KR20160013310A - Air conditioning system for automotive vehicles - Google Patents

Abstract

The present invention relates to an air conditioner for a vehicle, and is configured to actively control the temperature of air discharged to a window glass side under an environmental condition in which a "condensation phenomenon" is highly likely to occur on an outer surface of a windowpane, And to prevent the "condensation phenomenon" on the outer side of the window glass caused by discharge.
In order to attain the above object, the present invention provides a heat exchanger comprising: a tempo door for controlling opening amount of a cold air passage and a warm air passage while rotating between a cold air passage and a warm air passage of an air conditioning case; The air conditioner of the present invention is characterized in that when the cold air is discharged from the defrost vent to the side of the window glass, it is determined whether or not condensation phenomenon may occur on the outer side of the windowpane corresponding to the defrost vent A window glass outside-side condensation occurrence determination means for determining a window glass exterior side condensation occurrence; And a control unit for preventing condensation on the outer surface of the windowpane using the air conditioner while entering the condensation prevention mode when it is determined that the windowpane outer-surface condensation occurrence determination means has a possibility of condensation on the outer surface of the windowpane.

Description

TECHNICAL FIELD [0001] The present invention relates to an air conditioning system for an automobile,

The present invention relates to an air conditioner for a vehicle and, more particularly, to an air conditioner for an automotive air conditioner which is configured to actively control the temperature of air discharged to the windowpane side in an environment condition in which a "condensation phenomenon" The present invention relates to a vehicle air conditioner capable of preventing a "condensation phenomenon" of an outer side surface of a window glass caused by low-temperature cold air discharge.

The automobile is provided with an air conditioner for cooling and heating the inside of the car. 1, the air conditioner case 1 is provided with a blower 3, an evaporator 5, a heater 7, a temp door, (8).

The blower 3 sucks the inside and outside air and blows the sucked inside and outside air to the inside passage 1a of the air conditioner case 1. [

The evaporator (5) cools the air blown from the blower (3) and supplies it to the passenger compartment. Therefore, the interior of the vehicle is cooled.

The heater (7) heats the air blown from the blower (3) and supplies it to the passenger compartment. Therefore, the car interior is heated.

The tempdoor 8 is provided at a branching point between the cold air passage 8a and the warm air passage 8b and rotates between the cold air passage 8a and the warm air passage 8b, (8b). Accordingly, the air flow rate to be supplied to the passenger compartment is controlled.

In addition, And a defrost door (9) provided in the air conditioning case (1).

The defrost door 9 adjusts the opening amount of the defrosting vent 9a in the "defrosting mode". Therefore, the air volume to be discharged in the direction of the window glass is controlled.

However, in such a conventional air conditioner, when the temperature of the air discharged to the window glass side is too low in the "defrost mode", for example, the tempo door 8 is controlled to the "maximum cooling position A" When all the cold air of the evaporator 5 is discharged to the window glass side, there is a disadvantage in that condensation phenomenon occurs on the outer side surface of the window glass side from which the cold air is discharged, and there is a problem that it is difficult to secure the driver's view due to such drawbacks.

Particularly, in an environmental condition in which the probability of occurrence of "condensation phenomenon" on the outer surface of the window glass is high, for example, when the humidity outside the car is high, Condensation phenomenon "occurs on the outer side of the window glass. In such a case, there is a problem that it is difficult to secure the visibility of the driver because of the" condensation phenomenon "on the outer side of the window glass. As a result,

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide an air conditioner which is capable of effectively and efficiently controlling the temperature of air discharged to a windowpane side in an environment condition in which a "condensation phenomenon " So that the "condensation phenomenon" on the outer surface of the windowpane due to the cold air discharge at a low temperature can be originally prevented.

It is another object of the present invention to provide a vehicular air conditioner capable of solving the "difficulty in securing visibility" of the driver due to the "condensation phenomenon" on the outer side of the windowpane, .

