JP7446902B2 - vehicle blowing device - Google Patents

Description

The present invention relates to a blow-off device for a vehicle, and more particularly to a blow-off device for a vehicle that is equipped with a blow-off port that can adjust the amount of air blown.

BACKGROUND ART Conventionally, vents for vehicles (for example, automobiles) that allow the amount of air to be blown by a passenger to operate (for example, rotate) an operating part have been widely known.

As such an air outlet, for example, there is one (register) described in Patent Document 1.
The air outlet of Patent Document 1 is
A tubular body (an upper body part and a lower body part) that forms a ventilation path and an outlet for air conditioning;
two flaps (a first flap and a second flap) each extending upstream from the damper shaft so as to be rotatable about the damper shaft extending across the ventilation path upstream from the outlet of the ventilation path;
An adjustment mechanism (operation knob) that is placed in a position where the passenger can operate it and controls the rotation of the two flaps.
Equipped with
The tubular body has an upstream part upstream from the damper axis (top flow part and bottom upstream part), and an inclined part from the downstream part downstream from the damper shaft (top downstream part and bottom downstream part) to the outside of the ventilation passage. (top slope and bottom slope), and when the two flaps are in the closed position, their tips touch the slope,
There are some that are configured like this.

According to the air outlet of Patent Document 1 configured in this way, when the two flaps are moved to the closed position, the tip of each flap is configured to make surface contact with the inclined portion of the tubular body. Therefore, it is possible to suppress problems such as the distal end sliding during occlusion and causing abnormal noise.

JP2018-016228A

By the way, such a conventional air outlet has a structure in which when an occupant quickly operates an operating section (for example, an operating knob) in a predetermined direction, an opening/closing section such as a flap is suddenly closed.

In such a case, the pressure of the air conditioning air in the air supply path (duct) will rise rapidly, which will cause unpleasant noises (hitting noises) from the air outlet and air supply path, and in some cases, the effects of pressure fluctuations may occur. As a result, there is a risk that the air supply path and the air outlet (hereinafter referred to as "blowing device related members") may be damaged.

In this regard, although the air outlet of Patent Document 1 is configured to suppress the abnormal noise that occurs when the opening/closing part is moved to the closed position, it does not suppress the abnormal noise that occurs when the opening/closing part is suddenly closed. Since no consideration was taken, it can be said that there is still room for improvement.

The present invention has been made to solve these problems, and it alleviates the pressure fluctuations in the air supply path that occur when the opening/closing part is suddenly closed, thereby preventing the generation of abnormal noise and the blowing device related parts. An object of the present invention is to provide a blowing device for a vehicle that can suppress breakage and damage to the vehicle.

The above problem can be solved by a vehicle blow-off device according to the present invention, which is equipped with a blow-off port for blowing out air-conditioning air into a vehicle interior space, and an air supply path that guides the air-conditioning air toward the blow-off port. In the device, the air outlet is provided between an air inflow part connected to the air supply path, an air outlet opening opening into a vehicle interior space, and the air inlet part and the air outlet opening, and the air outlet is provided between the air inflow part and the air outlet opening. an opening/closing part that is movable between a fully closed position that blocks the flow of air for air conditioning and a fully open position that opens the blow-off opening at a predetermined opening degree, and the air supply path an air escape part that is provided so as to protrude outward at an end side in the blowing direction of the air circulation part, and is capable of taking in and storing air conditioning air in the air circulation part; It is solved by having.

In the present invention having the above configuration, when the pressure fluctuation of the air conditioning air occurs in the air circulation section due to the sudden closing of the opening/closing section, a part of the air conditioning air whose pressure has increased is transferred to the air escape section. It is configured to be inflow.

That is, in the present invention, when the pressure of the air conditioning air increases in the air circulation section, the pressure can be effectively absorbed by the air escape section, so that the peak value of the pressure when the pressure of the air conditioning air fluctuates can be reduced. It is possible to lower it.

As a result, in the present invention, it is possible to alleviate the pressure fluctuations in the air circulation section that occur when the opening/closing section is suddenly closed, thereby effectively suppressing the occurrence of abnormal noise and breakage/damage of "blowing device related parts". It is possible to do so.

