JPH07325Y2 - Car air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an air conditioner for an automobile.

[Prior art]

Generally, an air conditioner for an automobile has a blower unit, a cooling unit and a heater unit connected by a duct or a casing, and is provided with an outside air / inside air intake port and a plurality of outlets (vent outlet, foot outlet, defroster outlet). By switching a plurality of doors (inside / outside air switching doors, air mix doors, vent doors, etc.) incorporated inside, air conditioning in a desired mode is performed.

For example, Japanese Utility Model Laid-Open No. 62-26208 describes the structure of a general air conditioner installed in an automobile, and the air conditioner of a conventional automobile is generally the front of the front seat in the passenger compartment behind the dash panel. Was installed in.

[Problems to be solved by the invention]

When the air conditioner is installed in the vehicle compartment as in the above-mentioned conventional technology, the foot space of the front seat (especially the passenger seat) of the vehicle is narrowed, and the vibration and noise generated from the blower unit are directly propagated into the vehicle compartment. There are problems such as high noise level in the room.

[Means for solving problems]

An automobile air conditioner according to the present invention has a heater unit having a heater core built-in in a passenger compartment, a blower unit under the passenger compartment floor, and the blower unit and the heater unit are connected by a duct. A heater pipe that connects the heater core and the engine is provided inside.

[Action]

In the vehicle air conditioner according to the present invention, since the blower unit of the air conditioner is arranged under the floor of the vehicle compartment, the foot space of the front diameter is expanded by the space of the blower unit.
Further, vibration and noise from the blower unit are blocked by the floor of the vehicle compartment, and the noise level in the vehicle compartment is improved. Since the heater pipe is arranged in the duct that connects the blower unit and the heater unit, the heat in the heater pipe preheats the air in the duct to improve the heating performance.

[Effect of device]

According to the vehicle air conditioner of the present invention, as described above, the blower unit is arranged under the floor of the passenger compartment, and the heater pipe is arranged in the duct, so that the front foot space can be expanded. The effect of improving sound insulation against vibration and noise from the unit and improving heating performance can be obtained.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show an outline of an air conditioner for a gab-over wagon vehicle, in which a portion of the floor panel 2 of the passenger compartment 1 between the driver's seat and the passenger's seat is greatly expanded toward the passenger compartment 1 side. The engine 3 is formed below the bulging portion 2A.

A dash panel 4 rises from the front end of the floor panel 2, and a cowl box 5 is provided in the vehicle width direction on the front side of the upper end of the dash panel 4.
Consists of an inclined dash lower panel in the lower half and an upper dash upper panel in the upper half.

The air conditioner includes a blower unit 6, a cooling unit 7, a heater unit 8, a first duct for introducing air into the blower unit 6, a second duct 10 extending from the cooling unit 7 to the heater unit 8, and an engine 3 Heater pipe 11 for circulating hot cooling water to the heater unit 8
And so on.

The blower unit 6 is disposed directly below the floor panel 2 on the front side of the bulging portion 2A, a cooling unit 7 is disposed in the vicinity of the left side thereof, and the first duct 9 is the suction portion of the blower unit 6. It extends further forward, rises upward along the dash panel, and its upper end penetrates the bottom wall of the cowl box 5 and opens into the cowl box 5 as an outside air intake port 20.

The outlet 6a of the blower unit 6 is connected to the inlet of the cooling unit 7 by the case 7a of the cooling unit 7, and the outlet 7b of the cooling unit 7 is the second duct.
It is connected to the inlet of the heater unit 8 via 10. The heater unit 8 is disposed in the vehicle compartment 1 near the rear side of the dash panel upper and in front of the passenger seat, and the second duct 10 is disposed substantially parallel to the left side of the first duct 9. ing.

The heater unit 8 is provided with a heater core 12, an air mix door 13, a vent door 14, a wind guide door 15, a defroster door 16, a vent outlet 17, an outlet 18 to the defroster, a foot outlet 19, and the like. Further, an inside / outside air switching door (not shown) having a general structure for opening / closing the outside air inlet 20 and the inside air inlet (not shown) is provided near the upper end of the first duct 9. The heater unit 8, its peripheral structure, the door opening / closing mechanism, and the like are the same as those known in the art, and a detailed description thereof will be omitted.

