JP2002087043A - Outside air introducing mechanism for air-conditioning system for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smooth maintenance work such as cleaning and replacement of an outside air introducing filter in an air-conditioning system lily facilitating the attachment and detachment of the outside air introducing filter without an increase in size of a frame and the like. SOLUTION: The lower portion of a panel 15 at the back of a driver's cab 9 is recessed inward, and the region is used as a frame extension space 10a. The frame extension space 10a houses a filter device 17 having an outside air introducing filter 19, and an air cleaner 21 whose filter case 22 houses a detachably mounted filter unit 24. The direction of removal of an outside air introducing duct 16 in the filter device 17 is backward of the driver's cab 9 to allow displacement to a space opened EV a hinged cover 12. The filter unit 24 is directed slantingly downward and backward of the driver's cab 9. The attachment and detachment path of the outside air introducing filter 16 and the attachment and detachment path of the filter unit 24 thus overlap over a substantial reach.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine air conditioner which is mounted on a construction machine such as a hydraulic excavator and air-conditions the cab of the construction machine. It is about.

[0002]

2. Description of the Related Art In a construction machine, an operator's seat for the operator to operate the machine, an operation lever provided around the driver's seat, and an operation lever for operating the machine, a console box, etc. And an operator cab provided with other members. Since the operator operates the machine in the cab for a long time, an air conditioner, that is, an air conditioner is provided to improve the comfort of the machine. This air conditioner is for taking in outside air and performing air conditioning such as cooling and heating and dehumidification of the inside of the cab.

Here, in the air conditioner, when taking in outside air, it is necessary to improve the livability in the driver's cab by removing environmental pollutants such as dust.
For this purpose, an external air introduction filter is mounted at the entrance of the external air introduction duct or the like to remove these environmental pollutants. In particular, construction machinery operates in the open air, and operates for a long time in an environment where the amount of dust including sand and dust scatters, such as at construction sites. Inhaled. For this reason, if the outside air introduction filter attached to the outside air introduction duct is not cleaned frequently, smooth introduction of outside air cannot be performed, and the air conditioning efficiency decreases.

[0004] From the above, the outside air introduction filter is configured to be inserted into and removed from the filter case at or near the entrance of the outside air introduction duct. And
The outside air introduction filter must be able to be easily inserted into and removed from the filter case. Since the air conditioner is for air conditioning inside the cab, the air conditioner main body is disposed in the cab or at a lower position of the cab,
For this purpose, the outside air introduction duct connected to the air conditioner main body is arranged to pass through the cab. Therefore, the mounting portion of the outside air introduction filter is provided inside the cab, and in the cab,
In particular, Japanese Patent Application Laid-Open No. 9-29 discloses a configuration in which the outside air introduction filter can be taken out at the back of the driver's seat.
No. 0624 and the like.

[0005]

In the cab, an operating lever, a console box for performing various controls, and the like are arranged, and there is no space for easily inserting and removing the outside air introduction filter. In particular, if the outside air introduction filter is arranged behind the driver's seat, the outside air introduction filter must be taken out of the driver's seat and must be attached, so this work cannot always be easily performed. When removing the outside air introduction filter to which a large amount of air has adhered, there is also a problem that the adhering substance falls to the driver's seat or the like and becomes dirty.

The present invention has been made in view of the above points, and an object of the present invention is to easily attach / detach an outside air introduction filter in an air conditioner and perform maintenance work such as cleaning and replacement of the outside air introduction filter. To be able to do it.

[0007]

In order to achieve the above-mentioned object, the present invention has a building in which a driver's cab and various devices and devices are arranged, and the building is provided with an openable and closable engine cover. In the body of the construction machine provided in the, connected to the air conditioner body that air-conditions the cab of the cab, an outside air introduction duct for taking in outside air, and in order to prevent dust and the like from entering into this outside air introduction duct, A filter case provided at an outside air suction portion of the outside air introduction duct and having a filter case in which an outside air introduction filter is removably inserted, and a lower portion of a rear panel of the cab. Is depressed inward, thereby defining a space formed by the depression as an extension space of the building.In the extension space of the building, the outside air introduction duct and the filter case are arranged. Further, a device to be detached and attached at the time of maintenance is arranged in the building extension space, and a path through which this device is detached and a path through which the outside air introduction filter attached to the filter case is inserted / removed are at least partially overlapped. The feature is that.

Here, as described above, the lower side of the rear panel of the driver's cab is depressed inward in order to effectively utilize the space at the rear position of the driver's seat. In other words, a dead space in which no special device or mechanism is arranged is often located at the rear position of the driver's seat. Therefore, this space is arranged on the rear side of the cab and can be used as a space for arranging various devices and devices necessary for operating the machine. That is, the internal space of the building can be widened by functioning as an extension space of the building located on the rear side of the driver's cab. However, in this extension space of the building, it is not possible to dispose a device serving as an obstacle in a path for inserting and removing the outside air introduction filter.