It is another object of the present invention to provide a vehicle air conditioner capable of solving the "difficulty in securing visibility" of the driver due to the "condensation phenomenon" on the outside of the windowpane, .

In order to achieve the above object, a vehicle air conditioning system according to the present invention comprises: a tempo door for controlling opening amount of the cold air passage and the warm air passage while rotating between a cold air passage and a warm air passage of an air conditioning case; And a defrost vent for discharging the conditioned air toward the side of the window glass, wherein when the cold air is discharged from the defrost vent to the window glass side, the outer surface of the window glass corresponding to the defrost vent A window glass outside condensation occurrence determination means for determining whether or not a condensation phenomenon is likely to occur; And a controller for preventing condensation on the outer surface of the windowpane using the air conditioner while entering the condensation prevention mode when the windowpane outer surface condensation occurrence determining means determines that there is a possibility of condensation on the outer surface of the windowpane, .

Preferably, the control unit controls the temperature of the air discharged to the window glass side when entering the dew condensation prevention mode to prevent condensation on the outer surface of the window glass.

The control unit controls the opening position of the tem- perature door relative to the cold air passage when entering the dew condensation prevention mode.

The control unit controls the blower to reduce the amount of air blown out to the window glass when the dew condensation prevention mode is entered.

The controller may be configured to lower the open upper limit value of the tempdoor to the predetermined upper limit value with respect to the cold air passage so that the opening amount of the cold air passage is not excessively opened beyond the predetermined opening amount when the dew condensation prevention mode is entered .

When the opening position of the tem- perature door to the cold air passage is controlled to exceed the upper limit value at the time of entering the dew condensation prevention mode, the control unit sets the opening position of the tem- perature door to the limit And the control is performed so as to be lower than the upper limit value.

And the control unit determines whether or not the window pane outer-surface condensation occurrence determining unit determines that the possibility of condensation has been eliminated on the outer surface of the windowpane in the state in which the window condensation prevention mode is entered, And the upper limit value of the opening degree of the tempdoor relative to the cold air passage is restored to its original state.

The outside surface condensation occurrence determining means includes a window glass side discharge air temperature sensor for sensing the temperature of the air discharged to the window glass side, an outdoor humidity sensor for detecting the humidity outside the car, an outside temperature sensor A vehicle speed sensor for detecting a running speed of the vehicle, and a vehicle speed sensor for detecting a speed of the vehicle based on a condition that the vehicle outdoor humidity input from the outdoor humidity sensor is equal to or higher than a reference humidity previously stored A condition that an outside air temperature input from the outside air temperature sensor is equal to or higher than an inside air temperature input from the inside air temperature sensor, a condition that a vehicle speed inputted from the vehicle speed sensor is less than a predetermined reference vehicle speed, The outdoor air temperature input from the weather sensor is equal to or higher than the window glass side discharge air temperature input from the window glass side air discharge temperature sensor It is determined that there is a possibility that a condensation phenomenon may occur on the outer surface of the windowpane. When any one of the above conditions is not satisfied, it is determined that there is no condensation on the outer surface of the windowpane, (Micom).

According to the automotive air conditioner of the present invention, since the structure for actively restricting the "open upper limit value" of the tempdoor to the cold air passage is provided on the outer surface of the windowpane under the condition that there is a risk of & It is possible to prevent excessive opening of the cold air passage when there is a risk of "condensation occurring ", and if there is a risk of" condensation "occurring on the outer surface of the windowpane, the temperature of the air discharged from the defrost vent to the windowpane side Is prevented from being too low.

In addition, when there is a risk of "condensation" on the outer surface of the windowpane, the structure prevents the temperature of air discharged to the windowpane from becoming too low. Therefore, the "condensation phenomenon" There is an effect that it can be prevented originally.

Also, since the "condensation phenomenon" on the outer side of the window glass can be prevented originally, there is an effect that the "visibility difficulty" of the driver due to the "condensation phenomenon" on the outer side of the window glass can be solved.

