KR102026190B1 - Air conditioning system for automotive vehicles - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and in an environmental condition having a high probability of occurrence of a "condensation phenomenon" on the outer surface of a window glass, the cold air of low temperature is formed by actively controlling the temperature of the air discharged to the window glass side. An object of the present invention is to be able to prevent "condensation" on the outer surface of the window glass due to the discharge.
In order to achieve the above object, the present invention, the temper door to adjust the opening degree of the cold air passage and the hot air passage while rotating the movement between the cold air passage and the hot air passage of the air conditioning case, the air temperature controlled by the temp door side window pane In a vehicle air conditioner including a defrost vent discharged to a window glass, when cold air is discharged from the defrost vent to the window glass, condensation may occur on an outer surface portion of the window glass corresponding to the defrost vent. Window glass outer surface dew condensation determination means for determining; When the window glass outer surface dew condensation determination means determines that there is a risk of dew condensation on the outer surface of the window glass, it is provided with a control unit for preventing condensation of the window glass outer surface using an air conditioning apparatus while entering the condensation prevention mode.

Description

Air Conditioning System for Vehicles {AIR CONDITIONING SYSTEM FOR AUTOMOTIVE VEHICLES}

The present invention relates to a vehicle air conditioner, and more particularly, in an environmental condition in which a high probability of "condensation" is generated on the outer surface of the window glass, it is configured to actively control the temperature of the air discharged to the window glass side. Thereby, the present invention relates to a vehicle air conditioner that can prevent the "condensation phenomenon" of the window glass outer surface due to low-temperature cold wind discharge.

An air conditioner is installed in a car to cool and heat a cabin. As shown in FIG. 1, the air conditioning apparatus includes an air conditioning case 1, and the air conditioning case 1 includes a blower 3, an evaporator 5, a heater 7, and a temp. Door. (8) is installed.

The blower 3 sucks inside and outside air and blows the sucked inside and outside air into the inner passage 1a of the air conditioning case 1.

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

The heater 7 heats the air blown from the blower 3 and supplies it to the vehicle interior. Therefore, the vehicle interior is heated.

The temp door 8 is installed at the branch point of the cold air passage 8a and the hot air passage 8b, and rotates between the cold air passage 8a and the hot air passage 8b, and the cold air passage 8a and the hot air passage. Adjust the opening amount of (8b). Therefore, the amount of cold and hot air supplied into the vehicle cabin is adjusted.

The air conditioning apparatus includes a defrost door 9 provided in the air conditioning case 1.

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

By the way, in the 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 temp 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 that condensation phenomenon occurs on the outer surface of the window glass side where the cold air is discharged, there is a problem that it is difficult to secure the field of view of the driver.

In particular, when the environmental conditions are very likely to cause "condensation" on the outer surface of the window glass, for example, high humidity outside the cabin, high temperature deviation outside the cabin, and slow running speed of the vehicle, The "condensation phenomenon" is very severely generated on the outer surface of the, and in this case, there is a problem that it is difficult to secure the driver's field of view due to the "condensation phenomenon" on the outer surface of the window glass, and as a result, it is pointed out that the disadvantage of preventing safe driving.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its object is to actively control the temperature of the air discharged to the window glass under environmental conditions in which it is very likely that "condensation" will occur on the outer surface of the window glass. It is to provide a vehicle air conditioning apparatus that can prevent the "condensation phenomenon" of the outer surface of the window glass due to the low temperature cold air discharge by configuring to control to.

Another object of the present invention, by configuring to prevent the "condensation phenomenon" of the outer surface of the window glass, by the vehicle air conditioning apparatus that can solve the driver's "field of view difficulty" due to the "condensation phenomenon" of the outer surface of the window glass To provide.

Still another object of the present invention is to provide a vehicle air conditioner that can achieve the effect of safe driving by configuring the driver to solve the "field of view difficulty" caused by the "condensation phenomenon" on the outer surface of the window glass. .

