JP2003011640A - Inside and outside air switching device of air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inside and outside air switching device of an air conditioner for a vehicle capable of suppressing the increase in production man-hours to reduce a cost by effectively utilizing an existing installation port 8 for an inside air port for taking the inside air in a cabin into an air conditioner casing 2 in an outside air inlet mode. SOLUTION: An inside and outside air switching door 6 for switchingly and selectively opening and closing an inside air inlet port 5 is installed on an air conditioner casing 2. Also an outside air inlet port 4 and the existing installation port 8 for installing a filter 9 (internally installed equipment) by insertion is provided in the air conditioner casing 2 in communication with the inside air port. Accordingly, the inside air port can be provided when the installation port 8 is formed. Thus, as compared with a case when the inside air port 10 is formed separately, a cost-effectiveness can be increased without increasing the production man-hours to cope with a request for cost reduction frequently urged in recent years.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible wind pressure sheet which opens upward to open an inside air port for secondarily introducing the inside air in a vehicle compartment due to a negative pressure generated in an air conditioning casing during an air conditioning operation. The present invention relates to an inside / outside air switching device for a vehicle air conditioner.

[0002]

2. Description of the Related Art In an inside / outside air switching device for a vehicle air conditioner,
The inside / outside air switching door is operated to selectively switch between the inside air introduction mode and the outside air introduction mode depending on the air conditioning state inside the vehicle. Then, when the mode is switched to the outside air introduction mode, the sub door is opened as a wind pressure sheet by the negative pressure inside the air conditioning casing, and the inside air in the vehicle compartment is secondarily taken in and mixed into the outside air. As a result, the heating effect of the vehicle interior is not impaired in winter, and the cooling effect is not reduced particularly in summer, and the window glass in the vehicle interior is prevented from being fogged.

As an air conditioner for a vehicle having such a sub door, Japanese Utility Model Publication No. 58-16415 and Japanese Unexamined Patent Application Publication No.
There is one described in JP-A No. 01-39145. In Japanese Utility Model Publication No. 58-16415, a secondary air introduction port is provided as an internal air port in an evaporator case in which a cooling evaporator is installed, and the secondary air introduction port is opened and closed by a damper as a wind pressure sheet. Further, in Japanese Patent Laid-Open No. 2001-39145,
An opening is formed in the inside / outside air switching door that selectively switches between the inside air introduction port and the outside air introduction port, and is opened / closed by a sub door as a wind pressure sheet.

[0004]

However, in any of the above, it is necessary to separately form the inside air inlets such as the secondary air inlets and the openings in the evaporator case and the inside / outside air switching door. There is a risk that the number of man-hours will increase and the cost will rise.

The present invention has been made in view of the above circumstances, and an object thereof is to effectively use an existing mounting opening for inserting an internal device such as a filter by inserting an inside air opening for introducing the inside air. An object of the present invention is to provide an inside / outside air switching device for a vehicle air conditioner that can be formed rationally, does not increase the number of manufacturing steps, and is cost effective.

[0006]

[Means for Solving the Problems] (Claim 1) In an inside / outside air switching device for a vehicle air conditioner, an inside air inlet and an outside air inlet are selectively switched in an air conditioning casing in which a blower fan is arranged. With the inside / outside air switching door that opens and closes,
A mounting port for inserting and mounting an internal device such as a filter is provided adjacent to the inside air port. The cover has a guide port communicating with the inside air port, and is attached to the air conditioning casing so as to cover the mounting port. A flexible wind pressure sheet is provided between the cover and the air-conditioning casing, and when the air-conditioning operation is performed, it is rotated upward due to a difference in internal pressure of the air-conditioning casing and the internal air to open the internal air port.

As a result, during air-conditioning operation, especially when switching to the outside air introduction mode, the wind pressure seat is opened to secondarily take in the inside air from the inside air port and mix it into the outside air, without impairing the cooling and heating effect inside the vehicle interior. Especially in winter, it is possible to prevent the window glass in the passenger compartment from becoming frosted.

In this case, the inside air port opened and closed by the wind pressure seat is formed adjacent to the existing mounting port for inserting and installing the interior equipment. For this reason, the inside air port can be additionally provided at the time of forming the mounting port, the manufacturing man-hour is not increased, the cost becomes advantageous, and it is possible to cope with the demand for cost reduction which has been recently demanded.

(Claim 2) The cover has engaging claws through which the wind pressure sheet penetrates. When installing the cover,
The engaging claw is elastically engaged with the through hole formed in the air conditioning casing. As a result, the cover can be quickly attached to the air conditioning casing together with the wind pressure sheet by one-touch operation, and the cover can be attached easily and the assembly workability is greatly improved. Moreover, since the wind pressure sheet is configured to penetrate the engaging claw,
There is no need for a separate attachment member for attaching the wind pressure sheet, which is also advantageous in terms of cost.

(Claim 3) A hood member for restricting the upper limit rotation position of the wind pressure seat is formed integrally with the air-conditioning casing at the inner peripheral edge of the inside air opening. For this reason, compared with a case where a separate member is separately attached to the inside air port, it is advantageous in terms of cost and productivity is improved.