The heater pipe 11 is an introduction pipe 11a for introducing hot water for cooling the engine 3 into the heater core 12 of the heater unit 8.
And a return pipe 11b for returning to the engine 3 the cooling hot water radiated by the heater core 12, and the heater pipe 11
A part of the second duct 10 extending from the upstream part to the heater core 12 is arranged in the second duct 10, and the heater pipe 11 is made of a metal tube such as copper or brass having high thermal conductivity. The portion of the heater pipe 11 outside the second duct 10 is composed of a hose or a metal tube.
A mechanical or electromagnetic on-off valve that closes the passage in the heater pipe 11 when the cooling unit 7 is cooling is provided in the middle of 11.

Explaining the operation of the air conditioner, the outside air intake 20
Alternatively, the air introduced from the inside air intake to the first duct 9 flows to the blower unit 6 through the first duct 9, is pressurized by the blower unit 6 and flows to the cooling unit 7, and the cooling unit 7 to the second duct 10 is supplied. After being introduced into the heater unit 8, it is supplied from the heater unit 8 to the air outlets 17, 18, and 19 corresponding to the air conditioning mode (vent, heat, differential / heat, defroster, etc.). The air-conditioning mode and the opening / closing of the doors related to the air-conditioning mode are the same as those of the conventional device, and thus the description thereof is omitted.

In the above air conditioner, the blower unit 6 and the cooling unit 7 are arranged below the floor panel 2, so that the space in the passenger compartment 1 (particularly the space under the front seat) is expanded by the space required for them. As a result, comfortability and riding comfort are improved, and the degree of freedom in arranging devices around the instrument panel is increased.

Most of the vibrations and noise from the blower unit 6 are blocked by the floor panel 2, so that the noise level in the vehicle interior 1 is improved.

Moreover, since a part of the heater pipe 11 is disposed inside the second duct 10, the heat of the heater pipe 11 causes the second duct to be heated.
The air inside 10 is warmed and the heating performance during heating is improved.

Next, a modified example in which a part of the air conditioner is modified will be described with reference to FIGS. 3 and 4. The same members as those in the above embodiment are designated by the same reference numerals and the description thereof will be omitted. .

Instead of the first duct 9, an intake duct 9A having an L shape in a side view and extending slightly rearward from the blower unit 6 is provided, and the outside air intake 20A and the floor panel 2 are bulged at the upper end of the intake duct 9A. Inside air intake opened in the slanted wall 2a of part 2A
21 is provided, and an inside / outside air intake door 22 for opening / closing the outside air intake 20A and the inside air intake 21 is provided, and the position can be switched steplessly by a general door opening / closing mechanism.

In the air conditioner, since the outside air intake port 20A is arranged below the bulging portion 2A of the floor panel 2, the problem of rain and snow entering through the outside air intake port 20A peculiar to the cab-over type vehicle can be solved. Further, since the inside air intake port 21 is arranged on the rear side of the feet, the air flow in the vehicle interior 1 becomes a flow from the front to the rear, so that the temperature distribution inside the vehicle interior becomes uniform and the feeling is improved. Further, since the intake duct 9A is short, it is advantageous in terms of manufacturing cost and space. However, other actions and effects are similar to those of the above-described embodiment.

It goes without saying that the automobile air conditioner of the present application can be applied to automobiles other than the cab-over type automobile.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a vertical sectional side view of an air conditioner installed in a cab-over wagon vehicle, Fig. 2 is a partial cross-sectional view of the same, and Figs. FIG. 3 is a view corresponding to FIGS. 1 and 2 according to an example. 1 ... vehicle compartment, 2 ... floor panel, 3 ... engine, 6
…… Blower unit, 8 …… Heater unit, 11 …… Heater pipe, 12 …… Heater core.

Claims (1)

[Scope of utility model registration request] 1. A heater unit having a built-in heater core is provided in a vehicle compartment, a blower unit is provided under the floor of the vehicle compartment, the blower unit and the heater unit are connected by a duct, and the heater core and the engine are provided in the duct. An air conditioner for an automobile, characterized in that a heater pipe for connecting to and is provided.