JPS60261719A - Blower device for car air conditioner - Google Patents

Abstract

PURPOSE:To check water spread along a wall surface as well as to make rainwater preventable from penetrating into a driving motor, by installing an air intake for cooling a motor in a heat exchanger case, being joined with a slip stream of a blower case or a duct. CONSTITUTION:A cooling water intake 60 of a cooling unit cast 50 is installed at the more downstream side of a wind than a blower case discharge surface 2. Therefore, an amount of rainwater penetrated inside a blower case 1 is spread wide at the cooling unit side, so that a possibility of the rainwater being entered inside a motor from the air intake installed in the blower side is brought to nothing at all. In addition, it is effective that a waterdrop flowing along a blower case wall surface is absorbed, owing to a groove 41 formable in a joining part between the cooling unit case and the blower case discharge surface or wind-leak preventing packing 40.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an air conditioner for an automobile, and particularly to a motor cooling structure for a blower device.

[Background of the invention]

Generally, a blower device for an automobile air conditioner consists of a blower motor and a case that houses the blower, and air is taken in from the blower case to cool the blower motor. The cooling air intake is made by Utsukai 57-280.
As shown in Figure 10, the pipe inlet that serves as the air passage is raised above the inner wall of the case to prevent water that has entered through the outside air intake from entering the air passage. If an opening is formed in the bottom wall, it is not possible to completely prevent rainwater, dirt, etc. from entering.

To prevent this, as in Utility Model No. 11id 56-23126 or Utility Model No. 56-40179, by opening the air intake into the blower case from the side wall of the blower case or the ceiling wall of the blower case, rainwater and snow accumulated at the bottom of the case can be removed. It is also known to prevent entry into the motor interior. However, water that flows along the wall of the case due to surface tension cannot be removed, even if it is on the ceiling wall or side wall, and there is a risk that the water may enter through the cooling air intake and enter the motor housing. was there.

[Purpose of the invention]

An object of the present invention is to provide a vehicle air conditioner configured to prevent rainwater, snow, etc. that have entered the blower case from entering the drive motor together with cooling air.

[Summary of the invention]

The present invention has the following features: 1. By providing the motor cooling air intake in the heat exchanger case or duct that is connected to the downstream side of the blower case, the water that has passed along the wall is transferred between the discharge surface of the blower case and the heat exchanger case or duct. The grooves naturally formed at the joints are also designed to prevent air leakage at the joints with gaskets or the like to prevent rainwater from entering the drive motor.

[Embodiments of the invention]

Examples of the present invention will be described below.

FIG. 3 is a schematic cross-sectional view of one embodiment of the present invention.

4 is a view of FIG. 3 seen from above, and FIG. 5 is a perspective view of this embodiment.

In the figure, a spiral blower case 1 housing a blower 10 and an inside/outside switching box 20 are provided on the top of the blower case. The inside/outside switching box 20 has an outside air intake port 22 and an inside air intake port 23, and an outside air switching door 21 for selectively switching between the outside air intake port 22 and the inside air intake port 23 is opened. Prowa case 1
The air discharge surface of the cooling unit case 50 communicates with the cooling unit case 50, and the joint surface thereof is provided with a gasket 40 to prevent air leakage.

The cooling unit case 50 includes:
A cooling intake port 60 is provided, and the motor is cooled by joining the motor cooling vibe 11 to the intake port.

According to this embodiment, since the cooling intake port 60 is provided on the downstream side of the blower case discharge surface 2, the amount of mountain water that has entered into the blower case 1 is diffused on the cooling unit side. The closed air intake reduces the risk of rainwater getting inside the motor. In addition, the groove 41 formed at the joint between the cooling unit case and the discharge surface of the blower case or the gasket 40 for preventing wind leakage has the effect of absorbing water droplets that are transmitted to the wall surface of the blower case.

FIG. 6 shows another embodiment of the present invention, and shows a seventh embodiment of the present invention.
The figure is a sectional view of the air intake port of FIG. 6. In this embodiment, on the side wall surface 50a of the cooling unit case,
An air intake port 60 is provided and has the same effect as the previous embodiment.

In the above two embodiments, the cooling air intake is provided in the cooling unit case, but if there is no cooling unit case, that is, if the tact is directly connected, or if the heating unit case is connected. However, if the cooling air intake is located on the downstream side of the wind from the joint surface of the blower case and these, the same effect will occur.

〔Effect of the invention〕

According to the present invention, the cooling air intake for cooling the blower motor is provided further downstream of the air flow than the joint surface with the heat exchanger case and the duct, which is connected to the air outlet of the blower case, so that it is connected to the blower case. Grooves or gaskets formed in the joints of the heat exchanger unit case and the heat exchanger cover have the effect of removing water, snow, etc. that travels along the wall surface.

[Brief explanation of the drawing]

1 and 2 are sectional views of a conventional blower device, FIG. 3 is a sectional view of an embodiment of the present invention, and FIG. 4 is a top view of the same.
FIG. 5 is a perspective view thereof, FIG. 6 is a drawing showing another embodiment of the present invention, and FIG. 7 is a detailed view of the air intake port of FIG. 6. DESCRIPTION OF SYMBOLS 1... Prower case, 2... Wind discharge surface, 3... Air passage, lO... Motor, 11... Cooling pipe, 2
0...Inside and outside air switching box, 21...Inside and outside air switching door, 2
2...Outside air inlet, 23...Inside air intake, 30...
・Bellmouth, 40...Baratin, 41...jl,
50... Cooling unit figure, 5 figure, 6 day body 0) U

Claims (1)

[Claims] 1. In a motor that rotates the blower and is equipped with an air passage for feeding cooling air into the housing of the motor, the intake of the air passage is connected to the blower case and its downstream side through a duct.