(Regarding Claim 4) The wind pressure sheet is formed of rubber or plastic into a rectangular shape having a thickness of 0.3 to 0.5 mm. For this reason, it is lightweight and has increased flexibility, and it quickly turns upward due to negative pressure, so that the inside air port can be opened with good responsiveness.

[0012]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional view showing a blower unit 1 of a vehicle air conditioner. An air blower fan 3 is provided inside the plastic air-conditioning casing 2 so as to face the bell mouth M, and an outside air introduction port 4 for introducing outside air (outside air) to the outside and an air inside the vehicle ( The inside air inlets 5 for introducing the inside air are formed respectively.

The air conditioning casing 2 is provided with an inside / outside air switching door 6 for selectively switching between the outside air introducing port 4 and the inside air introducing port 5 so as to be rotatable around a hollow support shaft 7. . The inside / outside air switching door 6 has a structure in which a base 6a is sandwiched between two flexible plastic plates 6b and 6c. The inside / outside air switching door 6 is rotationally driven by a driving mechanism (not shown) such as a servo motor through a manual operation of an occupant or a link mechanism (not shown) according to the air-conditioning condition in the passenger compartment. It

On the other hand, a mounting port 8 is formed on the outer side portion 2a of the air conditioning casing 2 so as to be located between the inside / outside air switching door 6 and the blower fan 3. A filter 9 as an interior device is arranged in the air conditioning casing 2 through the mounting port 8. The filter 9 filters and cleans the air (inside air, outside air) introduced into the air conditioning casing 2 when the blower fan 3 is driven, and blows the air into the passenger compartment.

As shown in FIG. 2, the air conditioning casing 2 is formed with an inside air inlet 10 for taking in the inside air of the vehicle compartment so as to be connected to the attachment opening 8 (an adjacent mode), and has a convex shape as a whole. It has an open structure. For this reason,
Are formed at the same time when the mounting opening 8 is formed. The cover 12 mounted so as to cover the mounting opening 8 includes a guide opening 11 communicating with the inside air opening 10.

The inner surface of the cover 12 is integrally formed so that an insertion rod 14 having an engaging claw 13 at its tip projects. A wind pressure sheet 15 is inserted into the insertion rod 14 through a hole 15a. Due to the negative pressure in the air conditioning casing 2, the wind pressure sheet 15 is deformed inward and rotated upward as described later. For this reason,
The wind pressure sheet 15 is made of a flexible material such as rubber or plastic having a rectangular shape and has a thickness of 0.3 to 0.5 mm and is lightweight.

Then, with the wind pressure sheet 15 inserted through the insertion rod 14, the engaging claws 13 of the cover 12 are elastically engaged with the through holes 16 formed in the air conditioning casing 2. Then,
The guide opening 11 communicates with the inside air opening 10, and the cover 12 covers the mounting opening 8 and is mounted on the air conditioning casing 2. Along with this, the wind pressure sheet 15 is sandwiched between the cover 12 and the outer side portion of the air-conditioning casing 2, and can be rotated up and down about the insertion rod 14 due to deformation. In this case, an arc-shaped hood member 17 that points toward the inside of the air conditioning casing 2 is integrally formed from the upper end of the inner peripheral edge portion of the inside air outlet 10, and regulates the upper limit rotational position of the wind pressure seat 15.
When the cover 12 is completely attached to the air-conditioning casing 2, the engaging claw 13 is caught on the inner peripheral edge of the through hole 16. Therefore, if the engaging claw 13 is strongly pulled outward, Moves away from the inner peripheral edge of the through hole 16 with elastic deformation.
Accordingly, the cover 12 can be detachably attached to the air conditioning casing 2.

In the above structure, in FIG. 1, the inside / outside air switching door 6 is in the outside air introduction mode in which the inside air introduction port 5 is closed and the outside air introduction port 4 is opened as shown by the solid line in FIG. Therefore, as the blower fan 3 is driven, the outside air is taken into the air conditioning casing 2 from the outside air inlet 4 as shown by the arrow A, passes through the filter 9 and the bell mouth M, and is passed through the vehicle as shown by the arrow D. It flows toward the room.

At this time, negative pressure is generated in the air-conditioning casing 2 by the outside air flowing in the air-conditioning casing 2, and a pressure difference is generated between the inside of the vehicle compartment and the inside. Therefore, the wind pressure sheet 15
1 is deformed and pivoted upward from the closed position shown by the solid line in FIG. 1 to open the inside air port 10 as shown by the chain double-dashed line. As a result, the inside air in the vehicle compartment is taken into the air conditioning casing 2 through the guide port 11 and the inside air port 10, as indicated by arrow C.

The inside air taken in through the inside air port 10 mixes with the outside air, passes through the filter 9 and the bell mouth M, and is blown out toward the passenger compartment as shown by an arrow D. As a result, the effect of cooling and heating in the passenger compartment is not impaired, and the window glass in the passenger compartment is prevented from being fogged especially in winter.