In the invention related to the blowing device for a vehicle, it is preferable that at least a portion of the air escape portion is formed of a member that can be expanded and deformed.

Further, in the invention related to the blowing device for a vehicle, the air escape portion includes a blowing side attachment portion for attaching the air inflow portion to an end portion in the blowing direction, and a blowing side mounting portion in a counter blowing direction opposite to the blowing direction. It is preferable to have a counter-blowing side attachment part for attaching the air circulation part to an end of the airflow part.

In this case, the outlet side attachment part has a shape that allows the air inflow part to be inserted into the air inflow part, and the air inflow part is attached to the opposite outlet side attachment part in a state where the outlet and the air escape part are assembled. It is more preferable that the air escape section is disposed with a gap between them, and the air escape section takes in air conditioning air through the gap.

Furthermore, it is preferable that the air outlet has an operation part that is connected to the opening/closing part and can change the opening/closing position of the opening/closing part by an operation by a passenger.

As described above, according to the vehicle blowing device according to the present invention, although it has a relatively simple configuration, it is possible to alleviate the pressure fluctuation of air conditioning air that occurs when the opening/closing part is suddenly closed. , it is possible to reliably suppress the occurrence of abnormal noise and breakage/damage of "blowing device related members".

It is a perspective view of the air outlet concerning this embodiment. FIG. 2 is an exploded perspective view showing a connected state of the operating section of the air outlet and the shut damper in FIG. 1; FIG. 2 is a partially cross-sectional schematic diagram for explaining the operation of the blowing device according to the present embodiment. FIG. 2 is a partially cross-sectional schematic diagram for explaining the operation of a conventional blowing device as a comparative example. It is a graph showing changes in pressure within the air circulation section.

Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 1 is a perspective view of the air outlet according to the present embodiment, FIG. 2 is an exploded perspective view showing the connection state of the operation part of the air outlet and the shut damper in FIG. 1, and FIG. FIG. 4 is a partial cross-sectional schematic diagram for explaining the operation of a conventional blowing device as a comparative example, and FIG. 5 is a graph showing changes in pressure within the air circulation section. In addition, in the following explanation, the left and right direction refers to the left and right direction when facing the front of the vehicle, the blowing direction refers to the direction in which air conditioning air flows, the counter blowing direction refers to the direction opposite to the blowing direction, and the downstream side refers to the direction in which air conditioning air flows. The upstream side refers to the side in the blowing direction, and the upstream side refers to the side in the opposite blowing direction.

(Configuration of blowout device 1)
As shown in FIGS. 1 to 3, the blowing device 1 according to the present embodiment is a device installed in an automobile, and includes a blowing outlet 10 and an air supply path 50. Note that the blowing device 1, the automobile, the blowing outlet 10, and the air supply path 50 are respectively referred to as "blowing device", "vehicle", "blowing outlet", and "blowing outlet" in the claims. "air supply path".

(Configuration of air outlet 10)
First, the air outlet 10 will be explained with reference to FIGS. 1 to 3.
Note that the air outlet 10 according to the present embodiment has the same configuration as the register described in JP-A No. 2018-0166228 (hereinafter referred to as "known register"); For the sake of simplicity, an overview will be provided below.

As shown in FIGS. 1 to 3, the air outlet 10 is attached to, for example, an instrument panel placed in front of the driver's seat or passenger's seat, and supplies air-conditioning air supplied from the air supply path 50 to the interior of the vehicle ( This is a device for blowing out air (into the vehicle interior). Note that the above-mentioned air-conditioning air corresponds to "air-conditioning air" described in the claims.

The outlet 10 includes an outlet main body 11 , a plurality of downstream fins 21 , a plurality of upstream fins 22 , a shut damper 30 , and an operating section 40 . Note that the shut damper 30 and the operating section 40 correspond to an "opening/closing section" and an "operating section" in the claims, respectively.

