KR101669986B1 - System and method for controlling intake of inner air and outer air with fuction of preventing fogging - Google Patents

Abstract

FIELD OF THE INVENTION The present invention relates to a system and method for controlling indoor and outdoor inhalation volume for preventing fogging.
The present invention relates to an air conditioning system, comprising: a controller for receiving air conditioning conditions from a user; A cooling water temperature sensor for sensing the temperature of the cooling water flowing into the heater core provided in the air conditioner; a temperature sensor for detecting the temperature of the air passing through the heater core; A sensor unit including a discharge-on sensor and a vehicle speed sensor for sensing the speed of the vehicle; A blower motor for driving a blower provided in the air conditioner; and a door actuator provided inside the air conditioner for driving a door for adjusting the amount of inward and outward suction; And an operation unit for determining whether the air conditioning condition transmitted from the controller and the values transmitted from the sensor unit satisfy an entry condition to the partial trap inflow mode and a memory for storing reference values used in determining the entry condition Wherein the entry condition is that the value transmitted from the cooling water ON is equal to or greater than the first reference cooling water temperature and equal to or less than the second reference cooling water temperature and that the value transmitted from the discharge temperature sensor is equal to or higher than the reference discharge temperature And the memory stores the first reference coolant temperature, the second reference coolant temperature, and the reference discharge temperature.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a system and method for controlling intake and exhaust of an internal and external fuel,

The present invention relates to a system and method for controlling the intake and exhaust of an internal and external air, and more particularly, to a system and method for controlling an intake and exhaust of a vehicle, The present invention relates to a system and method for controlling the intake and exhaust of an indoor or outdoor unit, which partially inflows indoor air into an air-conditioning unit (HVAC) for rapid heating of a vehicle interior.

Generally, air conditioning systems are installed in automobiles. The air conditioning system includes a cooling system for cooling the vehicle (indoor), a heating system for heating the vehicle, and an air conditioning system for adjusting the temperature, intensity, and direction of the air supplied to the vehicle according to the air conditioning conditions set by the user (HVAC: Heating, Ventilating and Air Conditioning).

The air conditioning apparatus 10 generally includes a heater / evaporator unit 12 and a blower unit 14 coupled to the heater / evaporator unit 12, as shown in FIG. The heater / evaporator unit 12 includes an evaporator core of the cooling system, a heater core of the heating system, and a plurality of doors for adjusting the temperature, intensity and direction of air passing through the evaporator core and / lt; / RTI >

The blower unit 14 is for controlling the amount of the inside air (air in the passenger compartment) and the outside air (air outside the passenger compartment) flowing into the inside of the heater / evaporator unit 12, A blower for supplying air to the core and / or the heater core, an outside air inlet and an inside air inlet formed in the case, and a door for opening and closing the outside air inlet and the inside air inlet.

On the other hand, a controller (not shown) is mounted on the center facia panel in front of the driver's seat of the vehicle so that the user can input air conditioning conditions. When the user selects the bet mode by operating the controller, the inflow inlet of the blower unit 14 is fully opened and the outside air inlet of the blower unit 14 is completely closed. Therefore, when the bet mode is selected, only the indoor air flows into the heater / evaporator unit 12 of the air conditioner 10. On the other hand, when the user selects the outside air mode, the inflow inlet of the blower unit 14 is completely closed and the outside air inlet of the blower unit 14 is completely opened. Therefore, when the outside air mode is selected, only the outside air flows into the heater / evaporator unit 12 of the air conditioner 10.

However, recently, in spite of the fact that the user has selected the outside air mode, the inside / outside air suction amount control method of partially entering the inside air into the heater / evaporator unit 12 of the air conditioner 10 is applied for rapid heating of the passenger compartment. Hereinafter, a conventional internal / external suction amount control method will be described with reference to Figs. 1 and 2. Fig.

