JPH0593917U - Intake unit of automobile air conditioner - Google Patents

Abstract

(57) [Summary] [Purpose] The opening area of the inside air intake port can be made large, noise is low, and the space around the inside air intake port can be saved. It is an object of the present invention to provide an intake unit for an air conditioner for a vehicle, which can be retained in the vehicle. [Composition] An inside air inlet is formed on the floor side of the intake case, and the inside air inlet on the floor side is opened and closed by a shutter that moves orthogonal to the inside air inflow direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an intake unit for an air conditioner for a vehicle, in which an inside air intake port is separately provided on the floor side of a vehicle compartment, the opening area of the inside air intake port can be expanded, and the space around the inside air intake port can be saved.

[0002]

[Prior Art]

 BACKGROUND ART Generally, an air conditioner for a vehicle includes an intake unit that takes in air inside a vehicle compartment (hereinafter simply referred to as “inside air”) or outside air inside the vehicle compartment (hereinafter simply referred to as “outside air”) by rotating a fan with a motor, and this intake unit. The air discharged from the outlet of the cooler unit is connected so that the air is discharged and the air discharged from the outlet of this cooler unit is branched to the heater core side and the bypass side by the mix door. The heater unit is configured to mix cold air and warm air again in the mixing chamber to form air of a predetermined temperature and blow the air from various ducts toward a predetermined area in the vehicle compartment.

The intake unit has a structure having an inside air intake port and an outside air intake port, and an intake door that selectively opens and closes both intake ports. In this type of intake unit, we have proposed a structure that efficiently selects the inside and outside air (see Japanese Patent Publication No. 56-32125 and Japanese Patent Publication No. 62-29411), and has a large intake opening area to improve the intake resistance. Various proposals have been made such as a structure for reducing the noise during inhalation (see Japanese Patent Laid-Open No. 62-29411).

Further, from the viewpoint of opening the inside air intake opening in the vehicle in the direction with the least noise, for example, an intake unit as shown in FIG. 3 has also been proposed. In this intake unit, a fan 4 is built in a case 3 composed of an anti-floor side half body 1 and a floor side half body 2, and an outside air intake port provided in the anti-floor side half body 1. In addition to 5 and the inside air intake port 6, the inside air intake port 8 is provided in the floor side half body 2 for taking in the air inside the vehicle. In addition, the inside air and the outside air are selected by selectively opening and closing the outside air intake port 5 and the inside air intake port 6 by the intake door 9 attached to the floor-side half body 1. The interlocking second intake door 10 opens and closes the inside air intake port 8 on the floor side. Then, in the outside air mode, the outside air is introduced from the outside air intake port 5, while in the inside air mode, the inside air is introduced from both the inside air intake port 6 on the opposite floor side and the inside air intake port 8 on the floor side. Introduced in the unit. Therefore, the area where the inside air is taken in as a whole increases, and the suction resistance and the noise due to the suction resistance decrease. Also, since one of the noise sources, that is, the inside air intake port 8 on the floor side is opened toward the floor surface, the noise generated here is the structure around the undercover 31, such as the undercover 31. Will be blocked or reflected by and will be transmitted and reduced.

[0005]

[Problems to be solved by the device]

 However, in the intake unit described above, by opening the inside air intake port 8 on the floor side toward the floor surface, it is possible to surely reduce the noise during intake of the inside air of the intake unit. Since the second intake door 9 that opens and closes the inside air intake port 8 on the side is a cantilever door, a space s for opening and closing the door is required on the floor side of the intake unit. Depending on the size of this space s, the door s may be opened. If the opening angle of 9 is regulated and the door 9 is made small to allow a large opening angle, the suction port must also be made small and a sufficient opening area cannot be secured, and the space s must be increased. However, there is a problem in that the space around the legs in the passenger compartment becomes narrower when trying to secure the opening angle of the door 9. Further, in this conventional intake door 9, a rotational torque is generated in the closing direction due to the wind pressure of the inside air sucked from the inside air inlet, so that the door 9 is securely held at an arbitrary open position, for example, a half open position. There was also the problem that it was difficult.

The present invention has been made to solve the above-mentioned problems, and it is possible to increase the opening area of the inside air intake port, to reduce noise, and to save space around the inside air intake port. Another object of the present invention is to provide an intake unit of an air conditioner for a vehicle, which is capable of accurately maintaining the open position of the inside air intake port.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides an intake case with an inside air intake port for taking in vehicle interior air and an outside air intake port for taking in vehicle outside air. In an intake unit of an automobile air conditioner in which a fan for sucking air and blowing the air to a unit connected to the downstream side is provided in the intake case, an inside air intake port is formed on the floor side of the intake case. An intake unit for an air conditioner for a vehicle, characterized in that the inside air intake port is opened and closed by a shutter that moves in a plane orthogonal to the inflow direction of the vehicle interior air that flows in from the inside air intake port.

