JP2003341351A - Vehicular air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular air conditioner capable of improving defroster performance without causing uncomfortable feelings due to an increase in temperature near the occupant head D. <P>SOLUTION: A ventilation duct 6 as a conditioned air passage for supplying conditioned air to the vehicular front glass 13 or side glasses 14 of a driver's room from an air-conditioning unit 1 is built-in a front pillar 12, or the hollow inner part of the front pillar 12 is used as a part of the conditioned air passage 6. Thereby, the defroster performance, particularly below the front glass 13, can be improved without causing the uncomfortable feelings due to an increase in temperature near the occupant head D. The use of the inner part of the vehicular front pillar 12 eliminates the need for a space in the driver's room 10 for the ventilation duct and can reduce duct assembling work on a vehicular assembling line. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning air blowing structure for a vehicle provided with an air conditioning unit on the ceiling of a driver's cab, and is particularly suitable for use in vehicles such as trucks, construction machinery and agricultural machinery. Is.

[0002]

2. Description of the Related Art Conventionally, a vehicle equipped with an air conditioning unit on the ceiling of a driver's cab usually employs a structure in which conditioned air is blown downward from the ceiling.

[0003]

However, in the above-mentioned conventional structure, in the defroster blowing mode for preventing the windshield of the vehicle from being fogged, warm air is blown downward from the ceiling portion. In order to obtain a sufficient anti-fog effect for the vehicle front glass, there is a problem in that the temperature near the head of the occupant in the driver's cab rises and the face feels uncomfortable due to burning or the like.

Further, when it is attempted to obtain a sufficient anti-fog effect on the windshield of a vehicle in winter, for example, water generated by melting at the upper portion of the windshield is re-frozen at the lower portion of the windshield,
There is a problem that the operation of the wiper is hindered. The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a vehicle air conditioner capable of improving defroster performance without causing discomfort due to a temperature rise near the occupant's head. To provide.

[0005]

In order to achieve the above object, the technical means described in claims 1 to 3 is adopted. That is, according to the first aspect of the invention, the air conditioning unit (1) is provided on the ceiling of the vehicle driver's cab (10), and a pair of hollow front pillars (12) are provided on the front left and right portions of the vehicle operator's cab (10). ) And a vehicle front glass (1
3) or an air-conditioning air passage (6) for supplying air-conditioning air to the driver's cab side glass (14) is built into the front pillar (12), or the hollow interior of the front pillar (12) is air-conditioned. It is characterized by being used as a part of the wind passage (6).

This is because the discomfort caused by the temperature rise near the occupant's head and the lack of defroster performance described in the problems are due to the structure in which warm air-conditioned air is blown down from the ceiling. The inside of the pillar (12) is used to guide the warm air downward from the ceiling.

As a result, it is possible to improve the defroster performance particularly under the front glass (13) without causing discomfort due to a temperature rise near the occupant's head. Also,
Since the inside of the vehicle front pillar (12) is used, the volume of the ventilation duct does not narrow the inside of the cab (10), and the duct assembly work in the vehicle assembly line can be reduced.

According to the second aspect of the invention, the conditioned air outlets (6a, 6b) for blowing out the conditioned air introduced into the conditioned air passage (6) toward the vehicle front glass (13) or the cab side glass (14). ) Is provided in the front pillar (12), and the conditioned air is blown out from the conditioned air outlets (6a, 6b) in a substantially horizontal direction.

As a result, warm air can be blown out evenly to the vehicle front glass (13) or the cab side glass (14) without causing discomfort due to a temperature rise near the occupant's head. The defroster performance can be improved. Further, the defroster performance of the driver's cab side glass (14), which has not been solved by the conventional structure for blowing down from the ceiling, can be improved.

According to a third aspect of the present invention, the vehicle is a truck, a construction machine, an agricultural machine, or the like, and the air conditioning unit (1) is a ceiling-mounted cabin air conditioner. As a result, in vehicles such as trucks, construction machinery, and agricultural machinery, the defroster performance of the ceiling-mounted cabin air conditioner can be improved without causing discomfort due to temperature rise near the occupant's head. By the way, the reference numerals in parentheses of the above-mentioned means are examples showing the correspondence with the concrete means described in the embodiments described later.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic vertical sectional view of a vehicle cab according to an embodiment of the present invention. Further, FIG. 2 is a diagram showing a blowout state from the front pillar in the vehicle cab in the embodiment of the present invention, and FIG. 3 is a sectional view of the front pillar in the embodiment of the present invention.

The vehicle of this embodiment is a vehicle such as a truck, a construction machine, or an agricultural machine, and 10 is a cab of the vehicle. A pair of hollow front pillars 12 are disposed on the front left and right portions of the vehicle cab 10. Front pillar 1
Reference numeral 2 is a portion that supports the ceiling portion of the vehicle body. An air conditioning unit 1 is installed on the ceiling as a cabin-mounted air conditioner for the ceiling. By the way, D is an occupant, and 11 is the cab 10 so that the occupant D can sit.
It is a driver's seat disposed in the rear of the inside of the vehicle.

The air-conditioning unit 1 is provided on the ceiling so that the overhead space of the occupant D is wide. In order to introduce indoor air (or outdoor air) from an indoor air intake port (or an outdoor air intake port that can be switched by an indoor air intake port and a switching damper) not shown in the rear of the air conditioning unit 1 and blow it into the operating room as conditioned air. The blower 2 is provided.