The conventional internal / external suction amount control method is performed after the automobile starts up and the user enters the air conditioning conditions through the controller. As shown in FIG. 2, the first to the seventh steps (S70 to S70) .

In the first step S10, the microcomputer, which is one component of the FATC (Full Automatic Temperature Control), determines whether the operation signal of the blower provided in the blower unit 12 of the air conditioner 10 is input from the user . When the operating signal of the blower is inputted from the user, the microcomputer determines whether the inside / outside mode input from the user in the second step S20 is in the outside air mode. When the outside air mode is input from the user, the microcomputer determines whether the set temperature input from the user in the third step S30 is equal to or higher than the reference set temperature. If the user has input a set temperature equal to or higher than the reference set temperature, the microcomputer determines whether the coolant temperature is equal to or lower than the reference coolant temperature in a fourth step S40. Herein, the cooling water refers to water flowing into the engine via the heater core provided in the heater / evaporator unit 12 of the air conditioner 10 after receiving heat from the engine, Quot; means the temperature of the cooling water flowing into the < / RTI >

If the cooling water temperature is below the reference cooling water temperature, the microcomputer determines whether the outside air temperature is lower than the reference ambient temperature in a fifth step S50. If the outside air temperature is lower than the reference outside air temperature, the microcomputer determines whether the vehicle speed is equal to or lower than a reference vehicle speed in a sixth step S60. If the vehicle speed is not higher than the reference vehicle speed, the microcomputer enters the partial inflow inflow mode (S70). The microcomputer which has entered the partial inflow inflow mode drives the door provided in the blower unit 14 to partially open the inflow inlet even though the user sets the outside air mode.

According to the internal / external suction amount control method, since a relatively high temperature air is supplied to the passenger compartment after passing through the heater core under a certain condition in spite of the user selecting the outside air mode, heating of the passenger compartment can be performed quickly have. However, since the stool is relatively humid as compared with the outside air, the fogging (a phenomenon that the automobile glass gets wet) occurs in the glass of the automobile according to the control method of the inside and outside aspiration amount.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the conventional problems as described above, and it is an object of the present invention to provide an air conditioner for a vehicle, which not only satisfies conventional conditions for performing a partial inflow inflow mode but also satisfies a fogging prevention condition, And to provide a system and method for controlling the intake and exhaust of the inside and outside of the apparatus.

According to an aspect of the present invention, there is provided an air conditioner comprising: a controller for receiving air conditioning conditions from a user; A cooling water temperature sensor for sensing the temperature of the cooling water flowing into the heater core provided in the air conditioner; a temperature sensor for detecting the temperature of the air passing through the heater core; A sensor unit including a discharge-on sensor and a vehicle speed sensor for sensing the speed of the vehicle; A blower motor for driving a blower provided in the air conditioner; and a door actuator provided inside the air conditioner for driving a door for adjusting the amount of inward and outward suction; And an operation unit for determining whether the air conditioning condition transmitted from the controller and the values transmitted from the sensor unit satisfy an entry condition to the partial trap inflow mode and a memory for storing reference values used in determining the entry condition Wherein the entry condition is that the value transmitted from the cooling water ON is equal to or greater than the first reference cooling water temperature and equal to or less than the second reference cooling water temperature and that the value transmitted from the discharge temperature sensor is equal to or greater than the reference discharge temperature And the memory stores the first reference coolant temperature, the second reference coolant temperature, and the reference discharge temperature.

Preferably, the entry condition includes that the number of blowers included in the air conditioning condition is not less than the reference number when the value transmitted from the vehicle speed sensor exceeds the reference vehicle speed. At this time, the memory stores the reference vehicle speed and the reference number.

