JP2012001176A - Device for swithcing of inside/outside air - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent entry of outside air into a vehicle interior due to a back-flow from a gap for taking part of inside air into a case in an inside/outside air switching device.SOLUTION: The device includes a gap flow channel 10 which connects the inside of a vehicle interior with the inside of a case 1 when a rotary damper 2 closes an inside air introducing port 1a and normally opens at a position not affected by a ram pressure applied from an outside air introducing port when a vehicle travels.

Description

  The present invention relates to an inside / outside air switching device.

The inside / outside air switching device is mounted on a vehicle and is used to selectively take in the inside air inside the vehicle or outside air outside the vehicle into the air conditioner for the vehicle, and the air to be taken in from outside air or outside air to inside air. It can be switched to.
Such an inside / outside air switching device includes a case having an inside air introduction port and an outside air introduction port, and a damper that selectively closes the inside air introduction port and the outside air introduction port, and the inside air introduction port is closed by the damper. In this case, outside air is taken into the case, and inside air is taken into the case when the outside air inlet is closed by the damper. And the conditioned air is produced | generated when the air taken in in the case is temperature-controlled by the vehicle air conditioner.

Now, when the air taken into the vehicle air conditioner is inside air, the temperature of the air that has been temperature-adjusted first and supplied to the passenger compartment is re-adjusted, except for the initial stage of operation. For this reason, the temperature of the air taken in is close to the set temperature, and the amount of energy required in the vehicle air conditioner to generate conditioned air is small.
On the other hand, when the air taken into the vehicle air conditioner is outside air, the temperature of the air taken in is generally far from the set temperature, and the amount of energy used to generate conditioned air at the set temperature. A lot is needed. Here, in the case where the amount of energy cannot be ensured due to restrictions such as a heater, the conditioned air cannot be adjusted to the set temperature.
Therefore, for example, as shown in Patent Document 1, a configuration is provided in which a gap is formed between the damper and the case when the outside air is taken into the case, and even when the outside air is taken into the case, There has been proposed an inside / outside air switching device that reduces the amount of energy required for generating conditioned air by taking a part into the case.

JP 2004-50962 A

  By the way, when air is taken into the case of the inside / outside air switching device, a blower attached to the inside / outside air switching device is driven to draw air into the case. While the vehicle air conditioner is operating, the blower is always driven in principle, and air is continuously supplied to the vehicle air conditioner. And while the blower is driven, the inside of the case is always in a negative pressure state. For this reason, when a gap is formed between the damper and the case, the inside air is always supplied from the gap into the case.

  However, when the air conditioner for vehicles is not in operation and the blower is stopped and the outside air inlet is open, the outside air flows into the case due to running of the vehicle or wind outside the vehicle. The ram pressure inside becomes high. When the ram pressure in the case increases, the outside air flows back to the inside air introduction port through the gap provided between the damper and the case, and the outside air flows into the vehicle interior unintentionally.

  The present invention has been made in view of the above-described problems. In the inside / outside air switching device, the outside air is prevented from flowing backward from a gap for taking a part of the inside air into the case and entering the vehicle interior. For the purpose.

The present invention adopts the following configuration as means for solving the above-described problems.
A first aspect of the present invention is a vehicle air conditioner comprising: a case having an outside air introduction port for introducing outside air; an inside air introduction port for introducing inside air; and a rotary damper that selectively closes the outside air introduction port and the inside air introduction port. When the rotary damper closes the inside air introduction port, the vehicle interior and the inside of the case are connected, and the influence of the ram pressure applied from the outside air introduction port when the vehicle travels is provided. A configuration is adopted in which a clearance channel that is always open is provided at a position that is not received.
According to a second invention, in the first invention, the gap flow path is a gap opened in a vehicle horizontal direction formed by an end portion forming the inside air inlet and an end portion of the rotary damper. Adopt the configuration.
According to a third aspect of the present invention, in the second aspect of the present invention, a configuration is adopted in which a flow path extending member is provided on the outside air inlet side of the gap flow path and extends the gap flow path.
According to a fourth aspect of the present invention, in the second or third aspect of the present invention, a configuration is provided in which a split member that divides the inside of the case is provided in a region to which the gap channel is connected and a region in which the outside air is introduced. .

