JPS6316563Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a vehicle air conditioner, and in particular, in a vehicle air conditioner that has a blower in the middle of the passage that introduces outside air into the vehicle interior, the amount of outside air introduced is increased by the vehicle speed and wind pressure when the blower is not operating. The present invention relates to a vehicle air conditioner.

In a vehicle air conditioner that includes a blower in the middle of a passage that introduces outside air into the vehicle interior, outside air is introduced by the vehicle speed and wind pressure generated when the vehicle is running even when the blower is not in operation. In order to improve the ventilation performance in the vehicle interior, it is preferable to increase the amount of outside air (dynamic pressure ventilation amount) introduced only by this vehicle speed and wind pressure even when the blower is not operating.

Conventionally, such devices have been designed to reduce the ventilation resistance of the passage by, for example, providing an air passage that bypasses the blower, and directing air that enters from the air intake port of the car body bypassing the blower and directly to the ventilation outlet in the passenger compartment. There is a method that increases dynamic pressure ventilation by reducing the amount of ventilation (Japanese Utility Model Publication No. 53-6200), but this requires extra space to provide a detour.

An object of the present invention is to provide a vehicle air conditioner that can increase the amount of dynamic pressure ventilation without requiring extra space.

In order to achieve this purpose, the vehicle air conditioner of the present invention has a part of the blower casing that separates the upstream side of the blower and the downstream side of the fan inside the blower, which opens when the fan stops, and opens between the upstream side and the blower. In addition to introducing outside air by short-circuiting the fan with the outlet side, a valve mechanism is provided that closes when the fan is operated.

The present invention will be described in more detail below with reference to embodiments shown in the drawings.

FIG. 1 is a perspective view of the main parts of a vehicle air conditioner according to an embodiment of the present invention, and FIG. Reference numeral 10 denotes a passage that communicates the outside of the vehicle with the interior of the vehicle, and a blower 20 that introduces outside air into the interior of the vehicle is provided along the passage. In the figure, the upper part of the passage 10 leads to the outside of the vehicle, and the right side of the passage 10 leads to the interior of the vehicle. The blower 20 includes a casing 22, a fan 24 disposed within the casing 22, and a motor 26 for rotating the fan 24. The casing 22 surrounds the circumference of the cylindrical fan 24 in a spiral shape with a gradually increasing radius, and a motor 26 that penetrates the bottom plate from below and drives the fan 24 is mounted on the bottom plate of the casing 22.
is attached, and the front surface of the casing 22 is covered with a bellmouth inlet plate 28 having a bellmouth-shaped opening 38 with the opening 38 positioned concentrically with the fan 24. Above the bell mouth suction plate 28 is a passage 10 having an outer diameter slightly smaller than the outer diameter of the casing.
This passage 10 on the upstream side communicates with the outside of the vehicle. Further, the opening corresponding to the outlet of the spiral casing is connected to the other opening 10 on the downstream side and communicates with the interior of the vehicle.

Therefore, the fan 2 in the casing 22 of the blower 20 on the upstream side of the blower 20 and inside the blower 20
An opening 30 is bored in the bell mouth suction plate 28, which separates the downstream side from the casing 22, and a valve body made of an elastic membrane that comes into contact with and leaves the casing 22 so as to cover the opening 30 from inside the casing 22. 32 is attached by screws 34. 3
6 is a mounting screw for fixing the fan bell mouth suction port plate 28 to the casing 22 body, and 38 is a suction port.

In the embodiment device configured in this manner, when the motor 26 is not operated, the vehicle speed wind pressure generated as the vehicle travels is applied to the valve body 32, and the valve body
2 leaves the opening 30. Therefore, the outside air is in the passage 1
It is introduced into the vehicle interior through the opening 30 from the upstream side of the vehicle. In this way, when the fan 24 is not operating, air flows around the fan 24, so the large ventilation resistance that occurs when passing through the fan 24 from the suction port 38 is eliminated, and the amount of dynamic pressure ventilation is increased. .

Further, when the motor 26 is operated to drive the fan 24, the pressure inside the casing 22 increases, and this pressure overcomes the vehicle speed wind pressure and presses the valve body 32. The valve body 32 is opened from the inside of the casing through the opening 32.
The opening 30 is closed. Therefore, the wind pressure generated by the fan 24 does not leak to the upstream side, and a predetermined amount of fan air is ensured.

In the above embodiment, an opening 30 is provided in the fan bell mouth suction port plate 28, and a valve body 32 that approaches and separates from this opening 30 is provided. It is also possible to adopt a valve mechanism other than the above-mentioned embodiment as long as it is a valve mechanism that short-circuits the fan and the blower outlet side and closes to prevent this short-circuit when the fan is in operation. As an example of such a device, at least a portion of the fan bell mouth suction port plate 28 is pivotally supported so as to be openable and closable, and the openable/closable portion of the plate 28 is linked with the rotation of the fan by a link mechanism. When the fan is stopped, the passage 10 may be opened to short-circuit it, and when the fan is rotated, it may be returned to the closed position.

As described above, according to the vehicle air conditioner of the present invention,
It is possible to significantly increase the amount of dynamic pressure ventilation, and the ventilation performance in the vehicle interior is significantly improved. Therefore, there is no need for extra space such as providing a separate detour, and there is no risk of limiting the degree of freedom in designing the vehicle body. Furthermore, since no fundamental changes are required to the existing structure of the passageway or the blower, it is easy to manufacture.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of an embodiment of the device of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1. 10... passage, 20... blower, 22... casing, 24... fan, 26... motor, 28
……Fan Bell Mouth Suction Plate, 30
...Opening, 32...Valve body, 34...Screw, 38...
...Suction port.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a vehicle air conditioner that has a blower in the middle of a passage that introduces outside air into the vehicle interior, the blower casing on the upstream side of the blower and the downstream side of the fan inside the blower. 1. A vehicle air conditioner comprising: a valve mechanism that opens when the fan is stopped to short-circuit the upstream side and the outlet side of the blower; and closes when the fan is in operation. (2) Utility model registration claim No. 1, characterized in that the valve mechanism is provided with an opening in the portion of the blower casing, and a valve body made of an elastic membrane that approaches and separates from the inside of the casing is attached to the opening. )
The vehicle air conditioner described in Section 1.