In order to achieve this object, the vehicle air conditioner according to the present invention, by the temporal door and the temper door to adjust the opening amount of the cold air passage and the hot air passage while rotating between the cold air passage and the hot air passage of the air conditioning case, A vehicle air conditioner comprising a defrost vent for discharging temperature-controlled air toward a window glass side, wherein when cold air is discharged from the defrost vent to the window glass side, an outer surface portion of the window glass corresponding to the defrost vent is provided. Dew condensation occurrence determining means for determining whether or not there is a possibility of condensation occurring; And a control unit for preventing condensation on the outer surface of the window glass using an air conditioning device when entering the condensation preventing mode when the window glass outer surface condensation occurrence determining means determines that there is a risk of condensation on the outer surface of the window glass. It is characterized by.

Preferably, the control unit, when entering the condensation prevention mode, characterized in that to prevent the condensation phenomenon on the outer surface of the window glass by adjusting the temperature of the air discharged to the window glass side.

The controller may control an opening position of the temporal door with respect to the cold air passage when entering the condensation prevention mode.

And the control unit, when entering the condensation prevention mode, characterized in that for controlling the blower to reduce the amount of air flow discharged to the window glass side.

The control unit lowers the opening upper limit of the temp door to the cold air passage to a preset upper limit so that the opening degree of the cold air passage is not excessively opened beyond a preset opening amount when entering the condensation prevention mode. It is characterized by.

The control unit is further configured to limit the opening position of the temporal door when the opening position of the temporal door with respect to the cold air passage is controlled in a state exceeding the upper limit value when entering the condensation prevention mode. It is characterized by controlling to lower below the upper limit.

The controller is released from the condensation prevention mode when the window glass outer surface condensation occurrence determining means determines that the possibility of condensation occurrence on the outer surface of the window glass has been eliminated in the state of entering the condensation prevention mode. It is characterized by returning the upper limit of the opening of the temp door to the cold air passage.

And the window glass outer surface dew condensation determination means, the window glass side discharge air temperature sensor for detecting the temperature of the air discharged to the window glass side, the outdoor humidity sensor for detecting the humidity outside the vehicle, the outside air temperature for detecting the temperature outside the vehicle A condition for detecting a degree sensor, an internal temperature sensor for detecting a temperature in a vehicle, a vehicle speed sensor for detecting a driving speed of a vehicle, and an exterior humidity input from the outdoor humidity sensor is above a preset reference humidity. And a condition of whether the outside air temperature input from the outside air temperature sensor is equal to or higher than the inside air temperature input from the air temperature sensor, and whether the vehicle speed input from the vehicle speed detecting sensor is below a preset reference vehicle speed, and the outside air temperature. The outside air temperature input from the sensor is equal to or greater than the discharge air temperature of the window glass input from the window air discharge temperature sensor. If all of the conditions are satisfied, it is determined that condensation may occur on the outer surface of the window glass, and if any of the above conditions are not satisfied, the microcomputer determines that the possibility of condensation on the outer surface of the window glass is eliminated. And Micom.

According to the vehicle air conditioner according to the present invention, in the condition that there is a risk of "condensation generation" on the outer surface of the window glass, since it is a structure that actively limits the "open upper limit" of the temper door to the cold air passage, the outer surface of the window glass Prevents excessive opening of the cold air passage when there is a risk of "condensation", and thereby, the temperature of the air discharged from the defrost vent to the window glass when there is a risk of "condensation" on the outer surface of the window glass. There is an effect of preventing too low.

In addition, if there is a risk of "condensation" on the outer surface of the window glass, the condensation phenomenon on the outer surface of the window glass due to the low temperature "cold discharge" because it is a structure to prevent the temperature of the air discharged to the window glass is too low. There is an effect that can be prevented at the source.

In addition, since the "condensation phenomenon" of the window glass outer surface can be prevented at the source, there is an effect that can eliminate the "field of view difficulty" of the driver due to the "condensation phenomenon" of the window glass outer surface.

