JP3738680B2 - Outside air introduction mechanism of air conditioner for construction machinery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outside air introduction mechanism including an outside air introduction duct provided with an outside air introduction filter in an air conditioner for a construction machine that is installed in a construction machine such as a hydraulic excavator and performs air conditioning in its cab.
[0002]
[Prior art]
In a construction machine, in order for an operator to operate the machine, a driver's seat for the operator to sit, and an operation lever, a console box, and other members provided around the driver's seat for operating the machine A provided cab is provided. Since the operator operates the machine for a long time in the cab, an air conditioner, that is, an air conditioner is installed in order to improve the comfort of the operator. This air conditioner is for taking in outside air and performing air conditioning such as air conditioning and dehumidification inside the cab.
[0003]
Here, in the air conditioner, when the outside air is taken in, it is necessary to improve the comfortability in the cab by removing environmental pollutants such as dust. An outside air introduction filter is attached to remove these environmental pollutants. In particular, since construction machines operate outdoors and operate for a long time in an environment where there is a large amount of dust containing dust, such as construction sites, a large amount of dust etc. Inhaled. For this reason, unless the outside air introduction filter attached to the outside air introduction duct is frequently cleaned, the outside air cannot be smoothly introduced, and the air conditioning efficiency is lowered.
[0004]
From the above, the outside air introduction filter is configured to be detachable from the filter case at the inlet portion of the outside air introduction duct or in the vicinity thereof. 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 the inside of the cab, the air conditioner main body is arranged in the cab or in the lower position of the cab, and the outside air introduction duct connected to the air conditioner main body is operated for this purpose. Arranged through the room. Accordingly, an outside air introduction filter mounting portion is provided inside the cab so that the outside air introduction filter can be taken out in the cab, particularly at the back of the driver's seat, for example, Japanese Patent Laid-Open No. 9-290624. It is shown in the gazette.
[0005]
[Problems to be solved by the invention]
An operation lever, a console box for performing various controls, and the like are arranged in the cab, and there is no space where the outside air introduction filter can be easily inserted and removed. In particular, if an outside air introduction filter is arranged at the back of the driver's seat, the outside air introduction filter must be taken out and attached so as to get over the driver's seat. When the outside air introduction filter with a large amount of adhering is removed, the adhering matter falls to the driver's seat and becomes dirty.
[0006]
The present invention has been made in view of the above points, and an object of the present invention is to allow an outside air introduction filter in an air conditioner to be easily attached and detached, and to perform maintenance work such as cleaning and replacement of the outside air introduction filter. There is to do.
[0007]
[Means for Solving the Problems]
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 has a car body of a construction machine provided with an openable engine cover on its side. Connected to the air conditioner main body that air-conditions the driver's cab, the outside air introduction duct for taking in outside air, and the outside air inlet duct of the outside air introduction duct to prevent dust and the like from entering the outside air introduction duct An outside air introduction mechanism for an air conditioner for a construction machine provided with a filter case on which an outside air introduction filter is removably mounted, wherein the operator's cab is provided with a rear panel that forms a section with the building at the rear thereof. is and the lower portion of the rear panel by depressing toward the inner side of the cab, building extended space and without communicating the space formed inside of the building by the recess, the building extension In the space, and the outside air inlet duct, said filter casing is arranged to place the other equipment is further removably during maintenance, and the route which the device is detached, the outside air introduction filter mounted on the filter case It is characterized in that it is configured to at least partially overlap the path to be inserted and removed.
[0008]
Here, as described above, the lower side of the rear panel of the driver's cab is recessed inward to effectively utilize the space at the rear portion of the driver's seat. In other words, the rear position of the driver's seat often becomes a dead space where no special equipment or mechanism is arranged. 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 the operation of 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 cab. However, in this building extension space, an apparatus that becomes an obstacle cannot be placed on a path through which the outside air introduction filter is inserted and removed.