The present invention relates to an in-and-outsidal suction amount control method for preventing fogging, which is performed by a microcomputer of a fully automatic temperature controller in a state in which an automobile starts up and an air conditioning condition is input by a user, comprising: (A) Determining whether the operation signal is included in the air conditioning condition; (B) determining whether the microcomputer determines whether a signal for setting the inside / outside mode to the outside air mode is included in the air conditioning condition; (C) determining whether the set temperature included in the air conditioning condition is equal to or higher than a reference set temperature; (D) determining whether the temperature of the cooling water flowing into the heater core provided in the air conditioner is equal to or higher than a first reference cooling water temperature and lower than a second reference cooling water temperature; (E) determining by the microcomputer whether the temperature of the air passing through the heater core is equal to or higher than a reference discharge temperature; (F) determining by the microcomputer whether the temperature of air outside the automobile is below a reference ambient temperature; (G) determining by the microcomputer whether the speed of the automobile is below a reference vehicle speed; And (H) when the conditions in the steps (A) to (G) are all satisfied, the microcomputer enters the air conditioner state of the automobile into the partial air inflow mode.

Preferably, when it is determined in the step (G) that the speed of the automobile has exceeded the reference vehicle speed, the microcomputer enters the air conditioning state into the partial inflow mode only when the number of blowers included in the air- .

According to the present invention, not only the condition for performing the partial inflow inflow mode but also the fogging prevention condition is satisfied, the air conditioning condition of the automobile enters the partial inflow inflow mode. Therefore, the car is quickly heated and fog does not occur on the glass of the automobile.

1 is a perspective view showing an example of a general air conditioner (HVAC).
2 is a flowchart showing a method of controlling the internal and external suction amounts according to the related art.
FIG. 3 is a block diagram showing an in-and-out-suction intake amount control system for preventing fogging according to the present invention.
4 is a flowchart showing an inhalation volume control method for preventing fogging according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a system and method for controlling indoor and outdoor inhalation amount for preventing fogging according to the present invention will be described in detail with reference to FIG. 1, FIG. 3 and FIG. It is to be understood that the terminology or words used herein are not to be construed in an ordinary sense or a dictionary, and that the inventor can properly define the concept of a term to describe its invention in the best possible way And should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

3, the internal and external inhalation amount control system 100 for preventing fogging according to the present invention includes a microcomputer 110, a sensor unit, a driving unit, and a controller 180 as shown in FIG.

The controller 180 is mounted on a center facia panel in front of the driver's seat of a vehicle and is provided for receiving air conditioning conditions from a user. The user can operate the controller 180 to input air conditioning conditions such as the on / off state of the blower, the number of blower stages, the set temperature inside the vehicle interior, and the inside / outside mode. The controller 180 transmits the air conditioning condition input from the user to the operation unit 112 of the microcomputer 110.

The driving unit includes a door actuator 160 and a blower motor 170. The door actuator 160 receives a control signal from the operation unit 112 of the microcomputer 110 and drives a door provided in the blower unit 14. [ The blower unit 14 is coupled to a heater / evaporator unit 12 of a heating, ventilating and air conditioning (HVAC) 10 as previously described in the background. The blower motor 170 receives a control signal from the operation unit 112 and drives the blower accommodated in the blower unit 14 of the air conditioner 10. [

The sensor unit includes an outside temperature sensor 120, a cooling water temperature sensor 130, a vehicle speed sensor 140, and a discharge temperature sensor 150. The outdoor temperature sensor 120 senses the temperature of the air (outside air) located outside the automobile and transmits the sensed temperature to the operation unit 112. The cooling water temperature sensor 130 senses the temperature of the cooling water flowing into the heater core provided in the heater / evaporator unit 12 of the air conditioner 10 and transmits the temperature to the operation unit 112. The vehicle speed sensor 140 senses the speed of the vehicle and transmits it to the operation unit 112. The discharge-on-sensor 150 senses the temperature of the air passing through the heater core, and transmits the sensed temperature to the arithmetic unit 112.