In addition, since it is possible to solve the driver's "field of view difficulty" due to the "condensation phenomenon" on the outer surface of the window glass, there is an effect that can promote the driver's safe driving.

1 is a view showing a conventional vehicle air conditioner,
2 is a view showing the configuration of a vehicle air conditioner according to the present invention;
3 is a flowchart showing an operation example of the 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 will be described with the same reference numerals).

First, before looking at the features of the vehicle air conditioner according to the present invention, a brief description of the vehicle air conditioner with reference to FIG.

The air conditioner includes an air conditioner case 1, and the air conditioner case 1 is provided with a blower 3, an evaporator 5, a heater 7, and a temper door 8.

The blower 3 sucks inside and outside air and blows the sucked inside and outside air into the inner passage 1a of the air conditioning case 1.

The evaporator 5 cools the air blown from the blower 3 and supplies it to the vehicle interior. The heater 7 heats the air blown from the blower 3 and supplies it to the vehicle interior.

The temp door 8 adjusts the amount of opening of the cold air passage 8a and the hot air passage 8b while rotating between the cold air passage 8a and the hot air passage 8b. Therefore, the amount of cold and hot air supplied into the vehicle cabin is adjusted.

The air conditioner includes a defrost door 9 provided in the air conditioner case 1.

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

Next, the features of the vehicle air conditioner according to the present invention will be described in detail with reference to FIGS. 2 and 3.

First, referring to FIG. 2, the air conditioner of the present invention includes a window glass outer surface dew condensation occurrence determining means 10 for determining whether or not there is a fear that "condensation phenomenon" may occur on the outer surface of the window glass.

The window glass outer surface dew condensation determination means 10 includes a window glass side discharge air temperature sensor 12, an outdoor humidity sensor 14, an outside air temperature sensor 15, an air temperature sensor 16 and And a vehicle speed sensor 18 and a Micom 19.

The window glass side discharge air temperature sensor 12 is a temperature sensor installed on the defrost vent 9a side, and detects the temperature of the air discharged from the defrost vent 9a to the window glass side, and then detects the detected "window side". Discharge air temperature data "

The outdoor humidity sensor 14 is a humidity sensor installed outside the vehicle, and detects the humidity outside the vehicle, and then inputs the detected "outdoor humidity data" to the microcomputer 19 which will be described later.

The outside temperature sensor 15 is a temperature sensor installed outside the vehicle, and senses the temperature outside the vehicle, and then inputs the detected "outdoor temperature data" to the microcomputer 19 described later.

The internal temperature sensor 16 is a temperature sensor installed in a vehicle interior, and detects the temperature in the vehicle interior, and then inputs the detected "product temperature data" to the microcomputer 19 which will be described later.

The vehicle speed sensor 18 detects the traveling speed of the vehicle and inputs the detected "vehicle speed data" to the microcomputer 19 described later.

The microcomputer 19 is formed from the window glass side discharge air temperature sensor 12, the outdoor humidity sensor 14, the outdoor air temperature sensor 15, the air temperature sensor 16, and the vehicle speed sensor 18. When the side discharge air temperature data, the "outdoor humidity data", the "outside temperature data", the "keep temperature data" and the "vehicle speed data" are input, respectively, the input "data" and the pre-built "reference data" The comparison process is performed to determine whether or not the condition is likely to cause "condensation" on the outer surface of the window glass.

In particular, whether the "outdoor cabin humidity" input from the outdoor humidity sensor 14 is equal to or greater than the preset reference humidity, and the "outdoor temperature" input from the outside air temperature sensor 15 is the inside temperature sensor 16. Whether the temperature is equal to or greater than the " pitch temperature " input from the vehicle speed sensor, whether the traveling speed of the vehicle input from the vehicle speed sensor 18 is equal to or less than the preset reference speed, and the " outer air temperature " The window glass side discharge air temperature sensor 12 determines whether or not the input window glass side discharge air temperature is equal to or greater than that.