(Air outlet body 11)
The outlet main body 11 is made of a tubular member having a substantially rectangular cross section, and includes an air inflow section 11A connected to the air supply path 50, and an outlet opening that blows out the air conditioning air that has flowed in from the air inflow section 11A into the vehicle interior space. It has a section 11B. Although not shown in the drawings, a bearing part (for example, a hole part) for pivotally supporting the plurality of downstream fins 21, the plurality of upstream fins 22, and the shut damper 30 is provided at a predetermined position of the outlet main body 11. It is provided. Note that the air inflow portion 11A and the blowout opening 11B correspond to the “air inflow portion” and the “blowout opening” in the claims, respectively.

Although details will be described later, in this embodiment, the air outlet 10 and the air supply path 50 are connected by inserting the air inflow section 11A into the air supply path 50 (downstream connecting section 56B of the air escape section 56, which will be described later). (See Figure 3).

(Downstream fin 21)
The downstream fin 21 is a member used to change the vertical angle of the air conditioning air blown out from the blowout opening 11B. The downstream fin 21 according to the present embodiment is made of a plate-like member extending in the left-right direction, and is arranged at a position close to the blow-off opening 11B of the blow-off outlet main body 11.

The plurality of downstream fins 21 each have a shaft portion 21a at both ends in the left and right direction, and by inserting these shaft portions 21a into a bearing portion (not shown) of the air outlet body 11, the downstream fins 21 are attached to the air outlet body 11. , are rotatably supported at a predetermined interval in the vertical direction.

Further, the plurality of downstream fins 21 are connected to each other via a link member 23 made of a plate-like member or the like. This link member is rotatably attached to a predetermined portion (for example, one end in the left-right direction) of each downstream fin 21 (see FIG. 2). Thereby, when one downstream fin 21 is tilted in the vertical direction, the other downstream fins 21 can also be moved to have the same inclination (substantially parallel).

Further, the downstream fin 21 located at the center in the vertical direction among the plurality ("3" in this embodiment) of the downstream fins 21 has a register described later in the center in the horizontal direction, similar to the "known register". A long hole 21b into which the operating shaft 42 of the operating section 40 can be inserted is formed. This elongated hole 21b extends in the left-right direction and is formed to penetrate along the orientation direction of the downstream fin 21.

As will be described in detail later, the operating shaft 42 is made of a rod-shaped member, and transmits the rotational force input from one end (the knob 41 side) as a free end to the other end (bevel gear on the operating section side) as a fixed end. 43 side) to open and close the shut damper 30 by the rotational force. This operating shaft 42 has two adjustable joints (downstream adjustable joint 42a and upstream adjustable joint 42b) in its shaft, and can move the free end side (knob section 41 side) in the vertical and horizontal directions. It is configured so that it can be done.

Therefore, in this embodiment, by operating the free end side (knob portion 41 side) of the operating shaft 42 inserted into the elongated hole 21b upward or downward, the downstream fin 21 can be tilted in the vertical direction. is possible.

(Upstream fin 22)
The upstream fin 22 is a member used to change the angle in the left-right direction of the air-conditioning air blown out from the blow-off opening 11B. The upstream fin 22 is made of a plate-like member that extends in the vertical direction, and is disposed closer to the air inlet portion 11A (upstream) than the downstream fin 21.

Like the downstream fins 21, the plurality of upstream fins 22 each have a shaft portion (not shown) at both ends in the vertical direction, and these shaft portions are inserted into a bearing portion (not shown) of the outlet body 11, etc. By doing so, it is rotatably supported with respect to the outlet main body 11 at a predetermined interval in the left-right direction.

Although not shown, the plurality of upstream fins 22 are connected to each other via a link member (for example, a rod) for tilting them at the same inclination, similarly to the downstream fins 21 (see FIG. 2). (See "link member 23" connected to "downstream fin 21"). Thereby, when one upstream fin 22 is tilted in the left-right direction, the other upstream fins 22 can also be moved to have the same inclination (substantially parallel).

Furthermore, in the present embodiment, an operating shaft 42 of an operating section 40 is connected to the upstream fin 22 (or link member). Thereby, by moving the free end (knob section 41) of the operating section 40 to the left or right, it is possible to change the blowing angle of the air conditioning air in the left and right direction.