According to the present invention, when the rotary damper closes the inside air introduction port, the clearance channel is formed at a position not affected by the ram pressure applied from the outside air introduction port when the vehicle travels. Further, the gap flow path is configured such that a gap is opened in the vehicle horizontal direction by an end portion forming the inside air introduction port and an end portion of the rotary damper.
For this reason, in order for the outside air introduced into the case to pass through the gap flow path and enter the inside air inlet, the flow direction is greatly changed by turning around from the inside to the outside of the rotary damper. Need arises. As a result, the gap flow path is difficult for the outside air inside the case to flow, and it is possible to prevent the outside air from flowing backward from the inside of the case to the inside air inlet through the gap flow path. It is possible to smoothly introduce the inside air from the gap channel while introducing the outside air.

It is a perspective view which shows schematic structure of the inside / outside air switching apparatus in 1st Embodiment of this invention. It is the sectional view on the AA line of FIG. It is a graph which shows the experimental result for demonstrating the effect of the inside / outside air switching device in 1st Embodiment of this invention. It is sectional drawing which shows schematic structure of the inside / outside air switching apparatus in 2nd Embodiment of this invention. It is sectional drawing which shows schematic structure of the inside / outside air switching apparatus in 3rd Embodiment of this invention.

  Hereinafter, an embodiment of an inside / outside air switching device according to the present invention will be described with reference to the drawings. In the following drawings, the scale of each member is appropriately changed in order to make each member a recognizable size.

(First embodiment)
FIG. 1 is a perspective view showing a schematic configuration of the inside / outside air switching device S1 of the present embodiment. 2 is a cross-sectional view taken along line AA in FIG.
The inside / outside air switching device S1 of the present embodiment is mounted on a vehicle, and is for selectively taking in the inside air in the vehicle interior or outside air outside the vehicle into the vehicle air conditioner. Switch to outside air or from outside to inside air.
As shown in FIG. 1, the inside / outside air switching device S <b> 1 of the present embodiment includes a case 1, a rotary damper 2, and a rotation lever 3.

  The case 1 forms the outer shape of the inside / outside air switching device S1 of the present embodiment, and accommodates the rotary damper 2 in a rotatable manner. The case 1 includes an inside air introduction port 1a for taking in the inside air that is air inside the vehicle interior, an outside air introduction port 1b for taking outside air that is outside the vehicle, and air that discharges the air taken inside. And an outlet 1c.

The inside air introduction port 1a is an introduction port that opens upward in the upper portion of the case 1 and is located in the vehicle interior. The outside air inlet 1b is an inlet that opens upward in the upper part of the case 1 in the same manner as the inside air inlet 1a and is connected to an engine room that communicates with the outside of the vehicle. As shown in FIGS. 1 and 2, the inside air introduction port 1 a and the outside air introduction port 1 b are provided on the top of the case 1 with the top portion 1 d interposed therebetween. The air outlet 1c is provided in the lower part of the case 1, and is connected to a blower unit that houses a blower that is driven when the vehicle air conditioner is operated.
Further, the case 1 has a shut rib 1e in contact with a later-described seal member 5 installed in the rotary damper 2 to isolate the outside air inlet 1b and the air outlet 1c. The shut rib 1e is provided on the inner wall of the case 1 below the outside air introduction port 1b, and comes into contact with the seal member 5 when the rotary damper 2 closes the outside air introduction port 1b.

  The rotary damper 2 selectively closes (that is, selectively opens) the inside air introduction port 1a and the outside air introduction port 1b. As shown in FIG. 2, the upper surface 2a is closed to make the inside hollow. It has a fan shape. Further, the rotary damper 2 is opened on the side of the inside air introduction port 1a and the side of the outside air introduction port 1b leaving the peripheral edges 2b and 2c, so that air can pass through the inside from the inside air introduction port 1a side and the outside air introduction port 1b side. It is configured.