[0008]

[Action]

 By doing so, since the inside air intake port is provided on the floor side of the intake case, noise during intake of the inside air is reduced and the opening / closing of the inside air intake port on this floor side is orthogonal to the direction of the inside air inflow. Since this is done by a shutter that moves on the surface, a sufficient opening area can be secured without increasing the space between the intake unit and the floor for opening and closing the intake port, saving space around the internal air intake port. Is possible. Further, in such a shutter, the force exerted on the shutter by the wind pressure of the inside air sucked from the inside air intake port on the floor side is orthogonal to the moving direction of the shutter and does not affect the opening / closing movement of the shutter. The shutter can be reliably held at an arbitrary open position.

[0009]

【Example】

 An embodiment according to the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an intake unit of an automobile air conditioner according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing a main part of an inside air intake on the floor side. The same members as those shown in FIG. 3 are designated by the same reference numerals.

As shown in FIG. 1, the intake unit of the present embodiment has a fan 4 built in a case 3 composed of a half body 1 on the opposite floor side and a half body 2 on the floor side. The opposite floor half 1 has an outside air intake port 5 and a first inside air intake port 6 and a second inside air intake port 7 that are opened to take in the air inside the vehicle and face each other across the outside air intake port 5. ing.

A first intake door 11 and a second intake door 12 are rotatably provided at the outside air intake port 5, the first inside air intake port 6, and the second inside air intake port 7, respectively. The first intake door 11 opens and closes the first inside air intake port 6, while the second intake door 12 opens and closes the second inside air intake port 7, while the first intake door 11 and the second intake door 16 open the first inside air space. When the intake port 6 and the second inside air intake port 7 are fully closed at the same time, the outside air intake port 5 is fully opened (see FIG. 1). On the contrary, when the first intake door 11 fully opens the first inside air intake port 6 and the second intake door 12 fully opens the second inside air intake port 7, both the first and second intake doors 11 and 12 are opened. As a result, the outside air intake port 5 is fully closed (see the dashed line in Fig. 1). When the first intake door 11 half-opens the first inside air intake port 6 and the second intake door 12 half-opens the second inside air intake port 7, both of the first and second intake doors 11 and 12 are opened. The outside air intake port 5 is also opened halfway by the action. On the other hand, the fan 4 built in the intake case 3 is rotated by the electric motor 15 and has suction ports 15a and 15b on the floor surface side and the non-floor surface side, respectively.

The floor-side half 2 of the intake unit of this embodiment has two floor-side inside air intake ports 8a and 8b that are opened to take in the inside air. The inside air inlets 8a, 8b on the floor side are fan-shaped with respect to the boss 22 provided on the bottom portion 21 of the half body 2 on the floor side as shown in FIG. The ridge portions 8c and 8d are formed on the portion and one radial edge portion, respectively. Further, the inside air intake ports 8a and 8b on the floor side are opened and closed by a rotary shutter 25 that rotates around a rotary shaft 23 that is inserted into the boss 22. The rotary shaft 23 of the rotary shutter 25 has an operating lever 26 fixed to the tip portion penetrating the boss 22 by means of screws 27. The rotary shutter 25 is connected to the operating lever 26 by a cable or an actuator. It can be rotated to open and close the inside air intake ports 8a and 8b on the floor side.

That is, when the rotary shutter 25 is at the fully closed position of the inside air intake ports 8a and 8b on the floor surface side, the outer peripheral surface of the rotary shutter 25 and the ridges 8c of the outer peripheral edge portions of the intake ports 8a and 8b. And the one side surface of the shutter 25 and the ridge portions 8c at the radial edge portions of the suction ports 8a and 8b. At this time, a packing (not shown) may be provided on the abutting surface so that the abutting portions are completely in close contact with each other. When the rotary shutter 25 rotates in the opening direction (clockwise in FIG. 2), the inside air intake ports 8a and 8b on the floor surface gradually open, and the rotation angle is 45 degrees and the half-open state is 90 degrees. The fully open state.

Next, the operation will be described. The intake unit according to the present embodiment has an outside air introduction mode, an inside / outside air introduction mode (outside air: inside air = 8: 2), an inside / outside air introduction mode (outside air: inside air = 2: 8), and an inside air introduction, as described below. One of the modes is selected.

Outside air introduction mode When only outside air is blown to the cooler unit and the heater unit side, the first inside air intake port 6, the second inside air intake port 6 are provided by the first intake door 11, the second intake door 12 and the rotary shutter 25. 7. The inside air intake ports 8a and 8b on the floor side are closed. When the blower is operated in this state, the outside air is introduced into the case 3 from the outside air intake port 5, this air passes through the fan scroll portion from the intake port 15a on the side opposite to the floor of the fan 4, and a cooler unit or the like (not shown). Be blown to.

