JP3565030B2 - Defroster device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a defroster device suitable for use in removing fogging of a windshield of an automobile.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a vehicle air conditioner shown in FIG. 5 is known.
As shown in FIG. 5, an inside / outside air switching damper 3 for switching between inside air and outside air is provided at a suction port 2 in the main body casing 1, and air taken in from this is blown by a blower fan 4, and when the air passes through the evaporator 5. Cooled. Then, the amount of air passing through the heater core 8 is adjusted by the air mix damper 7 provided in the heater unit 6, and the temperature of the air blown into the vehicle interior is adjusted.
[0003]
The heater unit 6 further includes a foot damper 9 that distributes air to the occupant's feet, a face damper 10 that distributes air to the occupant's face, and a defroster damper 12 that distributes air to the windshield 11. The dampers 9, 10, and 12 are controlled to rotate by a link and a control cable (not shown) by operating an operation button provided in the vehicle cabin, so that air distribution is performed from a desired position of the occupant.
[0004]
When air is distributed to the windshield 11, air for air conditioning passes through the defroster duct 13 from the defroster damper 12, and the defroster duct 13 is roughly divided into two types.
6A and 6B show a structure of a defroster duct 13 called a fish tail type. In this structure, the width of the windshield 14 is about 600 mm while the width of the windshield is about 1300 mm. . Then, as shown in FIG. 6B, the cross section of the defroster duct 13 is directed toward the outlet and the flow path is narrowed, and the cross section of the defroster duct 13 is expanded in the width direction from a portion where the change in the cross section is reduced. Therefore, the flow rate of the air that has passed through the defroster damper 12 increases at the narrowed portion of the defroster duct 13, and a large amount of air with a high flow rate blows mainly from the center of the outlet. Therefore, the fogging of the windshield 11 is removed from the lower center toward the periphery.
[0005]
7A and 7B show a structure of a defroster duct 13 called a pressure type. In this structure, the width of the outlet 14 is about 1000 mm, which is almost the same as the width of the windshield 11. Then, as shown in FIG. 7B, the cross section of the defroster duct 13 is widened in the width direction with almost no change, and is narrowed immediately below the outlet 14. In this case, the air that has entered the inside of the defroster duct 13 spreads in the width direction at the swelling portion immediately below the outlet, and air having a substantially uniform flow rate blows out from the entire outlet toward the windshield 11. Therefore, the fogging of the windshield 11 is removed from the lower part to the upper part over the entire width of the lower part of the windshield.
[0006]
[Problems to be solved by the invention]
By the way, in the case of the above-mentioned fish tail type defroster duct, the cost is low because the duct is small, and when using in a state with a large amount of air, a large amount of wind with high flow velocity comes out from the center, so that the view of the center can be secured quickly. Although there is an advantage, it takes time to remove the fogging around the glass, and there is a drawback that the fog cannot be removed because the wind does not reach around the glass when the air volume is small.
[0007]
In addition, in the case of the pressure type defroster duct described above, although the wind is uniformly emitted in the width direction, it is possible to remove cloudiness at the four corners, but since the duct is large, the cost is high, and since the flow velocity is slow, it takes time to remove the entire cloudiness. There is the disadvantage of doing so. In order to solve this problem, as described in Japanese Utility Model Publication No. 5-462, a dedicated duct for distributing the air is provided only in front of the driver's seat in addition to the normal defroster duct, and the duct is blown into the vehicle interior when the engine is started. When the air temperature is low, air may be distributed from the driver's seat duct.However, providing the driver's seat duct further increases costs and increases the resistance due to the complicated flow path. There is a drawback that the blowing efficiency deteriorates.
[0008]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a defroster device capable of quickly and reliably removing fogging of a windshield with a simple structure.
[0009]
[Means for Solving the Problems]
For this reason, in the defroster device of the present invention, the connection portion with the heater unit in the fishtail type defroster duct connected to the heater unit does not affect the flow of air in the defroster duct when opened, A sub-damper that obstructs the flow at substantially the center in the defroster duct is provided so as to be openable and closable, and when the sub-damper is opened, air is distributed from the defroster duct toward the center of the windshield. The sub damper is disposed at the center of the connection between the defroster duct and the heater unit, and in the closed state, about 1/1 of the total width of the connection in the width direction. 3 so that a gap is left partially in the longitudinal direction . Thus, when the sub-damper is opened, air is distributed from the defroster duct toward the center of the windshield, and when the sub-damper is closed, air is distributed from the defroster duct in the width direction of the windshield to distribute air. It can be changed , and blowout from the central portion is suppressed, resulting in a substantially uniform flow velocity distribution in the width direction.
An air mix damper for adjusting the amount of air passing through the heater core is provided in the heater unit , and a defroster mode which is selected when the windshield of the windshield is to be rapidly cleared is provided. until passage back a predetermined time, the air mix damper and the Sabudanpa is the maximum opening both, are such that the temperature of air blown is the highest, and the air mixing damper when the predetermined time has elapsed It is preferable that all the sub dampers are closed.
