Vehicle duct structure

Abstract

To provide a duct of a vehicle which is capable of maintaining adequate sound absorption performance while pooling liquid.SOLUTION: A duct structure 5 of a vehicle comprises a duct 10 which is disposed on upstream side of a cooling fan 40 blowing toward a power storage stuck and includes an intake port which opens toward a passenger compartment and a sound absorption member 30 which is disposed within the duct. The duct includes a bottom wall part 120. The sound absorption member is disposed so that a clearance is provided between internal surface 120a of the bottom wall part and itself. The internal surface of the bottom wall part contains a flow path formation part 121 which forms a flow passage part 15 in which fluid L makes it possible to flow and a storage part formation part 122 which forms a storage part 16 which pools the liquid flowing the flow passage part in a portion facing the clearance. Distance between the storage part formation part and the sound absorption member is larger than distance between the flow path formation part and the sound absorption member and is provided with a step 123 between the storage part formation part and the flow path formation part.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a duct structure for a vehicle. [Background technology]

[0002] As a conventional duct structure for a vehicle, Japanese Patent Application Laid-Open No. 2016-117450 (Patent Document 1) discloses a structure in which a sound-absorbing member is arranged inside an intake duct so that a back space is formed between the inner wall of the intake duct and the sound-absorbing member. The back space can store liquid that has passed through the sound-absorbing member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-117450 Summary of the Invention [Problem to be solved by the invention]

[0004] The frequencies at which sound-absorbing materials can easily absorb sound vary depending on the thickness of the air layer in the back space. For this reason, in a configuration in which liquid is stored in the back space, as in Patent Document 1, the sound-absorbing performance changes depending on the amount of liquid stored in the back space. This raises concerns that it may be difficult to achieve both liquid storage and appropriate sound-absorbing performance.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and an object of the present disclosure is to provide a duct for a vehicle that can store liquid while maintaining appropriate sound absorption performance. [Means for solving the problem]

[0006] A duct structure for a vehicle according to the present disclosure includes a duct arranged upstream of a cooling fan that blows air toward an electric storage stack and having an air intake opening toward the vehicle cabin, and a sound-absorbing member arranged within the duct. The duct has a bottom wall portion. The sound-absorbing member is arranged to provide a gap between the sound-absorbing member and the inner surface of the bottom wall portion. The inner surface of the bottom wall portion includes, at a portion facing the gap, a flow path forming portion that forms a flow path portion through which liquid can flow, and a storage portion forming portion that forms a storage portion that stores liquid that has flowed through the flow path portion. The distance between the storage portion forming portion and the sound-absorbing member is greater than the distance between the flow path forming portion and the sound-absorbing member. A step is provided between the storage portion forming portion and the flow path forming portion.

[0007] According to the above-mentioned configuration, the liquid can be stored in the storage portion. Furthermore, by providing a step between the flow path forming portion and the storage portion forming portion, Flow path This prevents the liquid stored in the storage section from flowing back into the flow path section, thereby preventing the liquid from accumulating in the flow path section. This makes it possible to maintain a constant thickness of the air layer located in the gap between the flow path forming section and the sound-absorbing member, thereby maintaining appropriate sound-absorbing performance.

[0008] In the vehicle duct structure based on the present disclosure, the downstream opening of the duct, which is located downstream of the storage section and opens toward the cooling fan, may be located at a higher position than the storage section.

[0009] According to the above configuration, the downstream side of the duct opening is located higher than the reservoir, it is possible to prevent the liquid stored in the reservoir from entering the cooling fan.

[0010] In the duct structure for a vehicle according to the present disclosure, the duct may include a first portion extending along a first direction and a second portion located downstream of the first portion and extending along a second direction intersecting the first direction. The flow path forming portion and the reservoir forming portion may be provided in the second portion. The first portion may be provided with the intake port and an opening communicating with the second portion. The second portion may have a sidewall portion connecting the flow path forming portion and the opening. The sidewall portion may be provided with a guide portion that guides the liquid flowing through the first portion to the flow path forming portion.

[0011] According to the above configuration, the guide portion can guide the liquid to the flow path portion, thereby preventing the liquid from adhering to the sound absorbing member. [Effects of the Invention]

[0012] According to the present disclosure, it is possible to provide a duct for a vehicle that can store liquid while maintaining appropriate sound absorption performance. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a schematic diagram showing a vehicle according to an embodiment. [Figure 2] 2 is a diagram showing a duct structure and an electricity storage device of a vehicle according to an embodiment; [Figure 3] FIG. 3 is a schematic cross-sectional view taken along line III-III shown in FIG. [Figure 4] FIG. 3 is a schematic perspective view showing the inside of the duct structure shown in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments described below, identical or common parts are denoted by the same reference numerals in the drawings, and their description will not be repeated. In each drawing, the X-axis direction indicates the vehicle width direction, the Y-axis direction indicates the vehicle front-rear direction, and the Z-axis direction indicates the vehicle height direction.