(Shut damper 30)
The shut damper 30 is a member that is disposed upstream of the upstream fin 22 and opens and closes a passage between the air inflow section 11A and the blowout opening 11B.
The shut damper 30 according to the present embodiment includes a first flap 31 and a second flap 32 arranged below the first flap 31, which are formed in a plate shape, similar to the "known resistor". There is.

The downstream ends of the first flap 31 and the second flap 32 are connected like a hinge by a shaft member 33 extending in the left-right direction, and are arranged substantially parallel to the fully closed position C where they contact the inner surface of the outlet body 11. It is configured to be able to move between the fully open position O and the fully open position O. Note that the fully closed position C and the fully open position O correspond to a "fully closed position" and a "fully open position" in the claims, respectively.

As a result, when the first flap 31 and the second flap 32 are moved to the fully closed position C, the blowing of air-conditioning air from the blow-off opening 11B is stopped, while when they are moved to the fully-open position O, the blow-off opening is stopped. It is possible to blow out the air conditioning air from the section 11B at the maximum volume. Note that, considering that the first flap 31 and the second flap come into contact with the inner surface of the outlet main body 11 and thereby stop blowing out the air conditioning air, the outlet main body 11 of each flap is considered to be stopped. It is preferable that at least the portion in contact with the inner surface of the holder is made of a soft material with high adhesiveness (for example, rubber).

The first flap 31 is provided with a first bevel gear 31a that protrudes from the downstream end of the first flap 31 in the blowing direction at a position on the right side of the center in the left-right direction (FIGS. 2 and 3). reference). Similarly, the second flap 32 is provided with a second bevel gear 32a that protrudes from the downstream end of the second flap 32 in the blowing direction at a position to the left of the center in the left-right direction (see FIG. 3). ).
The first bevel gear 31a and the second bevel gear 32a are both arranged at a position where an operating section side bevel gear 43 of an operating shaft 42, which will be described later, meshes with the first bevel gear 31a and the second bevel gear 32a.

In this embodiment configured in this way,
(a) By rotating the operating shaft 42 in a predetermined direction (for example, clockwise), the first flap 31 and the second flap 32 can be moved toward the fully closed position C;
(b) By rotating the operating shaft 42 in a direction opposite to the predetermined direction (for example, counterclockwise), the first flap 31 and the second flap 32 can be moved toward the fully open position O;
It is configured as follows.

(Operation unit 40)
The operating unit 40 is configured to be operated by the passenger when changing the blowing direction and blowing air volume of the air conditioning air blown out from the blowing opening 11B, similar to a "known register". .
The operating unit 40 according to this embodiment includes a knob 41 that can be operated by an occupant holding the knob with his or her fingers, an operating shaft 42, and an operating unit side bevel gear 43.

The knob portion 41 is connected and fixed to the downstream end of the operating shaft 42 and is arranged on the downstream opening periphery of the elongated hole 21b of the downstream fin 21.

The operating shaft 42 is a rod-shaped member, and is a member for transmitting operating force such as rotational force input from the knob 41 to various members such as the shut damper 30.
As described above, the operating shaft 42 according to this embodiment has two universal joints (see "downstream universal joint 42a" and "upstream universal joint 42b" in FIG. 3) spaced apart from each other in the shaft. It is set up empty. Such a universal joint (also referred to as a "universal joint") is now well known, so a detailed explanation will be omitted, but in the downstream universal joint 42a and the upstream universal joint 42b according to this embodiment, one end side The rotational force input from one end can be transmitted to the other end even if the angle between the axial direction of the shaft and the axial direction of the other end is changed.

The downstream end of the operating shaft 42 is supported by the downstream fin 21 by being inserted into the elongated hole 21b of the downstream fin 21, and the upstream end of the operating shaft 42 is inserted into the long hole 21b of the downstream fin 21. It is fixed to the outlet main body 11 via an upstream joint part. Further, the downstream universal joint 42a is arranged downstream of the downstream fins 21 and the upstream fins 22, with the operating shaft 42 inserted into the elongated hole 21b.