The equipment arranged in the extension of the building is therefore of a certain nature in nature. An apparatus that is desirable to be disposed in the building extension space is an air cleaner for supplying clean air to the engine. Since the air cleaner requires maintenance such as cleaning of the filter unit mounted on the air cleaner and replacement of the filter, the filter unit is detachably mounted on the filter case. Therefore, a path for inserting and removing this filter unit must be ensured in this building extension space, and by extending this path and the insertion and removal path of the outside air introduction filter of the air conditioner, the extension of this building can be achieved. The space can be effectively utilized, and the building can be made smaller and more compact.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 1 shows an entire configuration of a hydraulic shovel as an example of a construction machine. In FIG. 1, reference numeral 1 denotes a crawler-type lower traveling body, and 2 denotes an upper revolving body which is rotatably installed on the lower traveling body 1 via a revolving device 3.

The upper revolving unit 2 has a revolving frame 4, and the revolving frame 4 is provided with excavating work means 8 including a boom 5, an arm 6 and a bucket 7 as working means. An operator cab 9 is provided on the upper swing body 2 so as to be aligned with the excavation work means 8. Further, a building 10 is provided at a rear position of the excavating means 8 and the operator's cab 9, and inside the building 10, various devices and devices necessary for operating the machine are installed. In addition, Building 1
The counterweight 11 is attached to the rear portion of the vehicle 0, thereby ensuring the stability of the entire vehicle during work such as excavation of earth and sand.

Here, in the building 10, devices and equipment such as an engine, a hydraulic pump, a control valve and the like are installed, and tanks such as a hydraulic oil tank and a fuel tank are also installed. The building 10 is almost entirely covered with a cover. Of the cover of building 10,
A cover 12 provided on the rear side of the cab 9 is an openable / closable cover. The opening / closing cover 12 is provided for performing maintenance such as inspection and repair of the engine and the like. The opening / closing cover 12 is formed with an outside air intake 13 for taking in cooling air such as a radiator attached to the engine. Have been.

The driver's cab 9 has a space defined by doors, windowpanes, panels, and the like. Inside the driver's cab, although not shown, is an operation for operating a machine in addition to a driver's seat. A lever, a console box and the like are arranged. An air conditioner body 14 is installed at a position below the driver's seat in the driver's cab 9, and a portion below the panel 15 on the rear side of the driver's cab is depressed inward. Therefore,
This depressed portion constitutes a part of the building 10, and is a building extension space 10a.

FIG. 2 shows the internal structure of the building extension space 10a. As is clear from this figure, the front end of the outside air introduction duct 16 to the air conditioner main body 14 is provided in the building extension space 10a. A filter device 1 for introducing outside air is provided at the outside air introduction portion at the end of the outside air introduction duct 16.
7 are provided. As is clear from FIG. 3, the filter device 17 has a filter case 1 formed in a frame shape.
8, an outside air introduction filter 19 is detachably attached to the outside air introduction filter 19. When the outside air introduction filter 19 takes in outside air into the outside air introduction duct 16, dust or the like contained in a floating state in the air is included. And guides the cleaned air from the outside air introduction duct 16 to the air conditioner main body 14. Then, with the outside air introduction filter 19 inserted into the filter case 18, the filter cap 2
0 is attached.

An air cleaner 21 is mounted in the building extension space 10a in addition to the tip of the outside air introduction duct 16 and the filter device 17. The air cleaner 12 is for supplying outside air, removing foreign matter such as dust and other contaminants, and supplying clean air to the engine when supplying air to the engine disposed inside the opening / closing cover 12. is there. Therefore, in the air cleaner 21, the filter case 22 is provided with a suction portion 23 a and a connection portion 23 b for supplying air to the engine, and a filter unit 24 is detachably mounted in the filter case 22. The air cleaner 21 has a filter case 22.
Are fixedly held by a support bracket 25, and the support bracket 25 is attached to a panel 15 at the rear of the cab 9.

Here, an external air introduction filter 19 can be inserted into and removed from a filter case 18 of the filter device 17 mounted on the external air introduction duct 16. Therefore, when the outside air introduction filter 19 in the filter device 17 is clogged with dust or the like, the outside air introduction filter 19 can be cleaned by taking out the outside air introduction filter 19. The air cleaner 21 is configured such that the filter unit 24 can be attached to and detached from the filter case 22. When the filter unit 24 becomes clogged or the like, the filter unit 24 is taken out of the filter case 22 and cleaned or replaced. To take out the outside air introduction filter 19 and the filter unit 24 to the outside, the open / close cover 12 is opened, and the filter is taken out from a portion opened by the open / close cover 12. However, the building extension space 10a in which the outside air introduction filter 19 and the filter unit 24 are provided is arranged at a position where it enters from the position of the opening / closing cover 12 toward the cab 9 side.