Further, an evaporator (cooling heat exchanger) 3 for cooling the air blown from the blower 2 and a heater core (heating heat exchanger) 4 for cooling the air blown from the blower 2 are provided in the middle part as a cooling and heating mechanism. And are provided. The evaporator 3 is provided in a refrigeration cycle having a compressor driven by a vehicle engine (not shown), and cools the blown air by latent heat of vaporization of the refrigerant. Further, the heater core 4 heats the blown air using the cooling water (warm water) of the vehicle engine as a heat source.

The conditioned air that has been cooled or overheated is switched by the mode switching door 5 to either the conditioned air passage 6 on the front side of the vehicle or the warm air passage 7 on the rear side of the vehicle depending on the blowing mode. The air conditioning air passage 6 on the front side of the vehicle has a ventilation duct 6 as a resin air conditioning air passage built in the front pillar 12 of the vehicle body (see FIG. 3).
Or the hollow interior of the front pillar 12 is used as a part of the conditioned air passage 6.

By the way, reference numeral 15 in FIG. 3 is a heat insulating material such as urethane for insulating the vehicle body 12 and the ventilation duct 6 from each other. For example, it is attached to the outer surface of the ventilation duct 6 and used in the vehicle assembly line. Can be assembled by inserting into the front pillar 12.

In the defroster mode for clearing the cloud of the vehicle window glass, the warm air heated by the heater core 4 is introduced into the air conditioning air passage 6 and the air outlet grill 6a provided in the front pillar 12 as an air conditioning air outlet. , 6b blows out in a substantially horizontal direction toward the vehicle front glass 13 or the cab side glass 14 (see FIG. 2).

In the cooling mode for cooling the inside of the operator's cab 10, the cool air cooled by the evaporator 3 is introduced into the air conditioning air passage 6, and the wind direction louvers provided in the blowout grills 6a and 6b are directed to the passenger D side. By directing, the cold air is blown toward the occupant D from the blowout grills 6a and 6b in a substantially horizontal direction.

In the heating mode for warming the inside of the driver's cab 10, the warm air heated by the heater core 4 is supplied to the driver's cab 10.
The warm air is blown toward the feet of the occupant D from the air outlet 7a through the hot air duct 7 as a hot air passage that extends to the feet of the occupant D from behind and under the driver's seat 11.

Next, the features of this embodiment will be described. An air conditioning unit 1 is installed on the ceiling of the vehicle cab 10 and a vehicle cab 1
In a vehicle air conditioner applied to a vehicle having a pair of hollow front pillars 12 on the front left and right sides of 0, air conditioning air is supplied from the air conditioning unit 1 to the vehicle front glass 13 or the cab side glass 14. The ventilation duct 6 as an air-conditioning air passage is provided in the front pillar 12 or the hollow interior of the front pillar 12 is used as a part of the air-conditioning air passage 6.

As a result, it is possible to improve the defroster performance particularly under the front glass 13 without causing discomfort due to a temperature rise near the head of the occupant D. Further, since the inside of the vehicle front pillar 12 is used, the volume of the ventilation duct does not narrow the inside of the cab 10, and the work of assembling the duct in the vehicle assembly line can be reduced.

Further, blowing grilles 6a and 6b for blowing the conditioned air introduced into the conditioned air passage 6 toward the vehicle front glass 13 or the driver's cab side glass 14 are provided in the front pillar 12, and the air conditioning is performed from the blowing grills 6a and 6b. The wind is blown out in a substantially horizontal direction.

As a result, warm air can be uniformly blown to the vehicle front glass 13 or the driver's cab side glass 14 without causing discomfort due to a temperature rise near the head of the occupant D, so that the defroster performance is improved. Can be improved. Further, it is possible to improve the defroster performance of the driver's cab side glass 14, which has not been solved by the conventional structure of blowing down from the ceiling.

The vehicle of this embodiment is a truck, a construction machine, an agricultural machine, or the like, and the air conditioning unit 1 is a ceiling-mounted air conditioner for a cabin. As a result, in vehicles such as trucks, construction machines, and agricultural machines, the defroster performance of the ceiling-mounted cabin air conditioner can be improved without causing discomfort due to temperature rise near the head of the occupant D.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a vehicle cab according to an embodiment of the present invention.

FIG. 2 is a diagram showing a blowout state from a front pillar in a vehicle cab according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a front pillar according to the embodiment of the present invention.

[Explanation of symbols] 1 Air conditioning unit 6 ventilation ducts (air-conditioning air passages) 6a, 6b Air outlet grill (air conditioning air outlet) 10 vehicle cab 12 front pillar 13 Vehicle front glass 14 Driver's side glass

Claims (3)

[Claims] 1. A vehicle driver's cab (10) is provided with an air conditioning unit (1) on the ceiling thereof, and a pair of hollow front pillars (12) on the front left and right sides of the vehicle driver's cab (10). In a vehicle air conditioner applied to a vehicle, an air conditioning air passage (6) for supplying air conditioning air from the air conditioning unit (1) to a vehicle front glass (13) or a cab side glass (14) is provided in the front. A vehicle air conditioner, characterized in that it is built in a pillar (12) or the hollow interior of the front pillar (12) is used as part of the air conditioning air passage (6). 2. An air conditioning air outlet (6a, 6a, which blows out the air conditioning air introduced into the air conditioning air passage (6) toward the vehicle front glass (13) or the cab side glass (14).
The vehicle air conditioner according to claim 1, wherein 6b) is provided in the front pillar (12), and the conditioned air is blown out substantially horizontally from the conditioned air outlet (6a, 6b). 3. The vehicle according to claim 1 or 2, wherein the vehicle is a truck, a construction machine, an agricultural machine, or the like, and the air conditioning unit (1) is a ceiling-mounted air conditioner for a cabin. Vehicle air conditioner.