[0015] 1 is a schematic diagram showing a vehicle according to an embodiment of the present invention, and a vehicle 100 according to the embodiment of the present invention will be described with reference to FIG.

[0016] Vehicle 100 is, for example, a hybrid vehicle that can run using the power of at least one of a motor and an engine, or an electric vehicle that runs using driving force obtained from electrical energy.

[0017] Vehicle 100 includes power storage device 1, rear seat 60, and floor panel 70. Power storage device 1 is disposed, for example, below rear seat 60. More specifically, power storage device 1 is disposed between the seat cushion of rear seat 60 and floor panel 70. The position of power storage device 1 is not limited to the above, and it can be disposed as appropriate as long as it can be cooled using the air within the vehicle cabin.

[0018] Fig. 2 is a diagram showing a duct structure of a vehicle and a power storage device according to an embodiment. Fig. 3 is a schematic cross-sectional view taken along line III-III shown in Fig. 2. Fig. 4 is a schematic perspective view showing the inside of the duct structure shown in Fig. 2. For convenience, sound-absorbing member 30 is omitted from Fig. 4. Details of duct structure 5 and power storage device 1 will be described with reference to Figs. 2 to 4.

[0019] As shown in Fig. 2, the energy storage device 1 has a longitudinal shape in the vehicle width direction. The energy storage device 1 includes a housing case 2 and an energy storage stack 3. The energy storage stack 3 is housed in the housing case 2. The energy storage stack 3 is configured by arranging a plurality of energy storage cells 4 side by side. The plurality of energy storage cells 4 are arranged side by side, for example, along the vehicle width direction.

[0020] The storage cell 4 is, for example, a secondary battery such as a nickel-metal hydride battery or a lithium-ion battery. The storage cell 4 has, for example, a rectangular shape. The storage cell 4 may use a liquid electrolyte or a solid electrolyte. The storage cell 4 may also be a unit capacitor configured to be able to store electricity.

[0021] As shown in FIGS. 2 to 4, the duct structure 5 includes a first duct 10, a second duct 20, and a sound absorbing member 30.

[0022] The second duct 20 is disposed downstream of the first duct 10. The second duct 20 connects the first duct 10 and the electricity storage device 1. A cooling fan 40 is disposed inside the second duct 20. The cooling fan 40 blows cooling air toward the electricity storage stack 3. For example, a sirocco fan or a propeller fan can be used as the cooling fan 40.

[0023] The first duct 10 is disposed upstream of the cooling fan 40 and guides air drawn in from the vehicle compartment to the cooling fan 40. The first duct 10 has an air intake port 10a that opens toward the vehicle compartment and a downstream opening 10b that opens toward the cooling fan 40.

[0024] The first duct 10 includes a first portion 11 and a second portion 12. The first portion 11 extends along a first direction. The first direction is, for example, a direction substantially parallel to the longitudinal direction of the vehicle. The first portion 11 is provided with an intake port 10a and an opening 10c that communicates with the second portion 12.

[0025] The second portion 12 extends along a second direction intersecting the first direction. The second direction is, for example, a direction substantially parallel to the vehicle width direction. The second portion 12 connects the first portion 11 and the second duct 20. A sound-absorbing member 30 is disposed inside the second portion 12. The second portion 12 is provided with the downstream opening 10b described above.

[0026] The second portion 12 has a bottom wall portion 120 and a side wall portion 130. The bottom wall portion 120 faces the sound absorbing member 30. The bottom wall portion 120 is located below the sound absorbing member 30. A gap is formed between the bottom wall portion 120 and the sound absorbing member 30.

[0027] The bottom wall portion 120 has an inner surface 120a. The inner surface 120a includes, in a portion facing the gap, a flow path forming portion 121 and a reservoir portion forming portion 122. The flow path forming portion 121 forms a flow path portion 15 through which the liquid can flow.

[0028] The reservoir forming portion 122 forms the reservoir 16 that stores the liquid that has flowed through the flow path portion 15. The downstream opening 10b is located at a higher position than the reservoir 16.

[0029] The reservoir forming section 122 is disposed downstream of the flow path forming section 121, and is located at a position lower in height than the flow path forming section 121. A step 123 is provided between the reservoir forming section 122 and the flow path forming section 121.

