Inside air/outside air switching device

Inactive Publication Date: 2010-01-14
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]The invention provides an inside air / outside air switching device that has a first inside air inlet, a second inside air inlet, and an outside air inlet, and that is structured in such a manner that noise that leaks into a vehicle compartment through the second inside air inlet is minimized.
[0010]According to the aspect of the invention described above, the noise that is generated in the engine room and enters the inside air / outside air switching case is blocked out by the noise insulation member. With this structure, even if the second inside air inlet is open, the noise that leaks into the vehicle compartment is minimized.
[0012]The noise that is generated in the engine room and enters the inside air / outside air switching case through the outside air inlet proceeds toward the second inside air inlet through the spaces. However, a labyrinth structure is formed because the spaces are small. Therefore, the noise that leaks into the vehicle compartment through the second inside air inlet is minimized.
[0014]The noise that is generated in the engine room and enters the inside air / outside air switching case through the outside air inlet proceeds toward the second inside air inlet through the spaces. However, a labyrinth structure is formed because the spaces are small. Therefore, the noise that leaks into the vehicle compartment through the second inside air inlet is minimized.
[0016]With this structure, the noise that is generated in the engine room and enters the inside air / outside air switching device through the outside air inlet is blocked out by the noise insulation member that has the substantially L-shaped cross section. Therefore, the noise that leaks into the vehicle compartment through the second inside air inlet is minimized.
[0017]Side plates may be provided at respective longitudinal ends of the noise insulation member, and each of the side plates may connect one of the side portions to the other side portion. With this structure, the noise that leaks into the vehicle compartment is minimized more reliably because the length of the spaces in the depth direction is increased.

Problems solved by technology

Therefore, engine noise may enter the inside air / outside air switching device through the outside air inlet and then leak into a vehicle compartment through the second inside air inlet.

Method used

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  • Inside air/outside air switching device

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first embodiment

[0028]Hereafter, an inside air / outside air switching device according to the invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a view schematically showing the overall structure of the inside air / outside air switching device. FIG. 2 is a perspective view showing the appearance of a noise insulation member. FIG. 3 is a partially-cutout perspective view showing the inside air / outside air switching device. FIG. 4 is a front view showing the state in which an inside air introduction support door is fitted.

[0029]As shown FIGS. 1 to 3, the inside air / outside air switching device according to the first embodiment of the invention includes an inside air / outside air switching case 10 and an air blasting unit 20. The inside air / outside air switching device is provided at the front portion of a vehicle compartment of a vehicle. The inside air / outside air switching device is arranged below a dashboard and on the side of a front passenger seat. The inside air / outside air swit...

fourth embodiment

[0083]Accordingly, a space S2 is left between the lower end of the side portion 19b of the noise insulation member 19 according to the invention and an upper plate 24a of the casing 24 of the air blasting unit 20. The space S2 is larger than the small space S1.

[0084]The space S2 according to the fourth embodiment of the invention is set in such a manner that the intake air introduced into the inside air / outside air switching case 10 through the second inside air inlet 17 flows toward the inlet 21 of the casing 24. Therefore, when the second inside air inlet 17 is opened in response of a change in the pressure in the inside air / outside air switching case 10, the intake air introduced into the inside air / outside air switching case 10 through the second inside air inlet 11 is drawn by the blast fan 22.

[0085]With the inside air / outside air switching device having the structure described above, the noise that is generated in the engine room that enters the inside air / outside air switchin...

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Abstract

An inside air / outside air switching device that includes: an inside air / outside air switching case that has an outside air inlet which opens into an engine room, a first inside air inlet and a second inside air inlet which open into a vehicle compartment; an inside air / outside air switching door that is provided in the inside air / outside air switching case, and that switches an open inlet between the first inside air inlet and the outside air inlet; an inside air introduction support door that opens and closes the second inside air inlet; and a noise insulation member that is provided in such a manner that an operation of the inside air introduction support door is not interfered with, and that blocks out noise which is generated in the engine room and which proceeds from the outside air inlet toward the second inside air inlet when the outside air inlet is open.

Description

INCORPORATION BY REFERENCE[0001]The disclosure of Japanese Patent Application No. 2008-180517 filed on Jul. 10, 2008 including the specification, drawings and abstract is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates generally to an inside air / outside air switching device that has a first inside air inlet and a second inside air inlet which open into a vehicle compartment, and an outside air inlet which opens into an engine room, and more specifically to a technology for minimizing noise that leaks from the engine room into the vehicle compartment through the second inside air inlet.[0004]2. Description of the Related Art[0005]An inside air / outside air switching device of the above-mentioned type is described in, for example, Japanese Patent Application Publication No. 2002-137621 (JP-A-2002-137621). In the inside air / outside air switching device, a second inside air inlet is formed at a positio...

Claims

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Application Information

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IPC IPC(8): F24F7/00
CPCB60H1/00685B60H2001/006B60H1/00849
InventorKAWATO, YOSHIAKIFEDERICO, DONALD
OwnerTOYOTA JIDOSHA KK