JPH10100657A - Air conditioner in construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate installing work of an air conditioner by arranging a main body unit under a control seat, on one hand, arranging a duct unit being a flowing passage of air exhausted from the main body unit in the rear of the control seat, and arranging a blowout part unit above this duct unit. SOLUTION: An air conditioner 12 arranged in a cab of a hydraulic shovel is composed of a heater device 13 and a cooler device 14, and the cooler device 14 is composed of a main body unit 16, a duct unit 18 and a blowout part unit 20. In this case, a bracket 22 is fastened by a bolt to an upper side half part of an inside space of a seat frame 21. The duct unit 18 is composed of brackets 30 and 31 or the like, and in a duct 17, its inflow port is connected to a discharge port of an evaporator 15, and left and right outflow ports are extended to a rear intermediate part of a seat back part 6b of a control seat 6. The blowout part unit 20 is composed of a pair of left and right blowout parts 33L, and upper parts of the respective blowout parts 33L are projected outward to the left and right of the seat back rest part 6b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of construction machinery used for various types of construction work and civil engineering work.

[0002]

2. Description of the Related Art In general, in the case of this type of construction machine, for example, when this is a hydraulic excavator, a driver's cockpit is covered with a cab. In such a case, an air conditioner such as an air conditioner or a cooler is provided. Work environment may be improved. In this case, in addition to a main unit (indoor unit) that air-conditions and discharges the sucked air, a blowout portion of the air discharged from the main body unit, a duct from the main unit to the blowout portion, and the like are provided. When such an air conditioner is installed in a cab, it is difficult to secure a space for installing the air conditioner as the body becomes smaller, and it is also difficult to secure a work space for assembling the air conditioner. Problem.

[0003]

In order to solve the above-mentioned problem, Japanese Patent Laid-Open No. 6-106963 proposed that a main body unit having a blow-out portion be externally mounted on the rear upper portion of the cab. However, this system does not allow a stay for supporting the main unit as a separate part, so the distance to the outdoor unit becomes longer, a corresponding long pipe is required, and the air conditioning efficiency also decreases. There is a problem to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been made to solve these problems. A main unit that is arranged below the cockpit and air-conditions and discharges the sucked air; a duct unit that is arranged behind the cockpit and serves as a flow passage for the air discharged from the main unit; It is arranged above the duct unit and configured in combination with a blowing unit that blows out air from the duct unit. By doing so, when assembling the air conditioner to the construction machine, it is only necessary to assemble the units assembled in advance, and the assembling work is facilitated. Moreover, since this air conditioner is provided by effectively utilizing the space below and behind the cockpit, the air conditioner does not squeeze the operator's living space, and is further provided externally on the upper rear surface of the cab. In this way, it is possible to prevent the stay from being required as a separate part and to increase the distance to the outdoor unit. In this case, the duct unit is formed in a shape substantially along the rear side surface of the backrest portion of the cockpit, whereby a compact receiving state can be achieved.
Furthermore, the partition wall that separates the cockpit and the rear of the fuselage has a substantially concave groove shape in plan view with the rear part of the cockpit recessed and the left and right parts protruding forward, and a duct between the groove bottom and the cockpit. By arranging the units, even if the duct unit is arranged behind the cockpit, the sliding movement behind the cockpit is not restricted by the duct unit, and the space behind the fuselage is also reduced. Can be widely secured.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a hydraulic excavator. The hydraulic excavator 1 includes a lower traveling body 2 of a crawler type, an upper revolving body 3 rotatably supported above the lower traveling body 2, and an upper revolving body 3. The upper revolving unit 3 includes a cockpit 6, a cab 7 that covers the cockpit 6, an engine, and a hydraulic pump. The basic configuration, such as the provision of an engine room 9 or the like for accommodating a power mechanism (neither is shown) or the like, is the same as the conventional one.

In the cab 7, in addition to the cockpit 6, various control devices such as a left and right console box 10 and a traveling lever 11 are provided. Further, an indoor portion of an air conditioner 12 is provided. I have. In the present embodiment, the air conditioner 12 includes a heater device 13 and a cooler device 14, and the cooler device 14 implements the present invention.