The operating section side bevel gear 43 is fixed to the upstream end of the operating shaft 42 and is arranged to mesh with the first bevel gear 31a of the first flap 31 and the second bevel gear 32a of the second flap 32.

In this embodiment, since the operation unit 40 is configured in this way, the occupant can
(a) By tilting the knob 41 upward or downward, the downstream fin 21 can be moved in the vertical direction (the vertical angle of the air conditioning air blown out from the blowout opening 11B is changed) ) On the other hand,
(b) By moving the knob 41 leftward or rightward along the elongated hole 21b of the downstream fin 21, the upstream fin 22 can be moved in the left-right direction (air blows out from the blow-off opening 11B). (can change the horizontal angle of the air conditioning air), and
(c) By rotating the knob 41 clockwise or counterclockwise, the shut damper 30 can be moved between the fully closed position C and the fully open position O. (The volume of air being blown out for air conditioning can be adjusted.)
It is configured as follows. Note that in this embodiment, a single operating section (knob section 41) is configured to move the downstream fins 21, move the upstream fins 22, and open/close the shut damper 30. It is also possible to configure it so that it can be performed using separate operation units.

(Configuration of air supply path 50)
Next, the air supply path 50 according to this embodiment will be described with reference to FIGS. 1 and 3.
As shown in FIGS. 1 and 3, the air supply path 50 has an air circulation section 51 and an air escape section 56. Note that the air circulation section 51 and the air escape section 56 correspond to an "air flow path" and an "air escape section" in the claims, respectively.

(Air circulation part 51)
The air circulation part 51 is a conduit (duct) for guiding air-conditioning air led out from an air conditioner (not shown) to the outlet 10, and has approximately the same cross-sectional shape as the air inflow part 11A of the outlet 10 (the main one). In the embodiment, it has a rectangular cross section.

(Air escape part 56)
As will be described in detail later, this is a member for absorbing the pressure when the pressure of the air conditioning air inside the air circulation part 51 increases, and is formed of, for example, a relatively hard resin or steel plate.

The air escape portion 56 according to this embodiment has a substantially box shape, and is formed so that its cross-sectional area in a direction perpendicular to the blowing direction is larger than that of the air inlet portion 11A and the air circulation portion 51 of the blower outlet 10. has been done.
The upstream and downstream sides of the air escape section 56 include an upstream connecting section 56A for connecting the air circulation section 51 and a downstream connecting section for connecting the air inflow section 11A of the outlet 10, respectively. 56B is provided. Note that the upstream connecting portion 56A and the downstream connecting portion 56B correspond to the “anti-blowout side attachment portion” and the “blowout side attachment portion” in the claims, respectively.

The upstream connecting portion 56A is formed in a substantially cylindrical shape and is provided so as to protrude from the upstream end of the air escape portion 56 in the anti-blowing direction.
In this embodiment, since the air circulation part 51 and the air escape part 56 are connected by inserting the upstream connection part 56A into the air circulation part 51, the external shape of the upstream connection part 56A is , is formed to be slightly smaller than the inner surface shape of the air circulation part 51. Note that when the upstream connecting portion 56A is inserted into the air circulation portion 51, there may be a gap between them that causes air leakage. It can be treated by attaching an adhesive sheet (for example, duct tape).

Although details will be described later, in this embodiment, when the air outlet 10 and the air supply path 50 are assembled, there is a gap G between the outer circumferential surface of the air inflow section 11A and the inner circumferential surface of the upstream connecting section 56A. It is arranged so that the space is left open. Therefore, the inner surface shape of the upstream connecting portion 56A is formed to have a size equal to the outer surface shape of the air inflow portion 11A plus the gap G. Note that the gap G corresponds to the "gap" described in the claims.

The downstream connecting portion 56B is an opening formed at the upstream end of the air escape portion 56, and is formed in a size that allows the air inflow portion 11A to be inserted therein. This downstream connecting portion 56B has a flange portion 56Ba that protrudes from the opening periphery in the opposite direction to the blowout direction, and a seal portion 56Bb (for example, an annular rubber packing) attached to the inner surface of the flange portion 56Ba. .
The seal portion 56Bb is a member (for example, a rubber packing).

