JPH01186414A - Outside/inside air intake device for car air-conditioner - Google Patents

Abstract

PURPOSE:To perform change-over intaking inside air or outside air simply and effectively by providing, in free turning movement, a cylindrical hollow damper having a one-fourth circumference on the upper surface of an air inlet in a scroll casing having a centrifugal fan inside thereof. CONSTITUTION:As a fan 2 is driven and a hollow damper 5 is turned, for example, to the right side limit by an actuator 7, a left side radial space S1 is full opened into an inside air intake mode. Then, inside air is taken in from the left side radial space S1, passing through a damper opening A and an inlet 1a of a casing 1, and is discharged from an outlet to be introduced into an air-conditioning unit. Besides, as the hollow damper 5 is turned to a left side limit, a right side radial space S2 is full opened into an outside air intake mode. Then, outside air is taken in from the right side radial space S2 and is introduced from the outlet to the air-conditioning unit.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air intake device for an air conditioner for an automobile.

[Conventional technology]

Conventionally, in automotive air conditioners, internal air inside the vehicle,
This allows for selective intake of outside air.

Various types of internal and external air intake devices of this type have been put into practical use. For example, Utility Model Publication No. 61-33279
, Japanese Unexamined Patent Publication No. 56-39912, etc., an inside/outside air switching box (intake duct) is provided with one or two inside air inlets and outside air inlets, and these outside air inlets are Opening/closing can be controlled using one or two switching dampers, or as disclosed in Japanese Utility Model Publication No. 62-33604, etc., the inside/outside air switching box is shaped like a hemisphere, and an inside air inlet is installed in this switching box. and an outside air inlet, and a spherical damper that slides along the inside of the spherical surface of the switching box.
Some devices introduce inside air and outside air by switching the inside and outside air introduction ports by sliding this spherical damper.

[Problem to be solved by the invention]

As mentioned above, conventional internal/external air intake devices employ a method in which an internal/external air intake and a switching damper are arranged in an internal/external air switching box, but in both cases, the size of the internal/external air switching box and the area of the internal/external air inlet Due to the restrictions, there is a natural limit to the amount of air intake, and inside/outside air switching boxes, switching dampers, etc. act as flow path resistance, which causes flow loss. Therefore, in response to the recent situation where higher static pressure and higher air volume are increasingly required due to the pursuit of comfort in vehicle interiors, conventional internal/external air switching devices cannot adequately meet these demands. Improvement was desired.

The present invention has been made in view of the above points, and its purpose is to reduce high static pressure in automobile air conditioners.
An object of the present invention is to provide a new internal/external air intake device capable of increasing air volume.

[Means to solve the problem]

In order to achieve the above object, the present invention takes the following measures from the viewpoint that the inside/outside air switching box, which greatly restricts the amount of air intake and causes resistance to the flow path, should be abolished. It is something.

That is, the present invention provides a scroll casing having an air inlet and an air outlet, a centrifugal fan rotating within the scroll casing, and a cylindrical fan having approximately 1/4 circumference or approximately 1/4 circumference.
/4 A hollow damper exhibiting a spherical shape, and the hollow damper is mounted on the surface of the scroll casing on the air inlet side via a drive mechanism so that its rotation locus forms a substantially semicircle above the air inlet. The hollow damper is provided so as to be rotatable, and both ends of the hollow damper in the rotation direction are opened, and a space between each of these openings and the scroll casing surface on the air inlet side prevents the left and right rotation of the hollow damper. Among these opening and closing spaces, the space that opens when the hollow damper is rotated in one direction is defined as an inside air introduction section, and the space that is opened when the hollow damper is rotated in the other direction is defined as an outside air introduction section. It becomes as.

[Effect]

According to the present invention having the above configuration, the hollow damper is approximately 1/2
The hollow damper has a cylindrical shape with a circumference of 4 or approximately 1/4 spherical, and both ends in the rotational direction of the hollow damper are open, so that the hollow damper is moved along a roughly semicircular trajectory on the scroll casing surface via a drive mechanism. By rotating it left and right as shown, air intake spaces (radial spaces) in two directions are formed on the scroll casing surface. For example, if the hollow damper is rotated in one direction left and right, the space between one opening of the hollow damper and the scroll casing surface will open, and the space between the other damper open end and the scroll casing surface will close. Conversely, if the hollow damper is rotated in the other direction, an operation opposite to the above operation will be performed. Then, if the space opened by the rotation of the hollow damper is defined as an air intake space, and one of these air intake spaces is defined as an inside air introduction section and the other space is defined as an outside air introduction section, the hollow damper can be By rotating the hollow damper in the left-right direction on the scroll casing surface, internal air, external air, or an internal/external mixture can be selectively introduced into the scroll casing depending on the rotational position of the hollow damper.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along line I--I of the first embodiment, and FIG. 3 is a front view of the first embodiment.

