JP4130185B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to a vehicle air conditioner capable of blowing conditioned air into a vehicle compartment from a vent outlet or a defroster outlet, and more particularly to a defroster blower capable of improving defrosting and anti-fogging performance of a vehicle window glass. It relates to improvement of the structure of the outlet.

  Conventionally, an air conditioning unit and a vehicle-side defroster duct of a vehicle air conditioner are subject to shape restrictions in order to fit in a certain space due to restrictions such as interference with peripheral parts. The blown air flow rate is determined, and the defrosting and anti-fogging performance of the window glass are also affected. That is, as shown in FIG. 3, the air blown from the defroster outlet 1 is directed only to the front of the vehicle, and it has been difficult to effectively defrost and defog the side of the windshield and the front side glass. As a method of correcting this performance, a certain outlet of the vehicle-side defroster duct is throttled, and the air volume of the outlet is reduced to increase the outlet ratio of other outlets, or the air conditioning is adjusted with other vehicle parts. Only the method of changing the unit or duct layout could be taken.

  On the other hand, in recent years, with the aim of securing a large vehicle compartment, space-saving, low noise, and high air volume are required for air conditioning units and other vehicle parts. Therefore, there is a problem that the above-described method using a decrease in air volume leads to an increase in noise and is difficult to employ. In addition, there is a problem that performance correction by changing the layout leads to an overall design change and is not easy.

  In addition, as a conventional technology, in order to prevent the generation of blowing sound when the mode door is set to a very small opening to adjust the air flow from the outlet, the air volume is not increased by a guide attached to the door. It is known from US Pat.

Japanese Patent Laid-Open No. 5-213048

  However, according to this Patent Document 1, the air volume ratio in each blowing mode is adjusted by reducing the air volume to an air volume corresponding to a minute opening by using a guide provided on the door as a resistance. Therefore, there is a problem that the air volume is reduced.

  The present invention has been made in view of the above problems, and its object is to maintain the vehicle-side duct layout and the air-conditioning unit layout as they are and to suppress the reduction in air volume (noise increase) as much as possible. It is an object of the present invention to provide a vehicle air conditioner having a structure of a defroster outlet that can increase the ratio of air conditioned air blown toward the front side glass as a direction.

The present invention provides a vehicle air conditioner according to each of the claims as means for solving the problems.
The air conditioner for a vehicle according to claim 1 is formed in a flat plate shape extending in the vertical direction in a defroster outlet that blows out the conditioned air from the air conditioning unit , which extends in the vertical direction and opens upward. And a guide that disperses the blowing wind in the vehicle width direction is disposed, and the guide is substantially V-shaped when viewed from the blowing direction, and the top of the V-shape is on the vehicle rear side. The open side of the V-shape is located on the front side of the vehicle, and the defroster outlet is divided into three spaces when viewed from the outlet direction , whereby the air volume of the outlet air from the defroster outlet The wind direction can be dispersed without deteriorating, and defrosting and anti-fogging performance can be exhibited over the entire surface of the windshield and the front side glass. In addition, it is possible to disperse the wind direction of the blowing air with a very simple guide. Furthermore, it can be divided and flowed in three directions inside and outside the V-shaped guide.

The vehicle air conditioner according to claim 2 is configured such that the defroster outlet is opened and closed by a plate door disposed below the guide and having a rotating shaft, and when the defroster mode is not selected. The amount of air blown from the defroster outlet can be assigned to the other outlet.

According to a third aspect of the present invention, the rotating shaft of the plate door is provided on the V-shaped opening side of the substantially V-shaped guide. It is possible to flow along the plate portion from the top of the V-shaped guide toward the opening side, and the direction of the blowing air can be changed without resistance.

  Hereinafter, a vehicle air conditioner according to an embodiment of the present invention will be described with reference to the drawings. In general, an air conditioning unit including a blower fan, an evaporator, and a heater core is disposed in an air conditioning case of a vehicle air conditioner. An air inlet is provided at one end of the air conditioning case, and air conditioning is performed at the other end. Various air outlets (air conditioned air) are provided. An inside / outside air switching door is provided on the suction side of the blower fan. When the blower fan is driven, inside air or outside air is introduced into the air conditioning case from the air introduction port, and is cooled by the evaporator. Note that a refrigerant that circulates in a refrigeration cycle including a compressor, a condenser, an expansion valve, and the like is introduced into the evaporator and used as an air cooling means.