Here, the assembly of the air outlet 10 and the air supply path 50 will be explained.
(a) Inserting the upstream connecting portion 56A of the air escape portion 56 into the air circulation portion 51 to connect the air supply path 50 and the air escape portion 56;
(b) Next, insert the air inflow part 11A of the air outlet 10 into the downstream connection part 56B of the air escape part 56 to connect the air outlet 10 and the air escape part 56,
This can be done by following these steps.

In this embodiment, when the air outlet 10 and the air supply path 50 are assembled,
(a) A closed space S is formed between the outer surface of the air inflow section 11A and the inner surface of the air escape section 56, and
(b) A gap G (a gap formed between the upstream end of the air inflow section 11A and the upstream connection section 56A) is formed on the upstream side of the closed space S, which communicates with the closed space S.
It is configured as follows.

Since the closed space S communicates with the air circulation section 51 through the gap G, the air conditioning air in the air circulation section 51 can be stored at all times.

(Operation of blowing device)
Next, the behavior of pressure when pressure fluctuation occurs in the air supply path 50 of the blowing device 1 configured as described above will be described with reference to FIGS. 3 to 5.
In addition, in the following,
(a) Conditioning air is sent out at a constant air volume and pressure from an air conditioner (not shown);
(b) suddenly moving the shut damper 30 from the fully open position O to the fully closed position C (suddenly closing it);
The explanation will be based on the following premise.

As shown in FIGS. 3 and 5, when air-conditioning air is blown out from the blow-off opening 11B with the shut damper 30 in the fully open position O, the pressure in the air supply path 50 remains almost constant with almost no displacement. It is designed to change at the value of .

In this state, if the occupant quickly rotates the knob 41 in a predetermined direction (for example, clockwise) and suddenly moves the shut damper 30 from the fully open position O to the fully closed position C (suddenly closes it), the air conditioner Since the kinetic energy of the air for use is converted into pressure energy, the pressure within the air supply path 50 will rise rapidly starting near the upstream side of the shut damper 30 (see "t1" in FIG. 5). .

At this time, the air-conditioning air whose pressure has increased in the air circulation part 51 flows into the closed space S through the gap G, and the closed space S (which has a lower pressure than the air-conditioning air in the air circulation part 51) The air will be mixed with the air conditioning air inside.
That is, the pressure within the air circulation section 51 will be absorbed by the air conditioning air within the closed space S, and as a result, the rise in pressure within the air circulation section 51 will be suppressed (the peak value of the pressure will be lowered). ) (see "Pressure value P" in FIG. 5).

For example, as shown in FIG. 4, in a conventional blowing device 101 in which such a closed space S is not provided, when the shut damper 30 is suddenly closed, air conditioning air that has become high pressure near the upstream side of the shut damper 30 is released. is left as it is in the air circulation part 51, so the pressure in the air circulation part 51 rises to the pressure value Pt (peak value) (see FIG. 5), and a large abnormal noise ( (hitting sound) is likely to occur.

On the other hand, in the blowing device according to the present embodiment, the peak value of pressure can be significantly lowered than in the conventional blowing device 101, so it is possible to reliably suppress the occurrence of abnormal noise ( (See "Pressure value P" applied to the blowing device of this embodiment in FIG. 5 and "Pressure value Pt" applied to the conventional blowing device).

Note that, as shown in FIG. 5, the pressure inside the air circulation section 51 gradually decreases after reaching a peak value (see "pressure value P"), and then remains at a constant pressure value. It has become.

As described above, in this embodiment, when a sudden pressure fluctuation occurs in the air circulation section 51 due to the shut damper 30 being suddenly closed, a part of the air conditioning air whose pressure has increased is released. It is configured to flow into the closed space S of the section 56.

That is, in this embodiment, when the pressure of the air conditioning air increases in the air circulation part 51, the pressure can be effectively absorbed in the closed space S of the air escape part 56, so that the pressure of the air conditioning air increases. It is possible to lower the peak value of pressure during fluctuations to pressure value P.