The microcomputer 110 is a component of a full automatic temperature control (FATC), and includes an operation unit 112 and a memory 114. The calculation unit 112 determines whether the air conditioning conditions transmitted from the controller 180 and the values transmitted from the sensor unit satisfy the entry condition for entering the partial wake inflow mode. The memory 114 stores reference values (a reference set temperature, a first reference coolant temperature, a second reference coolant temperature, a reference discharge temperature, a reference outside air temperature, a reference vehicle speed, and a reference number) necessary for determining the entry condition.

The operation of the operation unit 112 for determining the entry condition and the method of using the reference values in this process will be clearly understood by the following method of controlling the inside and outside of the body for preventing fogging.

The indoor / outdoor suction amount control method for preventing fogging according to the present invention, which is implemented through the above-described indoor / outdoor suction amount control system 100, is performed after the start of the vehicle is started and the user inputs air conditioning conditions through the controller 180, (S110) to a ninth step (S190) as shown in FIG.

In the first step S110, the operation unit 112 determines whether the air conditioner condition transmitted from the controller 180 includes a blower operation signal. The blower is provided in the blower unit 14 of the air conditioner 10.

If the air conditioning condition includes the blower operation signal, the operation unit 112 transmits the blower operation signal to the blower motor 170 and performs the second step (S120). The blower motor 170, which receives the blower operation signal, operates the blower provided in the blower unit 14. In the second step S120, the computing unit 112 determines whether or not a signal for setting the inside / outside mode to the outside air mode is included in the air conditioning condition transmitted from the controller 180. [ The operation unit 112 transmits the signal to the door actuator 160 and the door actuator 160 drives the doors of the blower unit 14 to completely close the outside air inlet At the same time, the inlet opening is completely opened. On the other hand, when the indoor / outdoor mode is in the outdoor mode, the operation unit 112 transmits the corresponding signal to the door actuator 160, and the door actuator 160 drives the door provided in the blower unit 14 to completely open the outdoor air inlet At the same time, completely close the air inlet. When the indoor / outdoor mode is in the outdoor mode, the operation unit 112 performs the third step (S130).

In the third step S130, the arithmetic unit 112 compares the reference temperature set in the air conditioning condition transmitted from the controller 180 (the in-vehicle target temperature set by the user by operating the controller) It is determined whether or not the temperature is equal to or higher than the temperature If this condition is not satisfied, the operation unit 112 maintains the outdoor air mode in the current air conditioning state, and if it is satisfied, performs the fourth step (S140). For example, if the set temperature transmitted from the controller 180 is 25 degrees in the state that the reference set temperature is 30 degrees, the calculating unit 112 maintains the outside air mode, but if the set temperature is 30 degrees or more, (S140).

In operation S140, the operation unit 112 determines whether the temperature of the cooling water flowing into the heater core is equal to or higher than the first reference cooling water temperature read from the memory 114 and equal to or lower than the second reference cooling water temperature. If this condition is not satisfied, the operation unit 112 maintains the current air conditioning state (outdoor air mode), and if it is satisfied, performs the fifth step (S150). For example, if the temperature of the cooling water is 30 degrees or 70 degrees in a state where the first reference cooling water temperature and the second reference cooling water temperature are 40 degrees and 60 degrees, respectively, the calculating unit 112 maintains the outside air mode, The back side computing unit 112 performs the fifth step S150.

Conventionally, when the temperature of the cooling water is below the second reference cooling water temperature, the air conditioning state enters the partial inflow mode. In such a case, the fog occurred on the glass of the automobile due to the repeated cycling of the wet stakes. However, in the present invention, when the temperature of the cooling water is less than the first reference cooling water temperature, the air conditioning state does not enter the partial inflow mode. In such a case, only the dry outside air flows into the passenger compartment, so that no fog occurs on the automobile glass. According to the present invention, when the cooling water temperature is equal to or higher than the first reference cooling water temperature, the air conditioner enters the partial inflow mode. In this case, the temperature in the passenger compartment has already reached a temperature at which fogging can be prevented. The fog does not occur in the glass of FIG.