The filter device 17 is disposed in the building extension space 10a at a position close to the side wall of the cab 9, and when the opening / closing cover 12 is opened, the filter cap 20 is disposed immediately adjacent to the open space. Therefore, the outside air introduction filter 19 attached to the filter case 18 is removed by first removing the filter cap 20 and then pulling the outside air introduction filter 19 straight rearward along the side wall of the cab 9. On the other hand, the disposition position of the air cleaner 21 is a position at the back of the filter device 17, and is disposed higher than the filter device 17. The attitude of the air cleaner 21 attached to the support bracket 25 is such that the end on the side where the filter unit 24 is inserted / removed has an angle in a direction away from the panel 15 obliquely downward.
Therefore, in order to take out the filter unit 24 from the air cleaner 21, the filter unit 24 is drawn obliquely downward and obliquely rearward.

Therefore, the outside air introduction filter 19 is drawn straight out in the rear side shown by the arrow A in FIG. 2, that is, in the direction opposite to the cab 9, so that the space opened by the opening / closing cover 12 from this building extension space 10a. Can be smoothly moved to On the other hand, the filter unit 24 of the air cleaner 24 includes a panel 15 positioned diagonally below and at the rear of the cab 9 as shown by an arrow B in FIG.
By pulling it away from the door and further displacing it toward the opening and closing cover 12, it can be pulled out from the building extension space 10 a to the position of the space opened by the opening and closing cover 12. As described above, the path where the filter unit 24 is attached and detached crosses the path where the outside air introduction filter 19 is attached and detached, and these paths considerably overlap. However, since the outside air introduction filter 19 and the filter unit 24 are separately attached and detached, even if their attachment and detachment paths are overlapped,
Since these devices themselves are not the attachment / detachment route,
The attachment / detachment operation of the outside air introduction filter 19 and the filter unit 24 can be performed smoothly and reliably.

As described above, the lower position on the rear side of the cab 9 is defined as the building extension space 10a in the building 10, and the outside air introduction duct 1
Since the filter device 17 having the distal end portion 6 and the outside air introduction filter 19 and the air cleaner 21 are arranged, and their attachment / detachment paths are overlapped,
Compared to a case where the filter device 17 and the air cleaner 21 are arranged at different positions, and a member or the like that does not interfere with the respective attachment / detachment paths is not arranged, the space of the building 10 can be made wider and more effectively used. Become. As a result, the building 10 can be reduced in size and size, and the turning radius of the upper swing body 2 can be reduced. As described above, if the turning radius of the upper turning body 2 can be reduced, there is an advantage that work such as excavation of earth and sand can be performed smoothly even in a narrow place where an obstacle such as a structure exists in the surrounding area. is there.

[0020]

Since the present invention is constructed as described above, the outside air introduction filter in the air conditioner can be easily attached and detached without increasing the size of the building and the like, and maintenance work such as cleaning and replacement of the outside air introduction filter can be performed. And the like.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a hydraulic shovel including an air conditioner according to an embodiment of the present invention.

FIG. 2 is a configuration explanatory view showing a building extension space and members arranged inside the building extension space in the hydraulic excavator of FIG. 1;

FIG. 3 is an exploded perspective view showing the filter device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving structure 4 Revolving frame 9 Operator's cab 10 Building 10a Building extension space 12 Opening / closing cover 14 Air conditioner main body 15 Panel 16 Outside air introduction duct 17 Filter device 18 Filter case 19 Outside air introduction filter 20 Filter cap 21 Air cleaner 22 Filter Case 24 Filter unit

Claims (2)

[Claims] 1. An air conditioner having an operator's cab and a building in which various devices and devices are arranged. The building is provided with an openable and closable engine cover on a side of a construction machine body, and air-conditioning in the operator's cab. An outside air introduction duct connected to the device main body for taking in outside air, and an outside air introduction filter provided in the outside air suction portion of the outside air introduction duct to prevent dust and the like from entering the outside air introduction duct, In the outside air introduction mechanism of a construction machine air conditioner having a filter case detachably mounted, by lowering a lower portion of a rear panel of the operator cab inward, a space formed by the hollow is formed in the building. An extension space, wherein the outside air introduction duct and the filter case are disposed in the building extension space, and a machine which is detachably attached to the building extension space during maintenance. Wherein a path through which the device is attached and detached and a path through which the outside air introduction filter attached to and detached from the filter case is inserted at least partially overlap with the outside air of a construction machine air conditioner. Introduction mechanism. 2. An apparatus disposed in an extension space of the building is an air cleaner for supplying clean air to an engine, and the air cleaner is provided with a filter unit so as to be insertable and removable. Claim 1
An outside air introduction mechanism of the air conditioner for construction machines according to the above.