As a result, in this embodiment, it is possible to alleviate pressure fluctuations within the air circulation section 51 that occur when the shut damper 30 is suddenly closed, and therefore, it is possible to reliably suppress the occurrence of abnormal noise, and in turn, the sudden It is also possible to suppress breakage and damage to the air outlet 10 and the air supply path 50 due to a pressure increase.

In addition, in the present embodiment, the air escape portion 56 (closed space S) is provided in a portion where the air conditioning air tends to have a high pressure when the shut damper 30 is suddenly closed, that is, an upstream portion of the shut damper 30 (air inflow portion 11A). , it is possible to effectively suppress an increase in the pressure of air conditioning air.

Furthermore, in this embodiment, the air escape part 56 has an upstream side connection part 56A (insertion port) that can be inserted into the air circulation part 51, and a downstream side connection part into which the air inflow part 11A of the outlet 10 is inserted. Since the portion 56B (opening) is provided, the air escape portion 56 can be assembled to the air outlet 10 and the air circulation portion 51 extremely easily.

In this embodiment, the air escape portion 56 is formed of a relatively hard member (for example, a steel plate and resin), but at least a portion thereof (for example, the side portion 56C of the air escape portion 56 (see FIG. 3)) It is also possible to form the member (for example, a rubber membrane) that can expand and deform when air conditioning air at a predetermined pressure acts (inflows) into the closed space S.

With this configuration, when high-pressure air conditioning air flows into the closed space S, a part of the air escape portion 56 (the side portion 56C of the air escape portion 56) can be bulged out, so that the closed space It is possible to absorb more of the pressure of the air-conditioning air in the S, and as a result, it is possible to further suppress the increase in the pressure of the air-conditioning air in the air circulation section 51.

For example, when the side portion 56C of the air escape portion 56 is made of a member such as a rubber membrane, the peak value of the pressure when the shut damper 30 is suddenly closed is determined by the pressure of the above embodiment, as shown by the dashed line shown in FIG. It is possible to set the pressure value Pe to be lower than the value P.
Therefore, according to such a configuration, it is possible to further suppress the generation of abnormal noise when the shut damper 30 is suddenly closed, and the resulting breakage and damage to the air outlet 10 and the air supply path 50.

Further, in the above embodiment, the shut damper 30 consisting of two flaps (the first flap 31 and the second flap 32) is used as the opening/closing part, but other opening/closing methods may be used as long as the opening/closing part can be quickly closed. (For example, a shutter-type opening/closing part) may be used.

Further, in the above embodiment, the shut damper 30 is mechanically opened and closed, but instead of this, an electrically opened and closed opening/closing section may be used.

Further, in the above embodiment, the air escape portion 56 has a shape that covers the entire outer periphery of the air inflow portion 11A of the air outlet 10, but it is also possible to have a shape that covers a part of the outer periphery of the air inflow portion 11A. .

Further, in the above embodiment, the air escape part 56 is configured to be directly connected to the air inflow part 11A of the air outlet 10, but for example, it may be provided in a pipe line at the downstream end of the air circulation part 51 to allow air to escape. It is also possible to connect indirectly to the inflow portion 11A.

Further, in the above embodiment, the air escape section 56 and the air circulation section 51 are configured as separate bodies, but it is also possible to form them integrally.

Further, in the above embodiment, the blowing device 1 is provided in an automobile, but it may be provided in another vehicle (for example, a train).

Although the embodiment to which the invention made by the present inventor is applied has been described above, the present invention is not limited to the description and drawings that form part of the disclosure of the present invention based on this embodiment. That is, it should be added that it goes without saying that all other embodiments, examples, operational techniques, etc. made by those skilled in the art based on this embodiment are included in the scope of the present invention.