At this time, when all of these conditions are satisfied, that is, "outdoor humidity" is "standard humidity" or more, "outside temperature" is "below" and the vehicle's traveling speed is "standard vehicle speed" or less, and "outdoor temperature". If Fig. "Is equal to or greater than" window-side discharge air temperature ", the microcomputer 19 determines that there is a risk of" condensation "on the outer surface of the windowpane.

And according to this determination, the microcomputer 19 outputs "window dew condensation generation signal S1." In particular, the "window condensation generation signal S1" is output and input to the controller 20 to be described later.

Here, after the microcomputer 19 outputs the "window dew condensation generation signal S1", the "outdoor cabin humidity" is less than the "standard humidity", or the "outdoor temperature" is less than the "betting temperature", or the vehicle If the traveling speed of the vehicle exceeds " reference vehicle speed " or " outer air temperature " is lower than " window-side discharge air temperature ", the microcomputer 19 determines that there is no fear of "condensation" on the outer surface of the window glass, In accordance with this determination, the "window condensation generation signal S1" is canceled.

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

The control unit 20 is equipped with a microprocessor. When the "window dew condensation generation signal S1" is input from the window pane outer surface dew condensation generation determining means 10, the "condensation phenomenon" may occur on the outer surface of the window glass. It is determined that there is a "condensation prevention mode 22" to enter.

Then, the control unit 20 entering the "condensation prevention mode 22" controls the temporal door 8 to control the temperature of the air discharged to the window glass side.

In particular, the opening upper limit of the temp door 8 with respect to the cold air passage 8a is limited to the preset size B so that the opening amount of the cold air passage 8a is not excessively opened beyond the preset opening amount. . Hereinafter, the "open upper limit value" of a predetermined size is called "limit upper limit value B".

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

Accordingly, the driver's "field of view difficulty" due to the "condensation phenomenon" on the outer surface of the window glass can be eliminated, thereby enabling safe driving.

On the other hand, the control unit 20 has already opened the opening position of the temporal door 8 with respect to the cold air passage 8a at the time of entry of the "condensation prevention mode 22" in a state exceeding the "limit upper limit value B". When controlled, for example, when the temp door 8 is controlled to the "maximum cooling position A", the opening position of the temp door 8 is lower than the "limit upper limit value B". Control to lower.

Therefore, 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, "condensation" on the outer side of the window glass due to the low temperature "cold air discharge" is essentially prevented.

Referring again to FIG. 2, the control unit 20 enters the "window dew condensation generation signal S1 input from the window pane outer surface dew condensation occurrence determination means 10 in a state of entering the" frost protection mode 22 ". Is cleared, it is released from the "condensation prevention mode 22".

And the control part 20 canceled | released from the "condensation prevention mode 22" returns the "open upper limit value" of the temp door 8 with respect to the cold air flow path 8a to an original state. Therefore, the opening position of the temporal door 8 can be normally controlled as it was.

On the other hand, in the description and drawings of the present invention, the microcomputer 19 of the window glass outer surface condensation occurrence determining means 10 for determining the "condensation phenomenon" of the window glass outer surface is described as being configured separately from the control unit 20. In some cases, the controller 20 may simultaneously perform the role of the microcomputer 19.

In this case, the control unit 20, the window glass side discharge air temperature sensor 12, the outdoor humidity sensor 14, the outdoor air temperature sensor 15, the air temperature sensor 16 and the vehicle speed sensor 18 By processing the "data" input from the window to determine whether the "condensation phenomenon" occurs on the outer surface of the window glass.

And the control part 20 of this invention may control the blower 3, when entering into the condensation prevention mode 22, and may control the air volume discharged to the window glass side. In particular, the air volume discharged to the window glass side can be reduced to prevent condensation on the window glass outer surface.

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

First, referring to FIG. 3, in the state where the air conditioner is turned on (S101), it is determined whether or not the condition that there is a risk of "condensation" is formed on the outer surface of the window glass (S103 to S109).