As shown in FIG. 1, the rotary damper 2 is connected to a rotation lever 3 and a rotation shaft 4, and rotates about the rotation shaft 4 in accordance with the rotation of the rotation lever 3. More specifically, the rotary damper 2 has a posture in which the upper surface 2a faces the inside air introduction port 1a (the posture shown in FIGS. 1 and 2, hereinafter referred to as the inside air introduction port closing posture) and the upper surface 2a in the outside air introduction port 1b. It can be turned inside the case 1 between the opposing postures (hereinafter referred to as an outside air inlet closing posture).
When the rotary damper 2 is in the outside air inlet closing position, the seal member 5 provided on the peripheral edge 2b on the side of the outside air inlet 1b comes into contact with the shut rib 1e.

Moreover, each peripheral part 2b, 2c of the rotary damper 2 protrudes above the upper surface 2a as shown in FIG. And the sealing member 5 is affixed on the upper surface 2a side of the area | region where the peripheral part 2b protruded, the upper surface 2a side of the area | region where the peripheral part 2c protruded, and the back side.
The seal member 5 is in contact with the top 1d or the shut rib 1e of the case 1 to seal between the case 1 and the rotary damper 2. When the rotary damper 2 is in the inside air inlet closing position, as shown in FIG. 2, the seal member 5 affixed to the peripheral edge 2c comes into contact with the case 1, and the rotary damper 2 is in the outside air inlet closing position. In this case, the seal member 5 affixed to the peripheral edge 2b comes into contact with the case 1.

  The rotation lever 3 is for rotating the rotary damper 2 between the inside air inlet closing posture and the outside air inlet closing posture. The rotating lever 3 is installed outside the case 1 as shown in FIG. 1, and is connected to the rotating shaft 4 connected to the rotary damper 2 as described above. The rotation lever 3 is connected to an operation lever or a drive motor provided in the vehicle interior, and rotates when power is transmitted from the operation lever or the drive motor.

  Then, the inside / outside air switching device S1 of the present embodiment connects the vehicle interior and the inside of the case 1 and always opens as shown in FIG. 2 when the rotary damper 2 is in the inside air inlet closing position. 10 is provided. The gap channel 10 includes a peripheral portion 2b (end portion) of the rotary damper 2 in an inside air inlet closing position, and an end portion 1a1 (an end portion far from the outside air inlet port 1b) that forms the inside air inlet port 1a. Is formed in a position between the outside air introduction port 1b and the outside air introduced into the case from the outside air introduction port 1b. On the other hand, by introducing a part of the inside air, the energy required for the vehicle air conditioner is reduced.

In the inside / outside air switching device S1 of the present embodiment, as shown in FIG. 2, the peripheral portion 2b of the rotary damper 2 in the closed state of the inside air inlet and the inside air introduction located in the horizontal direction with respect to the peripheral portion 2b. A gap channel 10 is formed by being sandwiched between the end 1a1 forming the mouth 1a. The gap channel 10 is a channel that moves upward as a whole when going from the inside of the case 1 to the inside air inlet 1a.
On the other hand, the outside air introduced into the case 1 from the outside air introduction port 1b flows downward toward the air outlet 1c. That is, the flow of the outside air introduced into the case 1 is in a direction from obliquely upward to downward so as to go from the outside air inlet 1b to the air outlet 1c, as indicated by an arrow a in FIG.

  In the inside / outside air switching device S1 of the present embodiment configured as described above, when the vehicle air conditioner is operated and the blower is driven, the turning lever 3 is turned and the rotary damper 2 is introduced into the outside air. By adopting the mouth closed posture, the inside air is taken into the case 1 through the inside air introduction port 1a. The inside air taken into the case 1 is discharged to the outside of the inside / outside air switching device S1 of the present embodiment through the air outlet 1c.

