JPH07186692A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To provide an air conditioner for vehicle which can reduce the space in the lengthwise direction of an air conditioner duct which is required for the installation of a branched duit, in comparison with the conventional. CONSTITUTION:As for an air conditioner for vehicle which leads a portion of the air which passes through a filter 11 in an air conditioner duct 1 into a branched duct 3, a cavity part 13 which is opened in a flow passage on the downstream side from the filter 11 of the air conditioner duct 1 and is cut off from a flow passage on the upstream side from the filter 11 is formed between the outer periphery of the filter 11 and the inner periphery of the air conditioner duct 1, and the air taking port 3a of the branched duct 3 is installed at the cavity part 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner provided with a branch duct for taking out a part of air passing through a filter for cooling a blower motor, for example.

[0002]

2. Description of the Related Art As a vehicle air conditioner, for example, as shown in FIG. 3, an air intake port 3a of a blower motor cooling duct 3 is provided downstream of a filter 2 of an air conditioning duct 1 (on the right side of the figure).
Is opened, and a part of the clean air that has passed through the filter 2 is guided to the outer periphery of the blower motor 4 as shown by an arrow C in the figure to cool it (for example, Japanese Patent Laid-Open No. 62-13).
7222). In the figure, 1a is an air intake port of the air conditioning duct 1, 5 is a blower fan which is rotationally driven by a blower motor 4, and 6 is an evaporator. Although not shown on the downstream side of the evaporator 6, as is well known, an air mix door and a heater core for adjusting the temperature of the air and a distributor for distributing the temperature-controlled air to the air outlets of various parts of the vehicle compartment are provided. To be

[0003]

In the air conditioner shown in FIG. 3 described above, when the diffusion portion 1b (see FIG. 4) of the air blown from the blower fan 5 is short, the flow rate distribution of the air guided to the evaporator 6 is reduced. Air conditioning performance deteriorates due to variations. Therefore, it is desirable to install the filter 2 and the evaporator 6 as far away from the blower fan 5 as possible. However, in the above-described device, since the air blowing direction from the blower fan 5 to the filter 2 side matches the vehicle width direction, the length of the diffusion portion 1b and the distance from the blower fan 5 to the evaporator 6 are limited by the vehicle width. In order to branch the blower motor cooling duct 3 from between the filter 2 and the evaporator 6 under such a limitation, there is no choice but to separate the filter 2 from the evaporator 6 and approach the blower fan 5 side.
This shortens the diffusion portion 1b.

An object of the present invention is to provide a vehicle air conditioner capable of reducing the space in the lengthwise direction of the air conditioning duct required to install the branch duct, as compared with the conventional air conditioner.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1 showing an embodiment, the present invention is directed to a vehicle air conditioner for guiding a part of air passing through a filter 11 in an air conditioning duct 1 to a branch duct 3. Applies to equipment. A space between the outer circumference of the filter 11 and the inner circumference of the air conditioning duct 1 is opened in a flow path on the downstream side of the filter 11 of the air conditioning duct 1 and is blocked from a flow path on the upstream side of the filter 11. 13 is formed, and the air intake 3a of the branch duct 3 is provided in the space 13 to achieve the above-mentioned object. The void 13 is, for example, a recess 11 a provided on the outer periphery of the filter 11, and the shielding member 1 provided so as to cover the recess 11 a from the upstream side of the air conditioning duct 1.
It can be formed by

[0006]

The flow of air from the upstream side of the filter 11 into the space 13 is blocked by the shielding member 12, while the filter 11
Part of the air that has passed through flows into the space 13 from the downstream side of the filter 11 and is taken into the branch duct 3 from the air intake port 3a. Since the void portion 13 is provided between the outer circumference of the filter 11 and the inner circumference of the air conditioning duct 1, the air conditioning duct 1 necessary for providing the air intake port 3a of the branch duct 3 is provided.
The space in the length direction (air flow direction) of the filter 1
Shared with 1 mounting space.