The judgment at this time includes the condition (S103) of whether the "outdoor humidity" is equal to or higher than the "standard humidity", the condition (S105) of whether the "outside air temperature" is equal to or higher than the "pitch temperature", and the running speed of the vehicle is "standard vehicle speed It discriminates according to whether or not the following conditions (S107) and "outer air temperature" satisfy the condition (S109) of "window-side discharge air temperature" or more.

As a result of the determination, when all of these conditions are satisfied, the control unit 20 determines that there is a high risk of occurrence of "condensation phenomenon" on the outer surface of the window glass, and enters the "condensation prevention mode 22" (S111).

Then, the control unit 20 entering the "condensation prevention mode 22" limits the "open upper limit value" of the temp door 8 with respect to the cold air passage 8a to the preset "limit upper limit value B" (S113). ).

Then, the temp door 8 is not controlled beyond the "limit upper limit value B". Therefore, the cold air passage 8a is not excessively opened beyond the preset opening amount.

Thereby, the amount of cold air of the evaporator 5 which flows into the cold air passage 8a is restrict | limited. As a result, the temperature of the air discharged to the window glass side through the defrost vent 9a is prevented from becoming too low. As a result, "condensation" on the outside surface of the window glass due to low temperature "cold air discharge" is essentially prevented.

On the other hand, in the state of entering the "condensation prevention mode 22", it continues to discriminate | determine whether it is a condition which may be "condensation generation | occurrence | production" on the outer surface of the window glass (S103-S109).

At this time, when it is determined that it is not a condition that may cause "condensation", that is, "outdoor humidity" is less than "standard humidity" (S103-1), or "outdoor temperature" is less than "betting temperature" (S105-1), or when the running speed of the vehicle exceeds the "reference vehicle speed" (S107-1) and the "outer air temperature" is less than the "window-side discharge air temperature" (S109-1), the control unit 20 ) Is released from the "condensation prevention mode 22" (S115).

Then, the control unit 20 released from the "condensation prevention mode 22" returns the "open upper limit value" of the temp door 8 with respect to the cold air passage 8a to the original state (S117). Then, the opening position of the temporal door 8 is normally controlled as it was.

According to the air conditioner of this invention which has such a structure, in the condition which may cause "condensation | condensation" on the outer surface of a window glass, the "upper limit of opening" of the temporal door 8 with respect to the cold air passage 8a is actively restricted. This structure prevents excessive opening of the cold air passage 8a when there is a risk of "condensation" on the outer surface of the window glass, and thereby prevents "condensation" on the outer surface of the window glass. The temperature of the air discharged from the defrost vent 9a to the window glass side is prevented from becoming too low.

In addition, if there is a risk of "condensation" on the outer surface of the window glass, the condensation phenomenon on the outer surface of the window glass due to the low temperature "cold discharge" because it is a structure to prevent the temperature of the air discharged to the window glass is too low. Can be prevented at the source.

In addition, since the "condensation phenomenon" of the outer surface of the window glass can be prevented at the source, the driver's "field of view difficulty" due to the "condensation phenomenon" of the outer surface of the window glass can be eliminated.

In addition, since the driver's "field of view difficulty" due to the "condensation phenomenon" on the outer surface of the window glass can be solved, the driver's safe driving can be achieved.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope of the claims.

1: Air Conditioning Case (Case) 3: Blower
5: Evaporator 7: Heater
8: Temp.Door 8a: Cold Air Path
8b: Hot Air Path 9: Defrost Door
9a: Defrost Vent
10: means for determining the dew condensation on the outside of the window glass
12: Discharge air temperature sensor on the window glass side
14: outdoor humidity sensor 15: outdoor temperature sensor
16: Air temperature sensor 18: Vehicle speed sensor
19: Micom 20: control unit
22: Condensation prevention mode A: Maximum cooling position
B: upper limit

Claims (8)