[0030] The side wall 130 is provided to stand upward from the end of the flow path forming portion 121 located on the first portion 11 side. The side wall 130 connects the flow path forming portion 121 and the opening 10c. The side wall 130 is provided with a guide portion 131 that guides the liquid flowing in the first portion 11 to the flow path forming portion 121. The guide portion 131 is configured, for example, as a recess that is recessed toward the intake port 10a side. A gap is formed between the recess and the sound absorbing member 30, so that the liquid flowing in the first portion 11 can be guided to the flow path forming portion 121 via the gap.

[0031] The sound-absorbing member 30 is made of any sound-absorbing material. For example, the sound-absorbing member 30 may be made of inorganic fibers such as glass wool or rock wool, metal fiber materials such as aluminum fibers, synthetic resin foams such as polystyrene resins or polyethylene resins, soft urethane or rubber materials, porous materials, etc. The sound-absorbing member 30 may also be made of a composite or laminate of various appropriate materials including the above-mentioned materials.

[0032] As described above, the sound absorbing member 30 is arranged so as to provide a gap between it and the inner surface 120a of the bottom wall portion 120. Specifically, for example, the sound absorbing member 30 is arranged above the flow path forming portion 121 so as to be substantially parallel to the flow path forming portion 121. The sound absorbing member 30 is arranged above the storage portion forming portion 122 so as to be inclined upward toward the downstream side. The distance between the storage portion forming portion 122 and the sound absorbing member 30 is greater than the distance between the flow path forming portion 121 and the sound absorbing member 30.

[0033] 3, when liquid L enters intake port 10a from the vehicle interior or when condensation occurs inside duct 10, liquid L passes through first portion 11 and is guided onto flow path forming portion 121. Liquid L guided onto flow path forming portion 121 passes through flow path portion 15 formed in the gap between flow path forming portion 121 and sound absorbing member 30, is introduced onto reservoir forming portion 122, and is stored in reservoir 16.

[0034] As described above, a step 123 is provided between the flow path forming section 121 and the storage section forming section 122. This prevents the liquid L from flowing back from the storage section 16 to the flow path section 15, thereby preventing the liquid from accumulating in the flow path section 15. This makes it possible to keep the thickness of the air layer located in the gap between the flow path forming section 121 and the sound absorbing member 30 constant, thereby maintaining appropriate sound absorption performance.

[0035] Furthermore, since the downstream opening 10b of the first duct 10 is located higher than the reservoir 16, the liquid L stored in the reservoir 16 can be prevented from entering the cooling fan 40.

[0036] In addition, when the liquid L moves from the first portion 11 to the flow path portion 15, the movement is guided by the guide portion 131, so that adhesion of the liquid L to the sound absorbing member 30 can be suppressed.

[0037] The embodiments disclosed herein are illustrative in all respects and are not restrictive. The scope of the present invention is defined by the claims, and includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0038] 1 Energy storage device, 2 Housing case, 3 Energy storage stack, 4 Energy storage cell, 5 Duct structure, 10 First duct, 10a Intake port, 10b Downstream opening, 10c Opening, 11 First portion, 12 Second portion, 15 Flow path portion, 16 Storage portion, 20 Second duct, 30 Sound absorbing member, 40 Cooling fan, 60 Rear seat, 70 Floor panel, 100 Vehicle, 120 Bottom wall portion, 120a Inner surface, 121 Flow path forming portion, 122 Storage portion forming portion, 123 Step, 130 Side wall portion, 131 Guide portion.

Claims

1. a duct that is disposed upstream of a cooling fan that blows air toward the power storage stack and has an air intake opening that opens toward the vehicle interior; a sound absorbing member disposed within the duct, The duct has a bottom wall portion, the sound absorbing member is disposed so as to provide a gap between the sound absorbing member and the inner surface of the bottom wall portion, the inner surface of the bottom wall portion includes, in a portion facing the gap, a flow path forming portion that forms a flow path portion through which a liquid can flow, and a reservoir forming portion that forms a reservoir portion that stores the liquid that has flowed through the flow path portion; a distance between the reservoir formation portion and the sound absorbing member is greater than a distance between the flow path formation portion and the sound absorbing member; a step is provided between the reservoir forming portion and the flow path forming portion, the duct includes a first portion extending along a first direction and a second portion located downstream of the first portion and extending along a second direction intersecting the first direction; the flow path forming portion and the reservoir forming portion are provided in the second portion, The first portion is provided with an opening communicating with the intake port and the second portion, the second portion has a sidewall portion connecting the flow path forming portion and the opening portion, A duct structure for a vehicle, wherein the side wall portion is provided with a guide portion configured by a recess that guides the liquid flowing through the first portion to the flow path forming portion and is recessed toward the intake port side.

2. 2. The duct structure for a vehicle according to claim 1, wherein a downstream opening of the duct, which is provided downstream of the storage portion and opens toward the cooling fan, is located at a higher position than the storage portion.

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