Incidentally, in the section of means and action for solving the above problems for explaining the constitution of the present invention, the drawings of the embodiments are used for making the present invention easy to understand. It is not limited to.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. The same parts as those in FIGS. 3 and 4 described above are designated by the same reference numerals and the description thereof will be omitted. FIG. 1 shows a schematic configuration from the air intake 1a of the air conditioning duct 1 to the evaporator 6 of this embodiment. As is clear from the figure, in this embodiment, the concave portion 1 is formed on the outer periphery of the filter 11.
1a is provided, and a shield plate 12 that covers the recess 11a from the upstream side of the air conditioning duct 1 is attached to the air conditioning duct 1. The concave portion 11 a and the shielding plate 12 open the flow path on the downstream side of the filter 11 to open the filter 11
A space 13 is formed between the outer periphery of the filter 11 and the inner periphery of the air conditioning duct 1 so as to be blocked from the upstream flow path. The air intake port 3a of the blower motor cooling duct 3 is provided in the space 13.

The filter 11 can be inserted into and removed from the air conditioning duct 1 through a filter attachment / detachment port (not shown) provided in the air conditioning duct 1. As shown in FIG. 2, the recess 11a of the filter 11 is formed at a corner opposite to the attachment / detachment direction of the filter 11 (direction of arrow O in the figure). As a result, the air intake 3a of the blower motor cooling duct 3 protruding into the air conditioning duct 1 does not interfere with the insertion and removal of the filter 11. In the illustrated example, the recess 11a is formed in a square shape, but may be modified in various shapes such as a triangular shape and a quarter-arc shape.

According to the above construction, the shielding plate 12 blocks the inflow of air from the upstream side of the filter 11 into the space 13, while a part of the air passing through the filter 11 is indicated by an arrow C in FIG. As shown, the air intake port 3 flows into the space 13
It is taken into the blower motor cooling duct 3 from a. Therefore, clean air can be introduced to the outer periphery of the blower motor 4 to cool it as in the conventional case. Air conditioning duct 1
Since the installation space of the air intake port 3a of the blower motor cooling duct 3 and the installation space of the filter 11 are shared in the length direction (the direction of air flow) of the blower motor, compared to the conventional example shown in FIG. There is a margin in the lengthwise dimension of the duct 1. Therefore, it is possible to improve the air conditioning performance by bringing the filter 11 closer to the evaporator 6 side than the conventional filter 2 shown in FIG. 3 to lengthen the diffusion portion 1b, suppressing variations in the flow rate distribution of the air guided to the evaporator 6.
If it is not necessary to lengthen the diffusion part 1b, the filter 11
Can be installed at the same position as the filter 2 in FIG. 3 and the evaporator 6 can be brought closer to the blower fan 5 side to shorten the total length of the air conditioning duct 1. Alternatively, the space on the downstream side of the evaporator 6 can be expanded while maintaining the entire length of the air conditioning duct 1.

In the above embodiment, the blower motor cooling duct 3 constitutes a branch duct, and the shielding plate 12 constitutes a shielding member. The shield plate 12 may be attached to the filter 11. The air taken into the branch duct is not limited to cooling the blower motor 4 and may be used for other purposes. The mounting position of the filter 11 is not limited to the position immediately before the evaporator 6, and may be another position.

[0012]

As described above, according to the present invention,
Since the space in the lengthwise direction of the air conditioning duct required to provide the air intake of the branch duct can be shared with the space for installing the filter, the space in the lengthwise direction of the air conditioning duct required when installing the branch duct can be made smaller than before. Can also be reduced. For this reason, the limited length of the air conditioning duct can be used more efficiently than before, such as by making the diffusion part of the air blown from the blower fan longer than before, or the length of each part of the previous air conditioning duct. The overall length of the air conditioning duct can be shortened while maintaining the distribution, and the air conditioner can be downsized.

[Brief description of drawings]

FIG. 1 is a sectional view of an inside of an air conditioning duct of an apparatus according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a cross-sectional view of the inside of an air conditioning duct of a conventional air conditioner.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

[Explanation of symbols]

 1 Air-conditioning duct 3 Blower motor cooling duct 3a Blower motor cooling duct air intake 6 Evaporator 11 Filter 12 Shielding plate 13 Void

Claims (2)

[Claims] 1. A vehicle air conditioner for guiding a part of air that has passed through a filter in an air conditioning duct to a branch duct, wherein between an outer periphery of the filter and an inner periphery of the air conditioning duct,
An air intake opening of the branch duct is provided in the air-conditioning duct by forming a void portion that opens in a flow passage downstream of the filter and is blocked from a flow passage upstream of the filter. A vehicle air conditioner characterized by the above. 2. The void portion is formed by a concave portion provided on the outer periphery of the filter and a shielding member provided so as to cover the concave portion from the upstream side of the air conditioning duct. Air conditioning system for vehicles.