In addition, since it is possible to eliminate the "difficulty in ensuring visibility" of the driver due to the "condensation phenomenon" on the outer surface of the windowpane, it is possible to securely drive the driver.

1 is a view showing a conventional air conditioner for a vehicle,
2 is a view showing a configuration of a vehicle air conditioner according to the present invention,
3 is a flow chart showing an operation example of a vehicle air conditioner according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a vehicle air conditioner according to the present invention will be described in detail with reference to the accompanying drawings (the same components as those in the prior art are denoted by the same reference numerals).

First, a vehicle air conditioner according to the present invention will be briefly described with reference to FIG.

The air conditioning apparatus includes an air conditioning case 1 and a blower 3, an evaporator 5, a heater 7 and a tempo door 8 are provided in the air conditioning case 1.

The blower 3 sucks the inside and outside air and blows the sucked inside and outside air to the inside passage 1a of the air conditioner case 1. [

The evaporator (5) cools the air blown from the blower (3) and supplies it to the passenger compartment. The heater (7) heats the air blown from the blower (3) and supplies it to the passenger compartment.

The tempo door 8 controls the amount of opening of the cold air passage 8a and the warm air passage 8b while rotating between the cold air passage 8a and the warm air passage 8b. Accordingly, the air flow rate to be supplied to the passenger compartment is controlled.

In addition, And a defrost door (9) provided in the air conditioning case (1).

The defrost door 9 adjusts the opening amount of the defrosting vent 9a in the "defrosting mode". Therefore, the air volume to be discharged in the direction of the window glass is controlled.

Next, the features of the air conditioner for a vehicle according to the present invention will be described in detail with reference to FIG. 2 and FIG.

Referring first to Fig. 2, the air conditioner of the present invention includes a window glass outer side condensation occurrence determination means 10 for determining whether or not there is a possibility of occurrence of "condensation phenomenon " on the outer surface of the window glass.

The window glass outer side condensation occurrence determining means 10 includes a window glass side discharge air temperature sensor 12, an outdoor humidity sensor 14, an ambient temperature sensor 15, an indoor temperature sensor 16, A vehicle speed sensor 18, and a microcomputer 19.

The window glass side discharge air temperature sensor 12 is a temperature sensor provided on the side of the defrost vent 9a and detects the temperature of the air discharged from the defrost vent 9a to the window glass side, Quot; discharge air temperature data "to the microcomputer 19.

The outdoor humidity sensor 14 is a humidity sensor that is installed outside the vehicle. The outdoor humidity sensor 14 senses the humidity outside the vehicle, and then inputs the sensed "outdoor humidity data" to the microcomputer 19 described later.

The outside temperature sensor 15 is a temperature sensor provided outside the vehicle, and senses the outside temperature of the vehicle, and then inputs the sensed "outside temperature data" to the microcomputer 19 described later.

The indoor air temperature sensor 16 is a temperature sensor installed in the passenger compartment, and senses the temperature of the passenger compartment, and inputs the sensed "air temperature data" to the microcomputer 19 described later.

The vehicle speed sensor 18 senses the running speed of the vehicle and inputs the sensed "vehicle speed data" to the microcomputer 19 described later.

The microcomputer 19 receives a signal from the window glass side discharge air temperature sensor 12, the outdoor humidity sensor 14, the ambient temperature sensor 15, the inside air temperature sensor 16 and the vehicle speed sensor 18, Quot; reference data "and pre-stored " reference data " are input when the" outside air temperature data "," outside air temperature data "," outside air temperature data " A comparison process is performed to determine whether or not the condition is that there is a possibility of occurrence of "condensation phenomenon" on the outer surface of the windowpane.