In other words, the cooler device 14 includes a main unit 16 in which an evaporator 15 for cooling, dehumidifying and discharging the sucked air is incorporated, and a duct 17 in which a duct 17 serving as a flow passage of the air exhausted from the evaporator 15 is installed. The unit 18 is configured by combining three units of a blowing unit 20 provided with a blowing port 19 for blowing air from the duct 17 into the cab 7,
The main body unit 16 is formed by incorporating the evaporator 15 into an evaporator bracket 22 which is mounted inside a seat frame 21 described later.

The seat frame 21 is provided on the cab floor 8 to support the cockpit 6 and the console box 10.
Left and right leg portions 21a
And an upper surface portion 21 connecting these left and right leg portions 21a to each other.
b form a substantially zigzag shape in a front view.
A console bracket 23 to which the left and right console boxes 10 are attached on both left and right sides is provided on the upper side of the upper surface portion 21b so as to be slidable back and forth through a slide rail 24. 23, a seat 6 of the cockpit 6
The seat plate 25 to which a is attached is supported.

On the other hand, the inner space of the seat frame 21, that is, the upper half of the space formed by the upper surface 21b, the cab floor 8, and the left and right leg portions 21a,
The evaporator bracket 22 in which the evaporator 15 is incorporated is bolted.
Is provided such that the air suction port 15a is located on the front side, and the discharge port 15b for cooling, dehumidifying and discharging the sucked air is located on the rear side. The evaporator unit 16 in which the evaporator 15 is incorporated can be easily assembled by attaching the seat frame 21 to the seat frame 21 before setting the seat frame 21 on the cab floor 8. In the figure, 26 is the evaporator 15
A reference numeral 27 denotes a front cover that covers the front side of the evaporator 15, and 28 denotes a front cover that covers the front side of the seat frame 21. Further, the heater device 13 is provided in a lower half of the inner space of the seat frame 21.

The duct unit 18 includes a duct 17 and a cover support 29 which will be described later.
First and second duct brackets 3 for attachment to
The duct 17 has a shape substantially along the rear surface side of the backrest portion 6b of the cockpit 6;
An inlet 17a provided at the lower end thereof is connected to an outlet 15b of the evaporator 15, and left and right outlets 17b provided at the upper end are provided so as to reach a rear intermediate portion of the backrest portion 6b of the cockpit 6. ing. In the figure, reference numeral 32 denotes a cushion seal attached to the connection between the evaporator outlet 15b and the duct inlet 17a.

On the other hand, the cover support 29 is for separating the cockpit 6 and the engine room 9. The rear portion of the cockpit 6 is recessed, and both left and right portions project forward. The groove bottom surface 29b of the groove portion 29a is formed to be inclined so as to conform to the shape of the rear surface of the duct 17, and the groove bottom surface 29b and the cockpit are formed. 6, a duct unit 18 is provided. As described above, the cockpit 6 is provided so as to be slidable back and forth. However, even when the cockpit 6 is located at the rearmost end side, the cockpit 6 and the duct unit 18 do not interfere with each other. It has become. Further, the left and right width of the duct unit 18 is set so as to fit between the left and right console boxes 10 in a front view, so that the duct unit 18 does not interfere with the console box 10 located at the most rear end side. Has become. The duct unit 18 can be easily assembled to the cover support 29 by bolting the first duct bracket 30 temporarily fixed to the duct 17 to the second duct bracket 31 previously attached to the cover support 29. It has become. In the figure, 3
Reference numeral 7 denotes a heat insulating material interposed between the duct 17 and the cover support groove bottom surface 29b.

Further, the blow-out unit 20 is composed of a pair of left and right blow-out portions 33L and 33R whose lower ends are respectively connected to the left and right duct outlets 17b. The seat backrest 6b protrudes left and right outwards, and an outlet 19 for adjusting the opening amount for blowing air from the duct 17 is provided on the upper surface of the protrusion. The outlets 33L and 33R are connected at their lower ends to the duct outlet 1
It can be easily assembled by inserting it into 7b and screwing it.