Further, when the air conditioner for a vehicle is operated and the blower is driven, the rotary lever 3 is rotated and the rotary damper 2 is brought into the inside air inlet closing position, so that the outside air inlet 1b is interposed. The outside air is taken into the case 1.
At this time, since the inside of the case 1 is in a negative pressure state due to the drive of the blower, the inside air flows into the gap channel 10 through the inside air introduction port 1a, and a part of the inside air in the vehicle interior is inside the case 1. To be supplied. Then, air containing a large amount of outside air and a small amount of inside air is discharged to the outside of the inside / outside air switching device S1 of the present embodiment via the air outlet 1c.

On the other hand, when the air conditioner for vehicles is not operated and the blower is stopped and the rotary damper 2 is in the inside air inlet closing position, the outside air inlet 1b is open. The outside air flows into the case 1 due to the running of the vehicle and the wind outside the vehicle, and as a result, the ram pressure in the case 1 increases.
Here, in the inside / outside air switching device S1 of the present embodiment, the gap flow path 10 is opened in the vehicle horizontal direction by the end 1a1 that forms the inside air introduction port 1a and the peripheral edge 2b (end) of the rotary damper 2. It is formed to do. That is, the gap channel 10 is formed at a position that is not affected by the ram pressure applied from the outside air inlet 1b when the vehicle travels. When the outside air that has flowed into the case 1 travels from the inside of the case 1 toward the inside air inlet 1a, it is prevented from passing directly by the inner wall of the rotary damper 2.
For this reason, in order for the outside air introduced into the inside of the case 1 to pass through the gap channel 10 and enter the inside air introduction port 1a, it is necessary to go around and greatly change the flow direction. As a result, it becomes a region where the gap flow path 10 is difficult for the outside air inside the case 1 to flow, and it is possible to prevent the outside air from flowing back from the inside of the case 1 to the inside air introduction port 1a via the gap flow path 10.
That is, the inside / outside air switching device S1 of the present embodiment has a complicated structure in which the gap channel 10 is difficult to flow as viewed from the outside air flowing into the case 1 from the outside air inlet 1b. 10 is a labyrinth structure. For this reason, it is possible to suppress backflow of outside air from the inside of the case 1 to the inside air inlet 1a via the gap channel 10.

FIG. 3 is a graph showing the results of an experiment comparing the amount of outside air entering the vehicle interior through the gap flow path using the inside / outside air switching device S1 of the present embodiment and the conventional inside / outside air switching device. . In addition, as the conventional inside / outside air switching device, an inside / outside air switching device having a shape in which the gap flow path is directed to the downstream side of the flow of the outside air introduced into the case through the outside air introduction port was used. In FIG. 3, the horizontal axis indicates the ram pressure inside the case, the vertical axis indicates the amount of air entering the vehicle interior, the experimental result of the inside / outside air switching device S1 of the present embodiment is indicated by a broken line, and the conventional inside / outside air The experimental result of the switching device is shown by a solid line.
As shown in FIG. 3, the inside / outside air switching device S <b> 1 of the present embodiment was found to significantly reduce the rate of increase of the intruding air volume with respect to the increase in ram pressure, compared to the conventional inside / outside air switching device. . That is, it was found that the inside / outside air switching device S1 of the present embodiment can suppress the backflow of outside air into the vehicle interior as compared with the conventional inside / outside air switching device.

(Second Embodiment)
FIG. 4 is a cross-sectional view of the inside / outside air switching device S2 of the second embodiment, and is a cross-sectional view of the inside / outside air switching device S2 of the second embodiment cut at a position corresponding to the line AA of FIG. is there. In the description of the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. .

As shown in FIG. 4, the inside / outside air switching device S <b> 2 of the present embodiment includes a plate member 11 (flow path extending member) provided so as to protrude toward the outside with respect to the upper end portion of the peripheral edge portion 2 b of the rotary damper 2. I have.
This plate member 11 is disposed on the outside air inlet 1b side of the gap channel 10 when the rotary damper 2 is in the inside air inlet closing position (the attitude shown in FIG. 4), and extends the gap channel 10. In other words, an extended portion of the gap channel 10 is formed between itself and the end 1a1 that forms the inside air inlet 1a.