In particular, whether or not the " outside humidity "input from the outdoor humidity sensor 14 is equal to or greater than the" reference humidity "stored in advance and the" outside temperature "input from the outside temperature detection sensor 15, And the "outside air temperature" input from the outside air temperature detection sensor 15 indicates whether or not the traveling speed of the vehicle inputted from the vehicle speed sensor 18 is equal to or smaller than a predetermined "reference vehicle speed" Or the "window glass side discharge air temperature" input from the window glass side discharge air temperature sensor 12.

At this time, when all of these conditions are satisfied, that is, when the "outside humidity" is equal to or higher than the "reference humidity", the "outside temperature" is equal to or higher than the " Is greater than or equal to the "window air temperature", the microcomputer 19 judges that there is a risk of "condensation" on the outer surface of the windowpane.

In accordance with this determination, the microcomputer 19 outputs the "window glass condensation occurrence signal S1". Specifically, a "window condensation occurrence signal S1" is outputted and inputted to the control section 20 to be described later.

Here, the microcomputer 19 outputs the "window glass condensation occurrence signal S1", and then the microcomputer 19 determines whether or not the vehicle outside humidity is less than the reference humidity or the outside air temperature is less than the inside temperature, If the running speed of the window glass exceeds the "reference vehicle speed" or the "outside temperature" is less than the "window glass side discharge air temperature ", the microcomputer 19 judges that there is no" According to this judgment, "window glass condensation occurrence signal S1" is erased (erased).

The air conditioner of the present invention includes a control unit (20).

The control unit 20 is equipped with a microprocessor. When the "window glass condensation occurrence signal S1" is inputted from the window glass outer-side condensation occurrence determination means 10, a "condensation phenomenon" And enters the "condensation prevention mode 22".

The controller 20, which has entered the "condensation prevention mode 22", controls the tempdoor 8 to control the temperature of the air discharged to the window glass side.

In particular, the "open upper limit value" of the tempdoor 8 with respect to the cold air passage 8a is limited to the predetermined size B so that the opening amount of the cold air passage 8a can not be excessively opened beyond the predetermined opening amount . Hereinafter, the "open upper limit value" having a predetermined size will be referred to as "upper limit value limit B ".

Therefore, the amount of cold air in the evaporator 5 flowing into the cold air passage 8a is limited. Thereby, the temperature of the air discharged from the defrost vent 9a to the window glass side is prevented from becoming too low. As a result, the "condensation phenomenon" on the outer side of the window glass due to the "cold discharge" at a low temperature is fundamentally prevented.

As a result, it is possible to eliminate the "difficulty in ensuring visibility" of the driver due to the "condensation phenomenon" on the outside of the windowpane, thereby enabling safe driving.

On the other hand, when the opening position of the tempdoor 8 with respect to the cold air passage 8a exceeds the upper limit upper limit B at the entry of the dew condensation prevention mode 22, When the tempo door 8 is controlled to the "maximum cooling position A ", for example, the opening position of the tempo door 8 is set to the" upper limit upper limit B " Respectively.

Accordingly, excessive opening of the cold air passage 8a is prevented, thereby preventing the air temperature discharged to the window glass side from becoming too low. As a result, the "condensation phenomenon" on the outer side of the window glass due to the "cold discharge" at a low temperature is fundamentally prevented.

2, the control unit 20 determines whether or not the "window glass condensation occurrence signal S1" input from the window glass outside condensation occurrence determination means 10 in the state of entering the "condensation prevention mode 22" Is erased, it is released from the "condensation prevention mode 22 ".

The control section 20 released from the "condensation prevention mode 22" returns the "open upper limit value" of the tempdoor 8 to the cold air passage 8a to the original state. Thus, the opening position of the tempdoor 8 can be controlled normally to the original state.

In the meantime, in the description and the drawings of the present invention, it is described that the microcomputer 19 of the window glass outer-side condensation occurrence determination means 10 for discriminating the "condensation phenomenon" on the outer side of the windowpane is configured separately from the control unit 20 However, the control unit 20 may simultaneously perform the role of the microcomputer 19 in some cases.