A temp door 8 for adjusting the opening amount of the cold air passage 8a and the hot air passage 8b while rotating between the cold air passage 8a and the hot air passage 8b of the air conditioning case 1, and the temp door. A vehicle air conditioner comprising a defrost vent 9a for discharging air regulated by (8) in a window glass side direction,
When the cold wind is discharged from the defrost vent (9a) to the window glass side, the condensation on the outside of the window glass to determine whether there is a risk of condensation on the outer surface portion of the window glass corresponding to the defrost vent (9a) Generation discrimination means (10);
When the window condensation occurrence determination means 10 determines that there is a risk of condensation on the outer surface of the window glass, the condensation phenomenon on the outer surface of the window glass is entered by using the air conditioning device while entering the condensation prevention mode 22. It includes a control unit 20 to prevent,
The control unit 20,
When entering the condensation prevention mode 22, by controlling the temperature of the air discharged to the window glass side to prevent condensation on the outer surface of the window glass,
Upon entering the condensation prevention mode 22, the opening position of the temporal door 8 with respect to the cold air passage 8a is controlled.
When entering the condensation prevention mode 22, the upper limit of the opening of the temp door 8 with respect to the cold air passage 8a so that the opening amount of the cold air passage 8a is not excessively opened beyond a preset opening amount. Vehicle air conditioner, characterized in that to lower the predetermined upper limit (B). delete delete The method of claim 1,
The control unit 20,
When entering the condensation prevention mode (22), by controlling the blower (3) to reduce the amount of air flow discharged to the window glass side. delete The method of claim 1,
The control unit 20,
When entering the condensation prevention mode 22, when the opening position of the temporal door 8 with respect to the cold air passage 8a is already controlled in a state exceeding the limit upper limit value B, the A vehicle air conditioner, characterized in that for controlling the opening position of the temp door (8) to be lowered below the limit upper limit (B). The method of claim 6,
The control unit 20,
In the state of entering the condensation prevention mode 22, when the window glass outer surface condensation occurrence determining means 10 determines that the possibility of condensation occurrence on the outer surface of the window glass has been eliminated, the condensation prevention mode 22 And an upper limit of the opening of the temporal door (8) for the cold air passage (8a) to the original state while being released from the cooling air passage. A temp door 8 for adjusting the opening amount of the cold air passage 8a and the hot air passage 8b while rotating between the cold air passage 8a and the hot air passage 8b of the air conditioning case 1, and the temp door. A vehicle air conditioner comprising a defrost vent 9a for discharging air regulated by (8) in a window glass side direction,
When the cold wind is discharged from the defrost vent (9a) to the window glass side, the condensation on the outside of the window glass to determine whether there is a risk of condensation on the outer surface portion of the window glass corresponding to the defrost vent (9a) Generation discrimination means (10);
When the window condensation occurrence determination means 10 determines that there is a risk of condensation on the outer surface of the window glass, the condensation phenomenon on the outer surface of the window glass is entered by using the air conditioning device while entering the condensation prevention mode 22. It includes a control unit 20 to prevent,
The window glass outer surface dew condensation determination means 10,
Window air discharge air temperature sensor 12 for detecting the temperature of the air discharged to the window glass side, outdoor humidity sensor 14 for detecting the humidity outside the vehicle, and outside temperature sensor for detecting the temperature outside the vehicle ( 15), the air temperature sensor 16 for detecting the temperature in the vehicle interior, the vehicle speed sensor 18 for detecting the running speed of the vehicle,
The condition of whether the vehicle exterior humidity input from the outdoor humidity sensor 14 is equal to or greater than a preset humidity stored in advance and the outside air temperature input from the outside temperature sensor 15 are inputted from the inside temperature sensor 16. The condition of whether the temperature is equal to or greater than the internal temperature, the condition of whether the vehicle speed input by the vehicle speed sensor 18 is equal to or less than a preset reference vehicle speed, and the outdoor air temperature input by the external air temperature sensor 15 are the window air discharge air temperature. If all of the conditions of the window glass side discharge air temperature input from the sensor 12 are satisfied, it is determined that there is a risk of condensation on the outer surface of the window glass, and if none of the above conditions are satisfied, And Micom (19) for determining that the fear of condensation occurring on the outer surface of the window glass has been eliminated.

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