In the figure, 1 is the scroll casing, and the air inlet (
bell mouth) la is formed with an air outlet 1b on the side,
A centrifugal fan 2 rotated by a motor 8 is housed inside.

A narrow U-shaped gate 4 is provided on the upper surface of the scroll casing 1 so as to straddle the center of the air inlet 1a. This gate 4 is fixedly arranged on the upper surface of the casing 1 so as to stand upright in the vertical direction.

Reference numeral 5 denotes a hollow damper having a cylindrical shape with approximately 1/4 circumference, and this hollow damper 5 has a structure in which both side plates 5a are pivotally supported on both sides of the gate 4 and can rotate in a state such that it passes through the inside of the gate 4. It's Toshide. That is, there are holes 1 at the bottom of both sides of the gate 4.
2 (shown in FIG. 2) are arranged facing each other, the shaft pin 6 is inserted into the name tag 12, and one end of the shaft pin 6 is connected to each side plate 5a of the hollow door 5.
The other end is connected to the output part of the rotary actuator 7, and the hollow damper 5 is fixed by driving the rotary actuator 7.
rotates left and right so as to draw a semicircular rotation locus (here, the direction of left and right rotation is determined with respect to the drawing). The hollow damper 5 has openings A and B arranged at both ends in the rotation direction.

FIG. 4 is a sectional view showing the end structure of the hollow damper 5,
As shown in the figure, at both ends of the hollow damper 5 in the rotation direction,
An elastic body 10 (for example, injection molded rubber or molded urethane foam) having thin protrusions 9 on both sides is engaged with a convex portion 5b provided on the hollow damper 5. When the maximum left and right rotation position is reached, the thin protrusion 9 of one elastic body 10 touches the casing 1, as shown in FIG.
The thin protrusion 9 of the other elastic body 10 abuts on the upper surface and the gate 4, and the sealing performance of the abutment surface is ensured through this abutment of the elastic member. Furthermore, in this example,
Space that opens when hollow damper 5 is rotated to the left (space between scroll casing surface and damper opening B) S2
is the outside air intake side, and the space that opens when the hollow damper 5 is rotated to the right (scroll casing surface and damper opening A
The space between S) is the inside air intake side, and this space S1°S2 is partitioned off with a gate 4. And space S2 on the outside air intake side
is connected to an outside air introduction duct (not shown).

This duct connection is performed by fitting one end of the outside air introduction duct via a joint so as to wrap around the space SZ partitioned by the gate 4. On the other hand, space S on the inside air intake side
1 is set so that it can be exposed to an atmosphere of inside air and suck inside air from all directions.

Next, the operation of this embodiment will be explained.

Now, when the fan 2 is in the driving state and the hollow damper 5 is brought into the state shown in FIGS. 1 and 2, that is, at the right rotation limit position, the radial space S1 is fully opened and the inside air intake mode is entered. In this case, inside air from the vehicle compartment is drawn into the left radial space S1 from all directions, and as the fan 2 rotates, this inside air passes through the damper opening A and the inlet 1a of the casing 1 and enters the casing 1. It passes through the flow path B, exits from the outlet, and is introduced into an air conditioning unit (not shown). Next, when the hollow damper 5 is rotated from this position to the left rotation limit position by the actuator tough, the hollow damper 5 covers the left space S1 and the right space S2 is opened. In addition, in this state, the hollow damper 1
The elastic body 10 at the left end contacts the scroll casing surface, and the elastic member 10 at the right end contacts the gate 4. This brings the left radial space S1 into a sealed state. Therefore, in this case, the mode is set to outside air introduction mode, and outside air is taken in from the space S2 as the fan C 2 rotates.
It is introduced into the heating and cooling unit through the flow path in the casing 1 and the outlet 1b. In this way, in this embodiment, by rotating the hollow damper about the shaft 6, internal air and external air can be switched and selectively introduced. Furthermore, when the hollow damper 5 is stopped at a position halfway along the semicircular rotation locus by drive control of the actuator tough, the radial spaces Ss and S
2 are partially opened depending on the stop position of the hollow damper 5, and a mixture of inside and outside air is introduced.

According to this embodiment, various effects as described below can be achieved.