In this case, the control unit 20 is provided with a window glass side discharge air temperature sensor 12, an outdoor humidity sensor 14, an outside temperature sensor 15, an inside air temperature sensor 16, a vehicle speed sensor 18, To determine whether or not a "condensation phenomenon" on the outside of the window glass has occurred.

The control unit 20 of the present invention may control the blower 3 to control the amount of air to be blown toward the window glass when entering the dew condensation prevention mode 22. [ Particularly, it is possible to reduce the air flow amount discharged to the window glass side, thereby preventing condensation on the window glass exterior side.

Next, an operation example of the air conditioner having such a configuration will be described with reference to Figs. 2 and 3. Fig.

First, referring to Fig. 3, it is determined whether or not the condition is that there is a possibility of "condensation occurrence" (S103 to S109) in the state that the air conditioner is turned on (S101).

The judgment at this time is based on the condition (S103) that the " outside humidity "is equal to or higher than the " reference humidity" (S107) and the condition (S109) that the "outside air temperature" is equal to or higher than the "window glass side discharge air temperature" is satisfied.

If all of these conditions are satisfied, the control unit 20 determines that the "condensation phenomenon" is likely to occur on the outer surface of the windowpane and enters the "condensation prevention mode 22" (S111).

The control unit 20 that has entered the "condensation prevention mode 22" limits the "open upper limit value" of the tempdoor 8 to the cold air passage 8a to a preset "limit upper limit value B" (S113 ).

Then, the tempo door 8 is not controlled to be equal to or higher than the "upper limit value B ". Therefore, the cold air passage 8a is not opened excessively beyond the preset opening amount.

Thereby, the amount of cold air of the evaporator 5 flowing into the cold air passage 8a is limited. As a result, the temperature of air discharged to the window glass side through the defrost vent 9a is prevented from becoming too low. Thus, the "condensation phenomenon" on the outer side of the window glass due to the "cold discharge"

On the other hand, in the state of entering the "condensation prevention mode 22", it is continuously judged whether or not there is a possibility of "condensation" on the outer surface of the windowpane (S103 to S109).

At this time, when it is determined that the condition is not a condition of "condensation occurrence", that is, if the "outside outdoor humidity" is less than the "reference humidity" (S103-1), or the "outside air temperature" (S105-1) or when the running speed of the vehicle exceeds the "reference vehicle speed" (S107-1) and the "outside temperature" is less than the "window glass side discharge air temperature" (S109-1) Is released from the "condensation prevention mode 22" (S115).

The control unit 20 released from the "condensation prevention mode 22" returns the "open upper limit value" of the tempdoor 8 to the cold air passage 8a to the original state (S117). Then, the opening position of the tempdoor 8 is normally controlled in its original state.

According to the air conditioner of the present invention having such a constitution, the "open upper limit value" of the tempdoor 8 with respect to the cold air passage 8a is actively limited when there is a possibility of "condensation" on the outer surface of the windowpane It is possible to prevent the cold air passage 8a from being opened excessively when there is a risk of "condensation occurring" on the outer surface of the windowpane, and if there is a risk of "condensation" on the outer surface of the windowpane , The temperature of the air discharged from the defrost vent 9a to the window glass side is prevented from becoming too low.

In addition, when there is a risk of "condensation" on the outer surface of the windowpane, the structure prevents the temperature of air discharged to the windowpane from becoming too low. Therefore, the "condensation phenomenon" Can be prevented at the source.

Also, since the "condensation phenomenon" on the outer side of the window glass can be originally prevented, it is possible to solve the "difficulty in securing the view" of the driver due to the "condensation phenomenon" on the outer side of the window glass.

In addition, since it is possible to eliminate the "difficulty in securing visibility" of the driver due to the "condensation phenomenon" on the outer surface of the windowpane, it is possible to securely drive the driver.