1,101: Blower device, 10: Blower outlet, 11: Blower outlet body, 11A: Air inflow portion, 11B: Blower opening portion, 21: Downstream fin, 21a: Shaft portion, 21b: Long hole, 22: Upstream side fin, 23: link member, 30: shut damper, 31: first flap, 31a: first bevel gear, 32: second flap, 32a: second bevel gear, 33: shaft member, 40: operating section, 41: Knob section, 42: Operation shaft, 42a: Downstream side universal joint, 42b: Upstream side universal joint, 43: Operation section side bevel gear, 50: Air supply path, 51: Air circulation section, 56: Air escape section, 56A : Upstream side connection part, 56B: Downstream side connection part, 56Ba: Flange part, 56Bb: Seal part, 56C: Side part, C: Fully closed position, O: Fully open position, G: Gap, S: Closed space, P, Pt, Pe; pressure value

Claims (7)

an outlet that blows out air conditioning air into the vehicle interior;
an air supply path that guides air conditioning air toward the outlet;
A blowing device for a vehicle, comprising:
The air outlet is
an air inflow section provided at an upstream end and connected to the air supply path to allow conditioned air to flow in ;
an air outlet body that is a tubular member having an air outlet opening provided at the downstream end and opening into the vehicle interior space;
an opening/closing part that is provided inside the outlet main body and is movable between a fully closed position that blocks the flow of air conditioning air and a fully open position that opens the outlet opening at a predetermined opening degree;
has
The air supply path is
A conduit that guides air conditioning air to the outlet main body, the inner periphery of which has a cross-sectional shape at the downstream end such that the upstream end of the air inlet can be inserted into the downstream end. an air circulation part formed larger than the cross-sectional shape of the outer periphery;
A tubular member connected to the downstream end of the air circulation section, the air circulation section comprising: a counter-outlet side attachment section to which the air circulation section is connected; an outlet side attachment section to which the air inflow section is connected; and the air circulation section. a side portion formed to have a cross-sectional area in a direction perpendicular to the blowing direction larger than that of the air inflow portion and the air circulation portion so as to absorb the pressure when the pressure of the air conditioning air increases; an air escape section including;
has
The blow-out side attachment part has an opening into which the air inflow part is fitted and an outer circumferential surface of the air inflow part is fitted inside without a gap;
The air inflow part is fitted into the opening to form a closed space between the outer surface of the air inflow part and the inner surface of the side part, and the air inflow part forms a closed space between the outer surface of the air inflow part and the inner surface of the side part, and positioned so as to form a gap communicating with the closed space between the outer surface of the upstream end of the air inflow section and the inner surface of the anti-blowout side attachment section;
A blowing device for a vehicle characterized by the following. The air escape part is
at least a part of which is formed by a member capable of expanding and deforming;
The blowing device for a vehicle according to claim 1, characterized in that: A seal portion is provided on the inner surface of the opening to seal between the inner surface of the blow-out side attachment portion and the outer surface of the upstream end of the air inflow portion.
The blowing device for a vehicle according to claim 1 or 2, characterized in that: The air outlet is
an operating section connected to the opening/closing section and capable of changing the opening/closing position of the opening/closing section by an operation by a passenger;
The blowing device for a vehicle according to any one of claims 1 to 3 , characterized in that: The cross-sectional shape of the outer circumferential surface of the outlet main body is the same at least from the upstream end to the position where it fits into the opening.
The blowing device for a vehicle according to any one of claims 1 to 4, characterized in that: The opening/closing part is
a shaft member disposed inside the outlet main body and extending in a direction perpendicular to the blowout direction;
a first flap whose base end is connected to the shaft member and swings around the shaft member;
a second flap whose base end is connected to the shaft member and swings around the shaft member;
has
When in the fully open position, the tips of the first flap and the second flap are located upstream of the shaft member, and the tips of the first flap and the second flap are located inside the outlet main body. separated from the surrounding surface,
When in the fully closed position, the tips of the first flap and the second flap are located upstream of the shaft member, and the tips of the first flap and the second flap are located inside the outlet main body. in contact with the surrounding surface,
The distance between the tip of the first flap and the tip of the second flap increases from the fully open position to the fully closed position.
The blowing device for a vehicle according to any one of claims 1 to 5, characterized in that: The outlet main body fits into the opening downstream of a point where the tips of the first flap and the second flap contact each other,
The blowing device for a vehicle according to claim 6, characterized in that: