JP2533192Y2 - Duct structure of air conditioner for construction vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct structure of an air conditioner for a construction vehicle in which a cooling air outlet and a warm air outlet are arranged at optimal positions for cooling and heating in a cab.

[0002]

2. Description of the Related Art In recent years, an air conditioner (hereinafter simply referred to as an air conditioner) is installed in a cab of a construction vehicle in order to improve the working environment of an operator. In the case of excavators, installing an air conditioner that requires space for the operator to operate the work lever from the front window while looking at the work situation from the front window interferes with visibility and installation and operation of operating equipment. As shown in FIG. 6, the air conditioner b in the driver's cab a
Is usually installed at the rear, and the cool air outlet d is based on the principle of natural convection that cool air falls and warm air rises.
Is provided on the upper surface of the case e, and the cool air rises behind the driver's seat c as shown by the white arrow in the figure, then circulates in the room while descending in front of the driver's seat c, and the hot air outlet f is The warm air is provided at the lower part of the front of e and circulates forward from the side of the driver's seat c as shown by the black arrow in the figure, and circulates indoors while heating the upper body from the feet of the operator g.

[0003]

However, in the conventional air conditioner b, the outlet f of the warm air is provided behind the driver's seat c, so that the warm air always heats the feet as expected. And circulates upward from the outlet f, and the defroster effect, that is, the front window h
However, there is a problem that the effect of removing the fogging of the glass cannot be obtained.

Further, since the cool air outlet 4 is located at the rear upper portion of the driver's seat 3, it just circulates upwards over the shoulder of the operator, so that the shoulder becomes too cold and causes physiological disorders such as neuralgia, There was a problem that the cooling air circulating upward descended along the window, cooling the feet, but insufficient cooling of the front of the upper body.

SUMMARY OF THE INVENTION The present invention has been made for the purpose of improving the above-mentioned conventional problems, and an air conditioner for a construction vehicle in which the above-mentioned problems have been solved by disposing air outlets at locations most suitable for cooling and heating respectively. The purpose of the present invention is to provide a duct structure.

[0006]

According to the present invention, in order to achieve the above object, a main duct from an air conditioner installed at a rear portion of a driver's seat is branched through a first chamber in the air conditioner case. One of the branch ducts is provided as a cool air duct at a cool air outlet provided on the upper surface of the case, and the other is used as a common air duct for cold air and hot air. After arranging it to a close view,
The front end of the common duct is connected to a second chamber provided with a hot air outlet at the front and a cold air branch duct provided at an upper part up to a cool air outlet provided on the upper surface of the electrical equipment panel.
And a damper mechanism for switching between cold air and hot air is provided in each of the second chamber and the second chamber.

[0007]

Therefore, the damper mechanism of the first and second chambers is switched in accordance with the cooling and heating to supply the cool air and the warm air from the air conditioner to the respective outlets through the main duct and the branch duct. Cool air is blown out from the upper surface and the upper surface of the electric panel on the side of the driver's seat to circulate in the room, and in particular to cool the front of the upper body of the operator. In addition, during heating, warm air is blown from the front inner side surface of the electrical panel on the side of the driver's seat to heat the feet of the operator.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. In FIG. 1, reference numeral 1 denotes an operator's cab mounted on the upper surface of a vehicle body frame 2. A front window 1a is mounted on a front surface of the operator's cab 1, and a driver's seat 3, an operation lever 4, and a driver An electrical panel 5 such as an instrument or a monitor is attached. An air conditioner 6 is installed at the rear of the driver's seat 3, and an air conditioning unit 8 housed in the air conditioning case 7 is provided with an air inlet (not shown), a cooler core, a heater core, an electric motor, and the like. The cool air and the warm air from the air conditioning unit 8 driven by the above are discharged to the main duct 9 protruding from the case 7. A first chamber 10 is attached to the main duct 9.
The main duct 9 is branched via the chamber 10, and one of the branch ducts is a cold air duct 11 which is
The air outlets 12a and 11b are further branched into two, and the cold air outlets 12 provided on the left and right sides of the upper surface of the air conditioning case 7 are provided.
a, 12b. The other branch duct is a shared duct 13 for cold air and hot air, and is disposed near the front end inside the lower edge of the electrical equipment panel 5 installed on the side of the driver's seat 3 and has a second chamber 14 at the front end. Is being worn.

A warm air outlet 15 is provided at a front portion of the second chamber 14 and opens to a front 15a and a side 15b toward the driver's seat 3. In addition, a cool air branch duct 16 is vertically disposed above the upper part, and is connected to a cool air outlet 17 provided on the upper surface of the electrical equipment panel 5.