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 embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

1: Air conditioning case (Case 3): Blower
5: Evaporator 7: Heater
8: Temp door 8a: Cold air passage
8b: Warm air passage 9: Defrost door
9a: Defrost Vent
10: Window condensation outside condensation occurrence determination means
12: Sensor for discharge air temperature on the window glass
14: outdoor humidity sensor 15: outdoor temperature sensor
16: temperature detection sensor 18: vehicle speed sensor
19: Micom 20: Control unit
22: Condensation prevention mode A: Maximum cooling position
B: upper limit

Claims (8)

A tempo door 8 for controlling opening amount of the cold air passage 8a and the warm air passage 8b while rotating between the cold air passage 8a and the warm air passage 8b of the air conditioning case 1, And a defrost vent (9a) for discharging the air whose temperature has been adjusted by the defroster vent (8) toward the window glass side,
A window glass outer surface condensation which determines whether or not condensation may occur in an outer surface portion of a windowpane corresponding to the deprost vent 9a when cool air is discharged from the deprovis vent 9a to the windowpane side, An occurrence determination means (10);
When determining that there is a risk of condensation on the outer surface of the windowpane, the windowpane outer-surface condensation occurrence determination means 10 enters the condensation prevention mode 22 and controls the condensation phenomenon on the outer surface of the windowpane And a control unit (20) for controlling the air conditioner. The method according to claim 1,
The control unit (20)
Wherein the controller controls the temperature of the air discharged to the window glass side when entering the dew condensation prevention mode (22) to prevent condensation on the outer surface of the window glass. 3. The method of claim 2,
The control unit (20)
And controls the opening position of the tem- perature door (8) with respect to the cold air passage (8a) when entering the dew condensation prevention mode (22). The method of claim 3,
The control unit (20)
And controls the blower (3) to reduce the amount of air blown out to the windowpane side when entering the dew condensation prevention mode (22). The method of claim 3,
The control unit (20)
The upper limit value of the opening degree of the temp door 8 with respect to the cold air passage 8a is set so as to prevent the opening amount of the cold air passage 8a from becoming excessively larger than the predetermined opening amount when the dew condensation prevention mode 22 is entered, To a predetermined upper limit value (B). 6. The method of claim 5,
The control unit (20)
When the opening position of the tempo door 8 with respect to the cold air passage 8a is already controlled in a state where the opening position exceeds the upper limit value B at the time of entering the dew condensation prevention mode 22, So as to lower the opening position of the tempo door (8) to the upper limit value (B) or less. The method according to claim 6,
The control unit (20)
The dew condensation prevention mode 22 is activated when the window pane outer surface condensation occurrence determination means 10 determines that the possibility of condensation has been eliminated on the outer surface of the window glass, And returns the upper limit value of the opening of the tempdoor (8) to the cold air passage (8a) to the original state. 8. The method according to any one of claims 1 to 7,
The window pane outer surface condensation occurrence determination means (10)
A window glass side air temperature sensor 12 for sensing the temperature of the air discharged to the window glass side, an outdoor humidity sensor 14 for sensing the humidity of the outside of the car, and an outside temperature sensor 15, an inside temperature sensor 16 for detecting the temperature of the inside of the vehicle, a vehicle speed sensor 18 for detecting the running speed of the vehicle,
The outdoor air temperature sensor 16 detects whether the outside outdoor air temperature input from the outdoor air temperature sensor 14 is greater than or equal to a reference humidity stored in advance, And the condition that the vehicle speed input from the vehicle speed sensor 18 is equal to or lower than a predetermined reference vehicle speed and the condition that the outdoor air temperature inputted from the outdoor temperature sensor 15 is lower than the window glass side discharge air temperature It is determined that there is a possibility that a condensation phenomenon may occur on the outer surface of the windowpane if all of the conditions of the windowpipe side discharge air temperature and the windowpipe side discharge air temperature input from the detection sensor 12 are satisfied. And a microcomputer (19) for judging that the occurrence of condensation on the outer surface of the windowpane is resolved.

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