JPS5930732Y2 - Vehicle with air conditioner - Google Patents

Description

[Detailed description of the invention] The present invention relates to a vehicle air conditioner suitable for use in construction and industrial vehicles such as bulldozers and forklifts.
In particular, it relates to the structure of the outlet section.

In recent years, there has been a trend toward installing enclosed cabs in construction and industrial vehicles in order to improve the working environment for passengers, and with this trend, there has been a demand for the installation of air conditioners.

Generally speaking, construction and industrial vehicles have small passenger compartments and lack space to install an air conditioning system. Therefore, the air conditioning unit of the air conditioning system is installed outside the passenger compartment (for example, on the roof), and the air outlet is installed inside the passenger compartment. It may be installed on the ceiling.

By the way, if the air conditioner is an all-season type that has both cooler and heater functions, and the air outlet is attached to the ceiling as described above, both cold air and warm air will be blown downward from the ceiling. Therefore, the blown air is always blown from the occupant's upper body, including the face, toward the lower body.

For this reason, in the conventional device, the temperature distribution is higher in the upper part of the passenger compartment and lower in the lower part, contrary to the temperature distribution of cold head and feet required for heating, and it is not possible to enjoy a comfortable feeling of heating.

In addition, the temperature of the blown warm air drops before it reaches the occupant's lower body, so the occupant may feel the blown air as a draft at his feet, making him feel slightly cold.

Furthermore, there are other drawbacks, such as the occupant's throat becoming dry due to the high temperature of the face.

Therefore, in view of the above-mentioned drawbacks, this invention provides a heater/cooler outlet constant switching mechanism in the outlet switching case installed on the ceiling of the passenger compartment, blows cold air from above during cooling, and forms the framework of the passenger compartment during heating. Among the columnar members adjacent to the passenger compartment window glass, the columnar member adjacent to the passenger compartment window glass is used as a ventilation duct, and hot air is blown from the middle part of the duct toward the window glass and from the lower end of the duct toward the feet. The purpose of the present invention is to provide an air conditioning system for a vehicle that can provide comfortable air conditioning without impairing the air quality, has low manufacturing costs, and does not impair the comfort of the passenger compartment.

The present invention will be described below with reference to an embodiment shown in the drawings.

1 to 4, reference numeral 1 denotes an air conditioning unit of an air conditioner, which is installed outside a passenger compartment 2 of a construction or industrial vehicle, for example, on the roof 2a of the passenger compartment.

This air conditioning unit 1 includes an air inlet (not shown), a cooler core (refrigerant evaporator) 3, a heater core 4, an electric blower 5,
It is composed of an air discharge port 6 and the like.

7 is an air outlet switching case attached to the ceiling inside the passenger compartment 2.

The skeleton of the passenger compartment 2 is formed by combining hollow columnar members.

The passenger compartment 2 is composed of each columnar member, an outer panel 2e surrounding the passenger compartment 2, and a window glass 15.

Among the columnar members, the columnar member 2b adjacent to the window glass 15
extends in the left-right direction on the ceiling of the passenger compartment 2, and the columnar members 2c and 2d communicate with the columnar member 2b at their upper portions and hang down from the ceiling of the passenger compartment 2 to the floor.

The central portion 2b' of the columnar member 2b communicates with the inside of the air outlet switching case 7 via a laterally elongated open lower portion provided on the side wall 7' of the case 7.

The interior of the air outlet switching case 7 is divided into two chambers 9 by a partition wall 8.
It is divided into 10 sections.

These compartments communicate with each other through a horizontally elongated opening 8' provided in the partition wall 8.

The rear wall forming the chamber 10 on the opposite side to the front wall 7' of the air outlet switching case 7 is provided with an upper air outlet 11 that discharges air toward the upper body of the occupant A. It is preferable to attach to the outlet 11 a lattice grille 11' that can be rotated vertically and horizontally for the purpose of adjusting the design and wind direction.

The chamber 9 communicates with the air outlet 6 of the air conditioning unit 1,
Damper 12 for switching the outlet of the sent air
is provided in this room.

A shaft 13 is attached to the damper 12 so as to pass through the case 7. A lever 14 is attached to one end of the shaft 13, and this lever 14 protrudes from the outside of the case 7. It can be operated from outside.

As mentioned above, in the portions of the columnar members 2c and 2d whose upper ends are in communication with the columnar member 2b and which are parallel to the window glass 15,
A defroster outlet 16 is provided, and a lower outlet 1 near the floor of the passenger compartment blows air toward the feet of the occupants.
7 is a provision.

The opening area of the defroster outlet 16 is set to be smaller than the opening area of the lower outlet to the extent that most of the air volume is obtained through the lower air outlet 17, but an air volume sufficient to obtain the defroster effect is obtained.

Although each of the columnar members 2b, 2c, and 2d in this embodiment has a rectangular cross-sectional shape, the cross-sectional shape of these columnar members is not limited to the rectangular shape, and the columnar members may be hollow and the hollow portion may be used as an air passage. If possible, any cross-sectional shape can be adopted.

Although there are some columnar members extending in the longitudinal direction of the passenger compartment 2, illustration thereof is omitted for clarity of the drawing.

Although not shown, a condensing unit including a condenser and a cooling blower is installed in parallel with the air conditioning unit 1 at the upper part of the roof 2a.