Inside air introduction mode When only the inside air is blown to the cooler unit and the heater unit side, the first inside air intake port 6, the second inside air intake port 6 are provided by the first intake door 11, the second intake door 12 and the rotary shutter 25. 7. Fully open the inside air inlets 8a and 8b on the floor side. At this time, the outside air suction port 4 is closed by the cooperation of the first intake door 11 and the second intake door 12. When the blower is operated in this state, the inside air is guided from the first inside air intake port 6 and the second inside air intake port 7 to the half 1 on the anti-floor surface side, and this air is introduced to the air intake port 15a on the anti-floor surface side of the fan 4. While being sucked, the cabin air introduced from the inside air intake ports 8a and 8b on the floor side is guided to the intake port 15b on the floor side of the fan 4, and is blown to the cooler unit or the like together with the inside air. .. At this time, in the intake unit according to the present embodiment, since the intake case 3 is provided with the floor-side inside air intake ports 8a and 8b, noise is reduced during intake of the inside air, and the inside air intake port 8a on the floor side is also reduced. , 8b are opened and closed by a rotary shutter 25 that rotates and moves at right angles to the inside air inflow direction, so that the space s between the intake unit and the floor surface can be sufficiently sucked without increasing the space for opening and closing the suction port. The openings 8a and 8b can be fully opened, and therefore, the space around the inside air intake openings 8a and 8b can be saved.

Inside / outside air introduction mode When the mixed air of the outside air and the inside air is blown to the cooler unit and the heater unit side at a desired intake air volume ratio, the two air intakes of the first intake door 11 and the second intake door 12 are used. The intake door partially opens or closes the first indoor air intake port 2 and the second indoor air intake port 3, and the rotary shutter 25 fully opens or partially opens the indoor air intake ports 8a and 8b on the floor side. When the blower is operated in this state, the outside air is guided from the outside air intake port 5 into the half-body 1 on the side opposite to the floor surface, and this air is sucked into the suction port 15a on the side opposite the floor surface of the fan 4, resulting in a half-open state. Air inside the vehicle is introduced from the first inside air intake port 11 and the second inside air intake port 12 and guided to the intake port 15a on the side opposite to the floor of the fan 4. On the other hand, the inside air is introduced from the inside air intake ports 8a and 8b on the floor side and guided to the intake port 15b on the floor side of the fan 4, where it is blown to a cooler unit or the like while being mixed with the outside air. At this time, in the intake unit according to the present embodiment, the force applied to the rotary shutter 25 in the half-open state by the wind pressure of the inside air sucked from the inside air intake ports 8a, 8b on the floor side is the rotational opening / closing of the shutter 25. Since it is orthogonal to the moving direction, it is possible to reliably hold the door 13 in the half-open position without opening and closing the rotary shutter 25.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified within the scope of the utility model registration claim. For example, the above-described embodiment is a shutter having a shape in which two fan shapes are combined, but the shutter is not limited to this shape and can be variously changed.

[0019]

[Effect of the device]

 As described above, according to the present invention, since the inside air intake port is provided on the floor side of the intake case, noise is reduced when the inside air is sucked, and the inside air intake port on the floor side is opened and closed in the inside air inflow direction. Since the shutter is moved at a right angle to the intake unit, a sufficient opening area can be secured without increasing the space between the intake unit and the floor to open and close the intake port. It is possible to save space. In addition, the force applied to the shutter by the wind pressure of the inside air sucked from the inside air intake port is orthogonal to the movement direction of the shutter and does not affect the opening / closing movement of the shutter.Therefore, hold the shutter securely at any open position. You can

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention,

FIG. 2 is an exploded perspective view of an essential part showing an inside air intake port portion on a floor side,

FIG. 3 is a cross-sectional view showing an intake unit of a conventional automobile air conditioner.

[Explanation of symbols]

3 ... intake case, 4 ... fan, 5 ... outside air inlet,
6 ... 1st inside air inlet, 7 ... 2nd inside air inlet, 8a, 8b
… Inside air intake on the floor side, 25… rotary shutter.

Claims (1)

[Scope of utility model registration request] 1. The intake case (3) is provided with an inside air intake port (6, 7) for taking in vehicle interior air and an outside air intake port (5) for taking in vehicle exterior air. In an intake unit of an air conditioner for an automobile, a fan (4) for sucking air from an intake port (5, 6, 7) and blowing the air to a unit connected to a downstream side is provided in the intake case (3), Inside air inlets (8a, 8b) are formed on the floor side of the intake case (3), and the inside air inlets (8a, 8b)
An intake unit for an air conditioner for a vehicle, characterized in that a shutter (25) that moves in a plane orthogonal to the inflow direction of the vehicle interior air that flows in from opens and closes the inside air intake ports (8a, 8b).