The Sabudanpa is to rotate in response to the displacement of the air mix damper, which is preferably mechanically coupled to said error Amikkusu damper.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 4 show a defroster apparatus as an embodiment of the present invention. 1 to 3, the same members as those in the related art are denoted by the same reference numerals, and detailed description is omitted. Parts other than the main configuration shown in FIG. 1 are configured in the same manner as the prior art shown in FIG.
[0011]
1A and 1B show a cross section of the defroster device of the present embodiment. As shown in FIGS. 1A and 1B, the structure of the defroster duct 13 according to the present embodiment is shown in FIG. This is the same as the conventional fish tail type shown in a) and (b). In the case of the present defroster device, a sub damper 15 is rotatably provided at a connection portion between the defroster duct 13 and the heater unit 6. The rotation angle of the sub damper 15 is configured to rotate according to the displacement of the air mix damper 7 (see FIG. 5) via a link or a cable (not shown). The heater unit 6 is provided with a defroster damper 12 at a position adjacent to the defroster duct 13.
[0012]
State Sabudanpa 15 which is rotated upwardly as shown by the solid line in FIG. (Hereinafter, Sabudanpa 15 describes an open state), the Sabudanpa 15 can affect the flow of air flowing into the defroster duct 13 Instead, the distribution of the flow velocity portion as shown in FIG. 2 is obtained, and the air with a high flow velocity blows out around the center of the windshield 11.
[0013]
Further, in the state Sabudanpa 15 which is rotated downward as shown by the two-dot chain line in FIG. (Hereinafter Sabudanpa 15 describes a closed state), as shown in FIG. 1 (a), (b), defroster ducts At the center of the connection between the heater 13 and the heater unit 13, about 1/3 in the width direction, and a gap remains in the longitudinal direction. Therefore, as shown in FIG. 3, the blowing from the central portion is suppressed, and the flow velocity distribution becomes substantially uniform in the width direction, so that the air is blown uniformly over the entire surface of the windshield 11.
[0014]
Next, the operation of the defroster device of the present embodiment will be described.
When it is desired to quickly clear the fogging of the windshield when the engine is started, the defroster mode is selected by an operation button provided in the vehicle interior and the temperature of the blown air is selected to be the highest. In the case of an automatic air conditioner, the temperature of the blown air is controlled such that the temperature of the blown air becomes the highest until a predetermined time has elapsed, and the blown air has the initial set temperature after the predetermined time has elapsed.
[0015]
By selecting the defroster mode, control is performed so that the foot damper 9 and the face damper 10 provided in the main casing 1 are closed and the defroster damper 12 is opened. Further, by setting the temperature of the air to be blown, the opening degree of the air mix damper 7 is set to the maximum (100%) until a predetermined time elapses as shown in FIG. After that, it is closed to the opening which becomes the initial set temperature.
[0016]
Further, as described above, the sub damper 15 and the air mix damper 7 are mechanically connected, and the opening degree of the sub damper 15 is such that the opening degree of the air mix damper 7 is the maximum as shown in FIG. At this time, the opening degree of the sub damper 15 is maximized, and the sub damper 15 is closed as the air mix damper 7 is closed.
Therefore, the opening degree of the sub-damper 15 is maximum until the predetermined time elapses, so that a large amount of air having a high temperature and a high flow velocity is blown toward the center of the windshield, and a view of the center of the windshield can be quickly secured.
[0017]
Then, when a predetermined time has passed and the fogging at the center of the windshield clears, the sub-damper 15 is closed, so that air is blown out evenly in the width direction of the windshield 11 and the fogging at the end of the windshield 11 can be cleared. it can.
Therefore, according to the defroster device of the present embodiment, especially when the windshield 11 is frozen, such as when the engine is started in winter, the temperature is high, and a large amount of air with a high flow velocity blows out, so that the field of view can be quickly secured. In addition, since the air mix damper 7 and the sub-damper 15 are mechanically connected, the advantages of a simple configuration and low cost can be obtained.
[0018]
Note that an actuator for controlling the opening degree of the sub damper 15 may be provided instead of the configuration in which the sub damper 15 is linked to the air mix damper 7, and the operation of the actuator may be controlled. For example, the degree of opening of the sub-damper 15 is related to the amount of air flow, and when the amount of air is large, the degree of opening of the sub-damper 15 is maximized. It can be resolved quickly.
[0019]
In addition, when the opening degree of the sub damper 15 is maximized for a predetermined time from when the defroster mode is selected, and the sub damper 15 is closed after the predetermined time has elapsed, when the defroster mode is selected, the position of the air mix damper 7 is not affected. First, the fogging at the center of the windshield can be quickly eliminated, and the temperature in the vehicle interior can be easily maintained at the set temperature.
[0020]
【The invention's effect】
As described above, according to the defroster device of the present invention, the open state of the defroster duct does not affect the flow of air in the defroster duct, and the closed state of the defroster duct hinders the substantially central flow in the defroster duct. A sub damper is provided so as to be openable and closable, and when the sub damper is opened, air is distributed from the defroster duct toward the center of the windshield, and when the sub damper is closed, air is spread in the width direction of the windshield from the defroster duct. With a simple configuration, the cost is low with a simple configuration.When the sub-damper is open, a large amount of air is blown to the center of the windshield, and when the sub-damper is closed, the air distribution can be changed so that it blows to the end of the front glass, ensuring fogging. Can be eliminated.
