since the set temperature range is calculated for each outdoor temperature and air conditioning mode in the second step (S30), the temp door opening amount for each set temperature and air conditioning mode is controlled to be limited to a value corresponding to the target discharge temperature range. Therefore, even if the user manually changes the air conditioning mode, it is possible to limit the upper and lower limits of the discharge temperature for each air conditioning mode. It is possible to discharge air at various discharge temperatures under various conditions.

Hereinafter, the correlation between the position of the temp door according to the control of the temperature controller according to the preset setting of the mapping table will be described.

7 is a diagram showing the correlation between the control of the temperature controller in summer and the position of the temp door, FIG. 8 is a diagram showing the correlation between the control of the temperature controller in spring/autumn and the position of the temp door, and FIG. 9 is the temperature control in winter. It corresponds to the diagram showing the correlation between the sub control and the position of the temp door.

In the case of the temperature control setting commonly shown in FIGS. 7 to 9, a lever directly operated by the user is expressed, and the black dot in the shape of a circle of the temperature control setting shows the position of the current lever. It can be rotated 180° from the left end of the arc gauge, the innermost circle, as the starting point, and the more you turn the lever from left to right, the more it switches from cooling to heating mode. Therefore, the cut-off middle part of the arc gauge becomes the intermediate point and temperature between the cooling and heating modes.

Briefly described, the temp door is positioned at a position that opens the cooling flow path more in the cooling step, and in the middle step, the temp door has the same size of opening between the cooling flow path and the hot air flow path. It is located in the same place, and in the case of the heating step, it is a technical feature to control the heating flow path to be positioned at a more open position.

As can be seen in more detail with reference to FIG. 7, the temperature control setting and the position of the temp door can be confirmed according to the mapping table in summer and when the temperature is high and humid. It can be seen that the discharge temperature changes abruptly as the discharge temperature is relatively low compared to the mapping table and the lever is moved to the heating mode. Specifically, in the summer when cooling is the main purpose and required, the main use temperature range of the user of the air conditioning system corresponds to the cooling temperature, so the section within the cooling temperature range is further subdivided according to the temperature control setting. Therefore, in the section within the cooling temperature range, the temp door is relatively more subdivided and moved according to the control of the temperature control lever than in the section within the heating temperature range. In other words, the range of opening degree is further subdivided within the cooling temperature range, so that it is possible to control the discharge temperature that best meets the needs of the user.

As can be seen from FIG. 8 , the temperature control setting and the position of the temp door can be checked according to the mapping table in the spring/autumn season and the time corresponding to a mild climate in terms of weather. Since the selection of the intermediate temperature is the most frequent from the user's point of view, and the cooling or heating is also to some extent frequent, the sections within the overall temperature range are uniformly subdivided. Therefore, it can be interpreted that the temp door is uniformly subdivided and moved according to the movement of the temperature control lever within the overall temperature range.

As can be seen from FIG. 9 , the temperature control setting and the location of the door can be checked according to the mapping table in winter, when the weather is cold and dry, and the temperature control lever is located in the central part. It can be seen that the discharge temperature is relatively high compared to other mapping tables, and the discharge temperature changes gradually as the lever moves to the heating mode. It can be seen that the slope is steep.)

Specifically, since the main use temperature range of the user of the air conditioning system corresponds to the heating temperature in winter when heating is the main purpose and required, the section within the heating temperature range is further subdivided according to the temperature control setting. Therefore, in the section within the heating temperature range, the temp door is relatively more subdivided and moved according to the control of the temperature control lever than in the section within the cooling temperature range. In other words, the range of opening degree is further subdivided within the heating temperature range, so that it is possible to control the discharge temperature that best meets the needs of the user.

Above, the present invention has been described in detail with reference to preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications can be made by those skilled in the art within the scope of the technical spirit of the present invention. This is possible.

Claims (9)

To control the interior temperature of the vehicle by adjusting the opening degree of the temp door to control the mixing amount of the air that has passed through the evaporator and the air that has passed through the heater core.
A first step of sensing an outdoor temperature using an outdoor temperature sensor;
A method for controlling a temp door of a manual vehicle air conditioning system comprising sequentially a second step of controlling the temp door through a control unit, the method comprising:
The second step is a step A of determining the heating and cooling load using the sensed outdoor temperature value;
and step B of controlling the opening degree range of the temp door according to the determination.
Step B is a method for controlling a temp door of an air conditioning system for a vehicle, characterized in that it is configured to variably control the position of the temp door according to a set temperature value according to the heating/cooling load condition. According to claim 1,
Step A of the second step is a temp door control method of an air conditioning system for a vehicle, characterized in that determining the heating and cooling load using the outdoor temperature, the set temperature, and the air conditioning mode. 3. The method of claim 2,
A method for controlling a temp door of an air conditioning system for a vehicle, characterized in that the heating and cooling load of the step A is determined using vehicle communication data. 4. The method of claim 3,
The vehicle communication data is a temp door control method of an air conditioning system for a vehicle, characterized in that it includes a weather forecast or a date. 5. The method according to any one of claims 1 to 4,
Step B of the second step further comprises the step of classifying the heat load into cooling (Cooling), intermediate (Mild), and heating (Heating) steps by determining the heating and cooling load. 6. The method of claim 5,
Temp door control method for a vehicle air conditioning system, characterized in that it further comprises the step of storing the temp door control mapping table (Mapping Table) for each of the cooling (Cooling), the intermediate (Mild), and the heating (Heating) step. 7. The method of claim 6,
In the case of the cooling step, the temp door is positioned at a position where the cooling flow path is more open, and in the middle step, the temp door is positioned where the size of the opening degree of the cooling flow path and the hot air flow path is the same, In the case of the heating step, a method for controlling a temp door of an air conditioning system for a vehicle, characterized in that controlling the heating flow path to be positioned at a position in which more openings are made. 7. The method of claim 6,
Between the first step and the second step, an additional step of determining whether the maximum cooling mode or the maximum heating mode is performed,
As a result of the determination of the additional step, if it is the maximum cooling mode or the maximum heating mode, the step of driving the temp door to the maximum cooling position or the maximum heating position is performed; otherwise, the second step is performed. Temp door control method. 9. The method of claim 8,
When the temp door is sequentially controlled from the maximum cooling mode to the maximum heating mode, the temp door operates a driving section in the cooling step rather than in the heating step based on the mild step. A method for controlling a temp door of an air conditioning system for a vehicle, characterized in that it is further divided and moved.

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