In this embodiment, the outdoor portion of the cooler device 14, such as the compressor 34, the condenser 35, and the receiver 36, is disposed in the engine room 9.

In the air conditioner constructed as described above, the indoor portion of the cooler device 14 is disposed in an inner space of a seat frame 21 on which the cockpit 6 is mounted and supported, and a main unit 16 for air-conditioning the sucked air. Is disposed behind the cockpit 6 in a state of being continuous from the main unit 16,
A duct unit 18 serving as a flow passage for the air discharged from the main unit 16 and a blowing unit 20 connected to an upper portion of the duct unit 18 and blowing out the air from the duct unit 18 are combined to form a combination of three units. And these units 16, 18, 20
Are attached to the cab 7 in a state where they are assembled in advance for each unit.

As described above, in the embodiment of the present invention, when the cooler device 14 is provided in the cab 7, only the three pre-assembled units of the main unit 16, the duct unit 18, and the blowing unit 20 are assembled. Even if the body is small, assembling work of the cooler device 14 becomes easy. Moreover, since the cooler device 14 is provided by effectively utilizing the space below and behind the cockpit 6, the cooler device 14 does not press on the operator's living space, and furthermore, the main body is provided above the rear surface of the cab. It is also possible to prevent the stay from being required as a separate part, as in the case where the unit is provided externally, and to prevent the distance from the outdoor unit from becoming long.

Further, in this embodiment, the duct unit 18 has a shape substantially along the rear side of the backrest portion 6b of the cockpit 6, so that a compact receiving state can be achieved, and the cockpit 6 and the duct unit The cockpit 6 can be slid backward until there is almost no gap between the cockpit 18. Moreover, the duct unit 18
Is a concave groove portion 29a recessed at a portion behind the cockpit 6 of the cover support 29 that separates the cockpit 6 and the engine room 9.
Therefore, even if a duct unit 18 is provided behind the cockpit 6,
Therefore, the left and right sides of the groove 29a protrude forward, so that a large space in the engine room 9 can be ensured.

In addition, the air suction port 15a of the evaporator 15 is disposed below the cockpit 6 so as to face forward, and the air outlet 19 of the air-conditioned air faces upward behind the cockpit 6. And the suction port and the blow-off port are vertically separated from each other, and the air in the cab 7 is circulated well with the air conditioning, and the air conditioning efficiency is improved. There is.

[Brief description of the drawings]

FIG. 1 is a side view of a hydraulic excavator.

FIG. 2 is a side view of the inside of the cab.

FIG. 3 is a front view of the same.

FIG. 4 is an exploded perspective view of the same.

[Explanation of symbols]

 Reference Signs List 6 cockpit 6b backrest 14 cooler device 16 main unit 18 duct unit 20 blowout unit 29 cover support 29a concave groove 29b groove bottom

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kento Hayashi 667 Iida-machi, Higashi-Izumo-cho, Yatsuka-gun, Shimane Prefecture 1 Inside Mitsubishi Agricultural Machinery Co., Ltd. 667 Machi-cho 1 Mitsubishi Agricultural Machinery Co., Ltd.

Claims (3)

[Claims] 1. In providing an air conditioner to a construction machine,
A main unit disposed below the cockpit, which air-conditions and discharges the sucked air; and a duct unit disposed behind the cockpit, which serves as a flow passage for the air discharged from the main unit. An air conditioner for a construction machine, comprising a combination of a blowout unit that is disposed above the duct unit and blows air from the duct unit. 2. The duct unit according to claim 1,
An air conditioner for construction machinery that is shaped substantially along the rear side of the cockpit backrest. 3. The partition wall according to claim 1, wherein a partition wall separating a cockpit and a rear portion of the fuselage has a substantially concave groove shape in a plan view in which a cockpit rear portion is recessed rearward and left and right side portions project forward. An air conditioner for construction equipment that has a duct unit between the groove bottom and the cockpit.