  A heater core as air heating means is disposed on the downstream side of the evaporator. In addition, the cooling water of an engine is introduce | transduced into a heater core, and the air which passes by the heat | fever is heated. An air mix door is provided on the upstream side of the heater core. Depending on the opening of the door, a part of the air cooled by the evaporator is heated by passing through the heater core, and the remaining air bypasses the heater core. Flowing. After that, the branched air is recombined to become conditioned air, which is blown out from various air outlets such as a defroster air outlet and a vent air outlet provided at the other end of the air conditioning case. Yes.

  Next, the structure of the defroster outlet which is a feature of the present invention will be described. FIG. 1 is a perspective view of a defroster outlet, and FIG. 2 is a plan view and a cross-sectional view of the defroster outlet of FIG. The defroster outlet 1 is provided on the other end side of the air conditioning case 4 of the vehicle air conditioner and opens upward so as to blow the conditioned air toward the windshield. The defroster outlet 1 is provided with a guide 2 for diffusing the conditioned air blown from here, particularly in the vehicle width direction. The shape of the guide 2 is substantially V-shaped when the defroster outlet 1 is viewed from the outlet direction in FIG. 1, but other shapes are adopted if the conditioned air can be diffused in the vehicle width direction. May be. The defroster outlet 1 and the guide 2 have a structure that is molded as an integral part with an air conditioning case 4 that is divided into left and right (vehicle width direction) halves.

  A plate door 3 as a defroster door is provided below the guide 2 so as to open and close the defroster outlet 1. The rotary shaft 3a of the plate door 3 is provided on the V-shaped open side (opposite to the top portion 2a) of the substantially V-shaped guide 2, and the plate door 3 rotates with the rotary shaft 3a as a fulcrum. ing. Thus, by providing the rotary shaft 3a on the V-shaped opening side of the guide 2, when the plate door 3 is opened, the blowing air is blown from the top portion 2a of the V-shaped guide 2 along the plate portion 3b of the plate door 3. It is possible to flow toward the opening side, and the direction of the blowing air can be changed without difficulty, and at the same time, it can be dispersed.

  In the embodiment described above, the guide 2 is provided at the defroster outlet 1 in order to change the wind direction of the blowout air, but the guide may be provided on the plate door 3 side which is a defroster door.

  In the structure of the defroster outlet of the air conditioner for a vehicle according to the present invention having the above-described configuration, the direction of the blown air (see FIG. 3) that has been conventionally directed only to the front of the vehicle is V-shaped as shown in FIGS. The inside and outside of the shape guide. It can be divided into three directions of the vehicle front and the left-right direction (vehicle width direction), and defrosting and anti-fogging of the front side glass as well as the front glass can be performed.

It is a perspective view which shows the structure of the defroster blower outlet in the vehicle air conditioner of embodiment of this invention. It is the top view and sectional drawing of the structure of the defroster blower outlet of FIG. It is the top view and sectional drawing of the structure of the conventional defroster blower outlet.

Explanation of symbols

1 Defroster outlet 2 Guide 2a Top 3 Plate door (defroster door)
3a Rotating shaft 3b Plate part 4 Air conditioning case

Claims (3)

In a vehicle air conditioner equipped with air outlets such as a defroster air outlet and a vent air outlet that blows conditioned air from the air conditioning unit into the vehicle interior.
In the defroster outlet that extends in the vertical direction and opens upward, a guide plate that is also formed in a flat plate shape that extends in the vertical direction and disperses the blowing air in the vehicle width direction is disposed.
The guide is substantially V-shaped when viewed from the blowing direction, the top of the V-shape is located on the rear side of the vehicle, and the open side of the V-shape is located on the front side of the vehicle. A vehicle air conditioner that is partitioned into three spaces when viewed from the direction . 2. The vehicle air conditioner according to claim 1 , wherein the defroster air outlet is opened and closed by a plate door having a rotating shaft disposed below the guide. The vehicle air conditioner according to claim 2 , wherein a rotation axis of the plate door is provided on a V-shaped opening side of the substantially V-shaped guide.

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