[0009]
The equipment placed in the building extension space is therefore of a certain limited nature. A desirable device to be placed 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 the filter unit attached to the air cleaner and replacing the filter, the filter unit is detachably attached to the filter case. Therefore, a path for inserting / removing the filter unit must be secured in the extension space of the building, and the extension of the building can be achieved by overlapping this path with the insertion / removal path of the outside air introduction filter of the air conditioner. Effective use of space can be achieved, and the building can be made smaller and more compact.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, FIG. 1 shows an overall configuration of a hydraulic excavator as an example of a construction machine. In the figure, 1 is a crawler type lower traveling body, and 2 is an upper revolving body installed on the lower traveling body 1 via a turning device 3 so as to be able to turn.
[0011]
The upper swing body 2 has a swing frame 4, and the swing frame 4 includes excavation work means 8 including a boom 5, an arm 6, and a bucket 7 as work means. A cab 9 is installed on the upper swing body 2 so as to be aligned with the excavation work means 8. Further, a building 10 is provided at the rear position of the excavation work means 8 and the cab 9, and various devices and devices necessary for operating the machine are installed in the building 10. Furthermore, a counterweight 11 is attached to the rear position of the building 10, thereby ensuring the stability of the entire vehicle during work such as excavation of earth and sand.
[0012]
Here, in the building 10, devices and devices such as an engine, a hydraulic pump, and a control valve 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. Among the covers of the building 10, the 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 portion 13 for taking in cooling air such as a radiator attached to the engine. Has been.
[0013]
The driver's cab 9 has a space defined by doors, window glass, panels, and the like. Although not shown in the drawing, in addition to the driver's seat, an operation lever or console for operating the machine or the like is provided. Boxes are arranged. An air conditioner main body 14 is installed at a lower position of the driver's seat in the driver's cab 9, and a portion below the panel 15 on the rear side from the driver's cab is recessed inward. Therefore, this depressed portion constitutes a part of the building 10 and is a building extension space 10a.
[0014]
FIG. 2 shows an internal configuration of the building extension space 10a. As is clear from this figure, the building extension space 10a is provided with the front end portion of the outside air introduction duct 16 facing the air conditioner body 14 facing it. A filter device 17 for introducing outside air is provided at the outside air introduction portion at the tip of the outside air introduction duct 16. As apparent from FIG. 3, the filter device 17 is configured such that an outside air introduction filter 19 is detachably attached to a filter case 18 formed in a frame shape. The outside air introduction filter 19 is an outside air introduction duct. When the outside air is taken into 16, dust and the like contained in the air in a floating state are captured, and the cleaned air is guided from the outside air introduction duct 16 to the air conditioner main body 14. The filter cap 20 is attached with the outside air introduction filter 19 inserted into the filter case 18.
[0015]
An air cleaner 21 is installed in the building extension space 10 a in addition to the tip of the outside air introduction duct 16 and the filter device 17. When air is supplied to the engine disposed inside the opening / closing cover 12, the air cleaner 12 takes in outside air, removes foreign matters such as dust and other contaminants, and supplies clean air to the engine. is there. Accordingly, in the air cleaner 21, the filter case 22 is provided with the suction portion 23 a and the connection portion 23 b of the air supply pipe to the engine, and the filter unit 24 is detachably mounted in the filter case 22. The air cleaner 21 has a filter case 22 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.
[0016]
Here, in the filter device 17 attached to the outside air introduction duct 16, the outside air introduction filter 19 can be inserted into and removed from the filter case 18. Accordingly, 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 removed to be cleaned. Further, the air cleaner 21 is configured so that the filter unit 24 can be attached to and detached from the filter case 22. When the filter unit 24 is clogged or the like, the air cleaner 21 is taken out from the filter case 22 and cleaned or replaced. In order to take out the outside air introduction filter 19 and the filter unit 24 to the outside, the opening / closing cover 12 is opened, and the outside air introduction filter 19 and the filter unit 24 are taken out from the part opened by the opening / closing cover 12. However, the building extension space 10a in which the outside air introduction filter 19 and the filter unit 24 are provided is disposed at a position where it enters from the position of the opening / closing cover 12 toward the cab 9 side.