The first and second chambers 10 and 14 of the air conditioner duct structure are provided with first and second damper mechanisms 18 and 19, respectively.
In the first chamber 10, the opening / closing plate 20 is rotated around the shaft pin 22 by the swing of the lever 21 and the branch duct 1
The entrances 23 and 24 of the first and the first 13 are closed and opened. Similarly, the second damper mechanism 19 has the opening / closing plate 25 in the second chamber 14 when the lever 26 swings.
Rotating around the fulcrum 7, the inlet 28 of the warm air outlet 15 and the inlet 29 of the cool air duct 16 are closed and opened. The levers 21 and 26 of the first and second damper mechanisms 18 and 19 are connected by an interlocking wire 30. When the first damper lever 21 is swung by an operating device (not shown), the opening / closing plate 20 is turned. The opening / closing plate 25 of the second damper mechanism 19 is rotated in conjunction with the movement.

Next, the first and second damper mechanisms 18 and 19 will be described.
5A to 5C will be described with reference to FIG.
Indicates the supply of cold air during cooling, and the first damper mechanism 1
By operating the lever 21 of FIG. 8 rightward in the figure, the opening / closing plate 20 is rotated clockwise to an intermediate position where the entrance 31 of the first chamber 10 of the main duct 9 is bisected, and the interlocking wire 30 is used. The lever 26 of the damper mechanism 19 of the second chamber 14 is pulled rightward, and the opening / closing plate 25 rotates clockwise so that the inlet 28 of the hot air outlet 15 is opened.
Is closed, and conversely, the inlet 29 of the cool air duct 16 is opened. Thereby, the cool air is divided into two by the first chamber 10, and one of them is sent to the cool air outlets 12a and 12b provided on the upper surface of the air conditioning case 7 through the cool air duct 11,
The other enters the second chamber 14 through the common air / hot air duct 13, and is sent from the chamber 14 to the cold air duct 16 to the cold air outlet 17 provided on the upper surface of the electrical panel 5.

FIG. 5B shows the supply of warm air during heating. When the lever 21 of the first damper mechanism 18 is operated to the left in the figure, the opening / closing plate 20 is rotated counterclockwise. The cold air duct 11 of the first chamber 10 is closed, and the inlet 24 of the cold air / hot air shared duct 13 is opened.
Opening / closing plate 25 of second damper mechanism 19 by interlocking wire 30
To close the inlet 29 of the cool air duct 16 on the upper surface side of the cool air outlet 17 of the electrical component panel 5 and open the inlet 28 of the hot air outlet 15 on the contrary. As a result, the warm air enters the second chamber 14 from the first chamber 10 through the common cold / hot air duct 13, and is sent to the warm air outlet 15 therefrom.

[0013]

[Effects of the Invention] The present invention is constructed as described above.
Air conditioning ducts are provided so that cold air or warm air is blown out to the front and upper body of the operator, which is the most effective place in accordance with heating, so that cool air and hot air can be sensed at an early stage.
The efficiency of heating is increased and the economic effect of air conditioning is improved, and at the same time, the work environment of the operator is improved and the work efficiency is improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of air conditioning in a construction vehicle air conditioner according to the present invention.

FIG. 2 is a perspective view showing the arrangement of the air conditioning duct according to the present invention.

Figure 3 is an enlarged sectional view of the first Chiyanba in P ₁ part of FIG.

Figure 4 is an enlarged cross-sectional view of a second Chiyanba in P ₂ parts of FIG.

FIG. 5A is an explanatory diagram showing a cool air supply path during cooling.
(B) is an explanatory view showing a hot air supply path during heating.

FIG. 6 is an illustration of air conditioning in a conventional construction vehicle air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Operator's cab 2 Driver's seat 5 Electrical panel 6 Air conditioner 7 Air conditioning case 8 Air conditioning unit 9 Main duct 10 First chamber 11 Cold air duct 12a, b Cold air outlet 13 Duct for common use of cold air and hot air 14 Second chamber 15 Hot air outflow Mouth 16 Cold air duct 17 Cold air outlet 18 First damper mechanism 19 Second damper mechanism 20 Opening / closing plate 21 Lever 25 Opening / closing plate 26 Lever 30 Interlocking lever

Claims (2)

(57) [Scope of request for utility model registration] 1. A main duct from an air conditioner installed in a rear part of a driver's seat is branched via a first chamber in the air conditioner case, and one of the branch ducts is provided as a cool air duct on an upper surface of the case. In addition, the inside of the electrical panel installed on the side of the driver's seat is arranged to the vicinity of the lower part of the front end as a common duct for cold air and hot air, and the other is provided at the front end of the common duct. A second chamber provided with a hot air outlet and a cold air branch duct provided at an upper portion to a cold air outlet provided on the upper surface of the electrical panel is connected to the first and second chambers. A duct structure for an air conditioner for a construction vehicle, comprising a switching damper mechanism. 2. The duct structure for an air conditioner for a construction vehicle according to claim 1, wherein the opening and closing operations of the damper mechanisms of the first and second chambers are interlocked.