  According to the inside / outside air switching device S2 of this embodiment, as a result of the gap channel 10 being extended by the plate member 11, the pressure loss in the gap channel 10 increases, and the outside air inside the case 1 flows into the gap channel 10. It becomes difficult to flow in. Therefore, according to the inside / outside air switching device S2 of the present embodiment, it is possible to more reliably prevent the outside air from flowing backward.

  As shown in FIG. 4, the seal member 5 provided on the peripheral edge 2b of the rotary damper 2 also forms a part of the gap channel 10 between itself and the end 1a1 that forms the inside air inlet 1a. If the viewpoint is changed, it can be said that the gap channel 10 is extended. For this reason, it can be considered that the seal member 5 provided on the peripheral edge 2b of the rotary damper 2 also functions as the flow path extending member of the present invention.

(Third embodiment)
FIG. 5 is a cross-sectional view of the inside / outside air switching device S3 of the third embodiment, and is a cross-sectional view of the inside / outside air switching device S3 of the third embodiment cut at a position corresponding to the line AA in FIG. is there. In the description of this embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

As shown in FIG. 5, the inside / outside air switching device S3 of the present embodiment splits the inside of the case 1 into a region R1 to which the gap channel 10 is connected and a region R2 into which outside air is introduced ( Division member).
The divided plate member 12 is fixed to the inner wall of the case 1 on the back side and the near side in FIG. 5, and the rotary damper 2 when the rotary damper 2 is in the inside air inlet closing position (position shown in FIG. 5). The inside of the case 1 is divided into two regions R1 and R2 by contacting with the peripheral edge 2b.

  According to the inside / outside air switching device S3 of the present embodiment as described above, the outside air taken into the case 1 when the rotary damper 2 is in the inside air inlet closing posture does not once exit the air outlet 1c of the case 1. The gap channel 10 cannot be reached. Therefore, it becomes difficult for the outside air inside the case 1 to flow through the gap channel 10. Therefore, according to the inside / outside air switching device S3 of the present embodiment, it is possible to more reliably prevent the outside air from flowing backward.

  In the present embodiment, the configuration in which the divided member of the present invention is the divided plate member 12 has been described. However, the division member of the present invention is not necessarily a plate member, and may be a member having another shape.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  For example, in the above-described embodiment, the gap channel 10 forms the peripheral portion 2b of the rotary damper 2 in the internal air inlet closing position and the internal air inlet 1a positioned in the horizontal direction with respect to the peripheral portion 2b. The configuration formed by being sandwiched between the end portions 1a1 has been described. However, the present invention is not limited to this, and other modes are adopted as long as the gap flow path is formed at a position not affected by the ram pressure applied from the outside air introduction port when the vehicle travels. It is also possible.

  S1 to S3: Inside / outside air switching device, 1 ... case, 1a ... inside air introduction port, 1a1 ... end, 1b ... outside air introduction port, 2 ... rotary damper, 10 ... gap flow path, 11 ... ... Plate member (flow path extending member), 12 ... Divided plate member (divided member), R1 ... Area connected to the gap flow path, R2 ... Area where outside air is introduced

Claims (4)

An inside / outside air switching device for a vehicle air conditioner comprising: a case having an outside air introduction port for introducing outside air; a case having an inside air introduction port for introducing inside air; and a rotary damper that selectively closes the outside air introduction port and the inside air introduction port. Because
When the rotary damper closes the inside air introduction port, the gap between the vehicle interior and the inside of the case is connected, and the clearance channel always opens at a position not affected by the ram pressure applied from the outside air introduction port when the vehicle travels An inside / outside air switching device comprising:   2. The inside / outside air switching device according to claim 1, wherein the gap flow path is a gap opened in a vehicle horizontal direction formed by an end portion forming the inside air introduction port and an end portion of the rotary damper. .   The inside / outside air switching device according to claim 2, further comprising a channel extending member that is disposed on the outside air inlet side of the gap channel and extends the gap channel.   The inside / outside air switching device according to claim 2 or 3, further comprising a dividing member that divides the inside of the case into a region to which the gap flow path is connected and a region into which the outside air is introduced.

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