[0017]
In the building extension space 10a, the filter device 17 is disposed at a position close to the side wall of the cab 9. When the opening / closing cover 12 is opened, the filter cap 20 is disposed at a position closest to the open space. Therefore, the outside air introduction filter 19 attached to the filter case 18 is taken out by first pulling the outside air introduction filter 19 straight back along the side wall of the cab 9 after removing the filter cap 20. On the other hand, the air cleaner 21 is disposed at the back of the filter device 17 and at a higher position than the filter device 17. In addition, as the posture state of the air cleaner 21 attached to the support bracket 25, the end on the side where the filter unit 24 is inserted and removed is angled 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.
[0018]
Accordingly, the outside air introduction filter 19 is drawn straight out from the rear side indicated by the arrow A in FIG. 2, that is, in the direction opposite to the cab 9. Can be moved to. On the other hand, the filter unit 24 of the air cleaner 24 is pulled out in a direction obliquely downward and away from the panel 15 located at the rear of the cab 9 as shown by an arrow B in FIG. By doing so, it can be pulled out from the building extension space 10a to the position of the space opened by the opening / closing cover 12. As described above, the path on which the filter unit 24 is attached / detached crosses the path on which the outside air introduction filter 19 is attached / detached, and these paths are considerably overlapped. However, since the outside air introduction filter 19 and the filter unit 24 are attached and detached separately, even if their attachment / detachment paths overlap, these devices themselves are not attachment / detachment paths. The filter unit 24 can be attached and detached smoothly and reliably.
[0019]
As described above, the lower position on the rear side of the cab 9 is the building extension space 10a in the building 10, and the filter device 17 having the front end portion of the outside air introduction duct 16 and the outside air introduction filter 19 at the position of the building extension space 10a; Further, since the air cleaner 21 is arranged and the attachment / detachment paths thereof are overlapped, the filter device 17 and the air cleaner 21 are arranged at different positions so as not to arrange a member that interferes with each attachment / detachment path. Compared to the case where it is configured as described above, the space of the building 10 can be widened and used effectively. 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. Thus, when the turning radius of the upper turning body 2 can be reduced, there is an advantage that the work such as excavation of earth and sand can be smoothly performed even in a narrow place where obstacles such as structures exist around. is there.
[0020]
【The invention's effect】
Since the present invention is configured 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 structure, etc., and maintenance work such as cleaning and replacement of the outside air introduction filter can be performed smoothly. The effect of.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a hydraulic excavator provided with an air conditioner according to an embodiment of the present invention.
2 is a configuration explanatory view showing a building extension space and members disposed in the interior of the hydraulic excavator of FIG. 1; FIG.
FIG. 3 is an exploded perspective view showing the filter device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving body 4 Swing frame 9 Driver'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)

It has a building with a cab and various equipment and devices, and the building is connected to the body of a construction machine that has an engine cover that can be opened and closed. The outside air introduction duct for taking in outside air, and the outside air introduction duct of the outside air introduction duct are detachably mounted in order to prevent dust and the like from entering the outside air introduction duct. In the outside air introduction mechanism of the air conditioner for construction machinery provided with a filter case,
The driver's cab is provided with a rear panel that forms a rear surface of the indoor space and forms a partition with the building,
The lower part of the rear panel is recessed toward the inside of the operator's cab, and the space formed by the depression is a building extension space that leads to the interior of the building,
In this building extension space, arrange the outside air introduction duct and the filter case, and further arrange other equipment to be attached and detached during maintenance,
An outside air introduction mechanism for an air conditioner for a construction machine, characterized in that a path for attaching and detaching the device and a path for inserting and removing the outside air introduction filter attached to the filter case are at least partially overlapped.   The device arranged in the extension space of the building is an air cleaner for supplying clean air to the engine, and the air cleaner is configured to be provided with a filter unit so that it can be inserted and removed. The outside air introduction mechanism of the air conditioner for a construction machine described.

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