Further, depending on the condition of the air conditioning in the passenger compartment, etc., FIG.
When the inside / outside air switching door 6 is rotated in the direction indicated by arrow S from the above state, the inside air introduction port 5 is opened and the outside air introduction port 4 is closed, as shown by the two-dot chain line in the figure, to switch to the inside air introduction mode. Therefore, the inside air in the passenger compartment is fed from the inside air inlet 5 to
Is taken into the air-conditioning casing 2 as indicated by arrow B, passes through the filter 9 and the bell mouth M, and flows toward the vehicle interior as indicated by arrow D.

In this process, a negative pressure is generated in the air conditioning casing 2 and a pressure difference is generated between the inside and the inside of the vehicle compartment. For this reason,
As in the outside air introduction mode, the wind pressure sheet 15 rotates upward as shown by the chain double-dashed line in FIG. 1 to open the inside air port 10. As a result, the inside air of the passenger compartment is indicated by the arrow C,
It is introduced into the air conditioning casing 2 through the guide port 11 and the inside air port 10.

The inside air taken in through the inside air outlet 10 merges with the inside air, passes through the filter 9 and the bell mouth M, and is blown out toward the passenger compartment as indicated by an arrow D. In this inside air introduction mode, both inside air in the vehicle compartment is taken into the air conditioning casing 2 from the inside air inlet 5 and the inside air inlet 10 and merges. Therefore, in order to secure the same amount of inside air, the opening area of the inside air introduction port 5 can be reduced by the opening area of the inside air port 10 and the careless reduction in strength of the air conditioning casing 2 can be prevented.

As described above, during the air conditioning operation, particularly when the mode is switched to the outside air introduction mode, the wind pressure seat 15 is opened and the inside air in the vehicle compartment is secondarily taken in from the inside air port 10 and mixed into the outside air. As a result, the cooling and heating effect in the passenger compartment is not compromised,
In winter, the window glass in the passenger compartment is protected against fogging.

In this case, the inside air port 10 which is opened and closed by the wind pressure sheet 15 is formed in a state of being connected to the existing mounting port 8 for inserting and installing the internal equipment such as the filter 9. For this reason, the inside air port 10 can be additionally provided when the mounting port 8 is formed, which is advantageous in terms of cost without increasing the number of manufacturing steps, and can meet the demand for cost reduction that has recently been required.

In this embodiment, a filter 9 is used as an internal device installed inside the air conditioning casing 2 through the mounting port 8.
However, this internal equipment may be any equipment such as a heat exchanger that needs to be provided in the air conditioning casing 2.

The shape of the inside air port 10 is not limited to the rectangular shape,
Various shapes such as a triangle, a square, a circle, an ellipse or a polygon can be applied. The inside air port 10 may be formed in the vicinity of the mounting port 8 instead of being connected to the mounting port 8. Further, when attaching the cover 12, not only elastic engagement between the engaging claw 13 and the through hole 16 but also a fastening member such as a bolt and a nut or a screw (screw) may be used. In addition, various modifications can be made to the specific implementation of the present invention without departing from the scope of the present invention.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a blower unit of a vehicle air conditioner according to the present invention.

FIG. 2 is an enlarged exploded perspective view of a cover, a wind pressure seat, and an air conditioning casing in the blower unit.

[Explanation of symbols]

2 Air conditioning casing 3 blower fan 4 Outside air inlet 5 Inside air inlet 6 Inside / outside air switching door 8 mounting holes 9 Filter (interior equipment) 10 Inside air 11 Information Gate 12 covers 13 engagement claws 14 Insertion rod 15 Wind pressure sheet 16 through holes 17 Hood member

Claims (4)

[Claims] 1. An air-conditioning casing in which an intake air blower fan is arranged, and an inside-air inlet and an outside-air inlet are formed, and a rotatably provided inside the air-conditioning casing. An inside / outside air switching door that selectively switches between the inside air inlet and the outside air inlet to open and close, and mounting for inserting and attaching an interior device formed in the air conditioning casing and installed in the air conditioning casing. A mouth, an inside air opening formed in the air conditioning casing so as to be adjacent to the mounting opening, and a guide opening communicating with the inside air opening, and are attached to the air conditioning casing so as to cover the mounting opening. A cover, provided between the cover and the air conditioning casing,
A vehicle air conditioner including a flexible wind pressure seat that opens the inside air port and secondarily takes in the inside air in the vehicle compartment due to a pressure difference between the inside pressure of the air conditioning casing and the inside air during the air conditioning operation. Inside / outside air switching device. 2. The cover having a guide port communicating with the inside air port has an engaging claw that penetrates the wind pressure sheet,
The vehicle air conditioner according to claim 1, wherein the cover is attached to the air conditioning casing together with the wind pressure sheet by elastically engaging the engaging claw with a through hole formed in the air conditioning casing. Inside / outside air switching device. 3. A hood member, which regulates an upper limit rotational position of the wind pressure seat in the air conditioning casing, is formed integrally with the air conditioning casing at an inner peripheral edge portion of the inner air opening. The inside / outside air switching device of the vehicle air conditioner according to claim 1 or 2. 4. The wind pressure sheet is formed of rubber or plastic into a rectangular shape having a thickness of 0.3 to 0.5 mm, according to any one of claims 1 to 3. Inside / outside air switching device for vehicle air conditioners.