The first reference coolant temperature and the second reference coolant temperature introduced with the intention described above can be determined by the prior test and can be set differently for each vehicle type.

In operation S 150, the operation unit 112 determines whether the temperature (discharge temperature) of the air passing through the heater core is equal to or greater than a reference discharge temperature read from the memory 114. When this condition is not satisfied, the operation unit 112 maintains the current air conditioning state (outdoor mode), and if it is satisfied, performs the sixth step (S160). For example, when the reference discharge temperature is 25 degrees and the discharge temperature is 20 degrees, the calculating unit 112 maintains the outside air mode, but if the discharge temperature is 40 degrees, the calculating unit 112 performs the sixth step (S160).

In the present invention, when the temperature of the cooling water exceeds the first reference cooling water temperature but the discharge temperature is lower than the reference discharge temperature, it is determined that the temperature in the vehicle room has not reached the temperature at which fogging can be prevented The air conditioning state is not entered into the partial exhaust introduction mode. The standard discharge temperature introduced with such an intention can be determined by a preliminary test and can be set differently for each vehicle type.

In operation S660, the operation unit 112 determines whether the temperature of the outside air is lower than or equal to a reference ambient temperature read from the memory 114. [ The operation unit 112 maintains the current air conditioning state (outdoor mode) when this condition is not satisfied, and performs the seventh step (S170) when it is satisfied. For example, if the outside air temperature is 5 degrees and the outside air temperature is 10 degrees, the calculating unit 112 maintains the outside air mode. If the outside air temperature is 0, the calculating unit 112 performs the seventh step (S170). If the outside temperature is high, heating of the vehicle can be performed quickly even if the partial inflow mode is not used, and this condition is included in the entry condition to the partial inflow mode.

The reference ambient temperature may be determined by a preliminary test, and may be set differently for each vehicle type.

In operation S770, the operation unit 112 determines whether the vehicle speed (vehicle speed) is equal to or less than a reference vehicle speed read from the memory 114. [ The operation unit 112 performs the eighth step (S180) when the condition is not satisfied, and the ninth step (S190) when the condition is satisfied. For example, when the reference vehicle speed is 50 km / h and the vehicle speed is 40 km / h, the operation unit 112 performs the ninth step S190. If the vehicle speed is 70 km / h, the operation unit 112 performs the eighth step S180 .

When the partial inflow inflow mode is adopted in a state where the vehicle speed is too high, a part of the outside air passing through the outside air inflow port and flowing into the blower unit 14 can not enter the heater / evaporator unit 12, Can be introduced. Since the outside air passing through the air inlet and flowing directly into the vehicle is cold air that has not passed through the heater core, the heating speed of the vehicle becomes rather slow. Therefore, when the vehicle speed is excessively high, it is advantageous for rapid heating of the passenger compartment by completely sealing the inflow port.

The reference vehicle speed can be determined by a preliminary test, and can be set differently for each vehicle type.

The operation unit 112 determines whether the number of blower stages included in the air conditioning condition transmitted from the controller 180 is equal to or greater than the reference blower stage read from the memory 114 in operation S80. When this condition is not satisfied, the operation unit 112 maintains the current air conditioning state (outdoor mode), and if it is satisfied, performs the ninth step (S190). For example, if the number of stages of the reference blower is three, and the number of stages of the blower is two, the operation unit 112 maintains the open mode, and if the number of stages of the blower is four, the operation unit 112 performs the ninth step (S190).

When the partial inflow inflow mode is adopted in a state where the vehicle speed is high, as described above, a part of the outside air passing through the inflow inlet and flowing into the blower unit 14 can be directly introduced into the vehicle through the inflow inlet. However, even in such a state, when the blower number is high, all the outside air that has passed through the outside air inlet port due to the strong suction force of the blower and passed into the blower unit 14 passes through the blower, and then passes through the heater core. Therefore, even if the vehicle speed is high, if the blower stage number is larger than the reference blower stage, the partial exhaust inflow mode is adopted, which is advantageous for rapid heating of the vehicle.

The reference blower stage number may be determined by a preliminary test, and may be set differently for each vehicle type.

In a ninth step (S190), the operation unit 112 enters the air conditioner state of the vehicle into the partial air inflow mode. In this case, the operation unit 112 transmits the control signal to the door actuator 160, and the door actuator 160 operates the door provided in the blower unit 14 to partially open the air inlet, . Meanwhile, the calculation unit 112 can be included in the control signal by setting the degree of airtightness of the outside air inlet and the degree of opening of the inside air inlet different for each blower stage.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that the invention may be variously varied and modified within the scope of the appended claims.

100: Inhalation volume control system for preventing fogging
110: Microcomputer 112: Operation unit
114: Memory 120: Outside temperature sensor
130: coolant temperature sensor 140: vehicle speed sensor
150: Discharge-on sensor 160: Door actuator
170: blower motor 180: controller

Claims (4)

A controller for receiving air conditioning conditions from a user;
A cooling water temperature sensor for sensing the temperature of the cooling water flowing into the heater core provided in the air conditioner; a temperature sensor for detecting the temperature of the air passing through the heater core; A sensor unit including a discharge-on sensor and a vehicle speed sensor for sensing the speed of the vehicle;
A blower motor for driving a blower provided in the air conditioner; and a door actuator provided inside the air conditioner for driving a door for adjusting the amount of inward and outward suction; And
An operation unit for determining whether the air conditioning condition transmitted from the controller and the values transmitted from the sensor unit satisfy an entry condition for entering the partial trap inflow mode, and a memory for storing reference values used in determining the entry condition A microcomputer,
Wherein the entry condition includes a condition that a value transmitted from the cooling water temperature sensor is equal to or greater than a first reference cooling water temperature and equal to or lower than a second reference cooling water temperature and a condition that a value transmitted from the discharge temperature sensor is equal to or greater than a reference discharge temperature Wherein the memory stores the first reference coolant temperature, the second reference coolant temperature, and the reference discharge temperature. The method according to claim 1,
Wherein the entry condition further satisfies a condition that the number of blowers included in the air conditioning condition is equal to or greater than a reference number when the value transmitted from the vehicle speed sensor exceeds a reference vehicle speed, Wherein the control unit is configured to control the internal / external suction amount control system. A method for controlling indoor and outdoor inhalation amount for preventing fogging, which is performed by a microcomputer of a fully automatic temperature controller in a state that a vehicle starts up and an air conditioning condition is inputted by a user,
(A) determining whether the operating signal of the blower provided in the air conditioner is included in the air conditioning condition;
(B) determining whether the microcomputer determines whether a signal for setting the inside / outside mode to the outside air mode is included in the air conditioning condition;
(C) determining whether the set temperature included in the air conditioning condition is equal to or higher than a reference set temperature;
(D) determining whether the temperature of the cooling water flowing into the heater core provided in the air conditioner is equal to or higher than a first reference cooling water temperature and lower than a second reference cooling water temperature;
(E) determining by the microcomputer whether the temperature of the air passing through the heater core is equal to or higher than a reference discharge temperature;
(F) determining by the microcomputer whether the temperature of air outside the automobile is below a reference ambient temperature;
(G) determining by the microcomputer whether the speed of the automobile is below a reference vehicle speed; And
(H) entering the partial air inflow mode of the automobile when the conditions of the steps (A) to (G) are all satisfied; and A method of controlling an aspiration amount. The method of claim 3,
If it is determined in the step (G) that the speed of the automobile exceeds the reference vehicle speed, the microcomputer may enter the air conditioner state into the partial air inflow mode only when the number of blowers included in the air condition condition is equal to or greater than the reference number of steps Wherein the inhalation volume control method comprises:

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