(1) In this embodiment, the conventional interior and exterior air switching box is abolished, and the interior and exterior air can be switched simply by rotating the hollow damper 5.

Since the air can be introduced, the ventilation resistance in the intake channel becomes zero regardless of the magnitude of the air volume.

In addition, the volume of the space at the intake of inside air and outside air is determined by Game 1-4.
It can be freely adjusted depending on the position of the air, and a large amount of air can be introduced efficiently. Therefore, even in a vehicle that requires a large air volume, such as a large passenger car, it is possible to realize an air conditioner with low noise, high static pressure, and a high air volume.

(2) Furthermore, since it does not have an inside/outside air switching box, it can be installed on any vehicle by simply connecting the outside air intake duct of the vehicle to the outside air side space C defined at the gate 4, making it highly versatile. Secured.

(3) Furthermore, when the hollow damper 5 is in a predetermined position in the inside air mode and the outside air mode, the elastic bodies 10 provided at both ends of the hollow damper 5 come into contact with the gate 4 and the upper surface of the scroll casing, ensuring reliable sealing. can be obtained.

(4) Furthermore, according to this embodiment, by installing the rotating shaft 6 for rotating the hollow damper 5 near the top surface of the scroll casing 1, the actuator 7 for rotating the hollow damper 6 can be scrolled. The actuator 7 can be installed directly on the top surface of the casing, and the actuator 7 can be directly connected to the rotating shaft of the hollow damper 6, which reduces the structural complexity of the conventional actuator and damper connection. It can be simplified to

(5) Since the actuator is installed above the space where the scroll casing is located, the pedestal is stable and has a fairly strong fixation against vibrations.

FIG. 5 shows a second embodiment of the present invention, in which the same reference numerals as in the first embodiment indicate the same or common elements. The difference between this embodiment and the first embodiment is that the hollow damper 5
It has a coupling structure of a shaft 6 for rotating the damper 5 and a drive mechanism for driving the damper 5. That is, in this embodiment, a link 13 is attached to the shaft 6, and the shaft 6 is connected via the link 13 to a wire of a manual rotation operation mechanism or various actuators such as a negative pressure type or an electric type. .

This embodiment can also produce the same effects as the first embodiment.

In addition, the above 1. In the second embodiment, a cylindrical body with a circumference of 174 is used as the hollow damper 5, but instead of this, a cylindrical body with a circumference of 1/4
A similar effect can be achieved by using a spherical damper.

〔Effect of the invention〕

As described above, according to the present invention, there is no need to install a conventional internal/external air switching box on the scroll casing, and as a result, ventilation resistance during internal/external air intake is significantly reduced and air intake efficiency is improved. As a result, high static pressure and high air volume of the automobile air conditioner can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line II in FIG. 1, and FIG. 3 is a front view of the first embodiment.
FIG. 4 is a partial sectional view of the first embodiment, and FIG. 5 is a perspective view of the second embodiment of the present invention. 1...Scroll casing, 1a...Air inlet,
1b... Air outlet, 2... Fan, 4... Gate, 5... Hollow damper, 6... Rotating shaft, 7... Drive mechanism, 10... Seal member, A, B...・Damper opening, S
l...Inside air intake space, S2...Outside air intake space.

Claims (3)

[Claims] 1. A scroll casing having an air inlet and an air outlet, a centrifugal fan rotating within the scroll casing, and a hollow damper having a cylindrical shape or an approximately 1/4 spherical shape with approximately 1/4 circumference, and a hollow damper on the air inlet side. The hollow damper is rotatably provided on the surface of the scroll casing via a drive mechanism so that its rotation locus forms a substantially semicircle above the air inlet, and Both ends are opened respectively, and the space between each of these openings and the scroll casing surface on the air inlet side is set to be alternately opened and closed by left and right rotation of the hollow damper,
Among the opening/closing spaces, a space that opens when the hollow damper is rotated in one direction is an inside air introduction section, and a space that is opened when the hollow damper is rotated in the other direction is an outside air introduction section. Air intake device inside and outside the device. 2. In the first aspect, a gate is provided on the side of the scroll casing where the air inlet is disposed so as to straddle the air inlet, and the hollow damper has a structure in which the hollow damper passes through the inside of the gate and rotates. The hollow damper is configured to have one end contacting the scroll casing surface and the other end contacting the gate via a sealing member when the hollow damper is rotated to the left and right limit positions. Air intake device. 3. 2. The internal and external air intake device for an automobile air conditioner according to claim 2, wherein the scroll casing is rotatably supported by the gate.