In addition, when the defroster duct is a fishtail type defroster duct, the cost is low because the duct is small, and when used in a state with a large amount of airflow, a large amount of wind with a high flow velocity comes out from the central part so that the visibility of the central part is reduced. Although it has the advantage that it can be secured quickly, it takes time to remove the fogging around the glass, and if the air volume is small, the wind will not reach the surroundings of the glass and it will not be possible to remove the fogging. Since the air is distributed so as to be blown to the edge of the glass, the air is blown out evenly in the width direction of the windshield, so that the fogging at the edge of the windshield can be eliminated .
Further, the sub damper is disposed at the center of the connection portion between the defroster duct and the heater unit, and in the closed state, occupies about 1/3 of the entire width of the connection portion in the width direction, and partially in the longitudinal direction. If it is arranged so that a gap remains, the blowing from the central portion is suppressed, and the flow velocity distribution becomes substantially uniform in the width direction, so that the air is blown evenly over the entire surface of the windshield . Claim 1).
In addition, an air mix damper for adjusting the amount of air passing through the heater core is provided in the heater unit, and a defroster mode selected when the windshield of the windshield is to be quickly cleared is provided.In the defroster mode, Until a predetermined time elapses after the mode is selected , the air mix damper and the sub damper are both set to the maximum opening so that the temperature of the blown air is maximized. Since both the damper and the sub-damper are closed, the opening degree of the sub-damper is maximized until a predetermined time elapses. Blows out quickly to secure the view in the center of the windshield. When the cloudiness at the center of the windshield clears after a lapse of a predetermined time, the sub-damper is closed, and air is blown out evenly in the width direction of the windshield, so that the wind at the edge of the windshield can be cleared. Therefore, according to the defroster device of the present embodiment, especially when the windshield 11 is frozen, such as when the engine is started in winter, the temperature is high, and a large amount of air with a high flow velocity blows out, so that the field of view can be quickly secured. (Claim 2).
Further, Sabudanpa is, to pivot in response to the displacement of the air mix damper and is connected to e Amikkusu damper mechanically, simple and low cost construction, be linked with the air mixing damper the Sabudanpa Yes (claim 3) .
[Brief description of the drawings]
FIGS. 1A and 1B are schematic diagrams showing a configuration of a main part of a defroster device as one embodiment of the present invention, wherein FIG. 1A is a front view thereof, and FIG.
FIG. 2 is a view for explaining the operation of the defroster device as one embodiment of the present invention, and is a flow velocity distribution chart when a sub damper is opened.
FIG. 3 is a diagram for explaining the operation of the defroster device as one embodiment of the present invention, and is a flow velocity distribution diagram when a sub damper is closed.
FIGS. 4A and 4B are diagrams for explaining the operation of the defroster device as one embodiment of the present invention, in which FIG. 4A shows the opening of the air mix damper, and FIG. ing.
FIG. 5 is a schematic view showing a structure of a conventional vehicle defroster.
FIG. 6 is a schematic view showing a conventional fishtail type defroster device, where (a) is a front view and (b) is a side view.
FIGS. 7A and 7B are schematic diagrams showing a conventional pressure type defroster device, wherein FIG. 7A is a front view and FIG. 7B is a side view.
[Explanation of symbols]
6 Heater unit 7 Air mix damper 11 Windshield 12 Defroster damper 13 Defroster duct 15 Sub damper

Claims (3)

In a defroster device having a defroster duct connected to a heater unit and a defroster outlet for blowing air from the defroster duct to the inner surface of a windshield,
The defroster duct is a fishtail type defroster duct,
Opening and closing a sub-damper at a connection portion of the defroster duct with the heater unit, which does not affect the flow of air in the defroster duct in an open state, and blocks a substantially central air flow in the defroster duct in a closed state. Provided as possible,
When the sub-damper is open, air is distributed from the defroster duct toward the center of the windshield, and when the sub-damper is closed, air is spread in the width direction of the windshield from the defroster duct, and air is distributed .
The sub-damper is disposed at the center of the connection portion between the defroster duct and the heater unit. In the closed state, the sub-damper occupies about 1/3 of the entire width of the connection portion in the width direction, and a gap is partially formed in the longitudinal direction. A defroster device, which is disposed so as to remain . An air mix damper for adjusting the amount of air passing through the heater core is provided in the heater unit, and a defroster mode selected when the windshield of the windshield is to be quickly cleared is provided.
In the defroster mode, until the predetermined time elapses after the mode selection, the air mix damper and the Sabudanpa is the maximum opening both, are such that the temperature of air blown is the highest, is the predetermined time The defroster device according to claim 1, wherein both the air mix damper and the sub damper are closed when the time elapses. The Sabudanpa is to rotate in response to the displacement of the air mixing damper, characterized in that it is mechanically connected with said error Amikkusu damper, defroster device according to claim 2.

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