Here, the condensing unit may be attached to the front of the radiator of the vehicle engine (not shown).

Further, the compressor of the refrigeration cycle is driven by the vehicle engine.

Furthermore, the heater core 4 utilizes vehicle engine cooling water as hot water.

Next, the operation of the above configuration will be explained.

Air inside the passenger compartment or air outside the passenger compartment is introduced into the air conditioning unit 1 by the blower 5 in the air conditioning unit 1 through an air inlet (not shown), air-conditioned by the cooler core 3 or the heater core 4, and then passed through the air outlet. 6 into the chamber 9 of the outlet switching case 7.

During heating when the damper 12 is at the solid line position in FIG. 3, the opening 8' of the partition wall 8 is closed by the damper 12, so that
The chamber 10 and the upper outlet 11 are blocked from hot air, and the warm air is sent from the chamber 9 through the open lower part of the front wall 7' of the outlet switching case 7 to the columnar members 2b, 2c, 2d-\ and blows the defroster. The air is blown out from the outlet 16 onto the window glass 15 and from the lower air outlet 17 toward the feet of the occupant A.

During cooling when the damper 12 is at the dotted line position in FIG. 3, the damper 12 closes the opening lower part of the front wall of the outlet switching case 7, so the columnar member 2b is cut off from the chamber 9.
The cold air in the room 9 enters the room 10 through the opening 8' in the wall partition 8, and is blown out toward the upper body of the occupant A through the upper air outlet 11.

Therefore, in both heating and cooling, it is possible to provide the occupant A with a comfortable air-conditioned feeling with a cold head and warm feet, and it is also possible to prevent the window glass 15 from fogging up.

The air outlet can be easily switched by the occupant A by operating the lever 14.

In the above-described embodiment, an all-season type air conditioner that includes a built-in cooler core 3 and a heater core 4 has been described, but the present invention can also be applied to a heating device that includes only a built-in heater core 4.

In that case, the upper air outlet 11 is used as the blower 5 when heating is not used.
It can be used as a ventilator outlet by operating only the ventilator.

In addition, in the above embodiment, the air conditioning unit 1 is installed on the roof, but if the air outlet switching case 7 is installed on the ceiling of the passenger compartment, the installation position of the air conditioning unit 1 can be either inside or outside the passenger compartment. Any position is fine.

Further, defroster outlets 16 provided on the columnar members 2c and 2d
The position and number of the lower air outlet 17 are not limited to the arrangement shown in the illustrated example, and any position and number may be used as long as it is within the range of the columnar member that communicates with the air outlet switching case 7.

Furthermore, the defroster outlet 16 and the lower outlet 17 may be provided with an opening/closing damper mechanism, if necessary.

As described above, according to the present invention, even if the air outlet switching case 7 is attached to the ceiling of the passenger compartment, cold air is blown toward the upper body of the occupant during cooling, and warm air is blown toward the occupant's feet during heating. It is possible to obtain the temperature distribution of the blown air most suitable for air conditioning in the passenger compartment.

Furthermore, fogging of the window glass can be prevented by blowing warm air directly onto the window glass from a defroster outlet provided in a columnar member adjacent to the window glass.

In particular, during heating, the temperature in the upper part of the passenger compartment does not rise, which was a drawback with conventional methods, so the heating can be performed comfortably without the occupants complaining of discomfort such as a slight chill or dry throat. It's a dog.

Also, among the hollow columnar members forming the skeleton of the passenger compartment, the columnar members 2b, 2c, and 2d adjacent to the passenger compartment window glass 15 are
Since it is used as a ventilation duct and the air is blown out from the air outlet provided in these columnar members, there is no need to provide a ventilation duct as a separate part, reducing manufacturing costs.
Space in the passenger compartment is secured and the comfort of the passenger compartment is not compromised.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view showing an embodiment of the present invention mounted on a vehicle body, Fig. 2 is a side sectional view of Fig. 1, Fig. 3 is an enlarged sectional view of main parts of Fig. 1, and Fig. 4. is a sectional view taken along IV-IV in FIG. 2; 1...Air conditioning unit, 2...Crew room,
2b. 2c, 2d... Column member, 3... Cooler core, 4... Heater core, 5... Electric blower, 7... Outlet switching Case 11...
...Top air outlet, 12...Damper, 15.
...Window glass, 16...Defroster outlet, 17...Lower outlet.

Claims (1)

[Scope of claim for utility model registration] In a vehicle in which the framework of the passenger compartment is formed by combining columnar members with hollow interiors, a cooler core, a heater core,
It has an air conditioning unit with a built-in blower, etc., and an outlet switching case into which cold air and hot air are sent from the air conditioning unit, and this outlet switching case is attached to the ceiling of the passenger compartment.
The air outlet switching case is provided with an upper air outlet facing the upper body of the passenger, and the air outlet switching case includes a columnar member 2b adjacent to the window glass 15 of the passenger compartment among the columnar members. 2c and 2d are connected to each other, the hollow part of the columnar member adjacent to the windowpane is used as a ventilation duct, and the lower end of the columnar member adjacent to the windowpane has a lower air outlet facing the passenger's feet, and the middle part thereof has a lower air outlet. A defroster outlet facing the window glass is provided, and the upper outlet is further provided inside the outlet switching case;
A vehicle equipped with an air conditioner, comprising a damper that switches air flow between the lower air outlet and the defroster air outlet.