JP4717858B2 - Air conditioning equipment for construction machinery - Google Patents

Description

  The present invention relates to an air conditioner for a construction machine, and more particularly to an air conditioner for a construction machine that facilitates the attachment / detachment operation of an outside air filter.

  A conventional air conditioner for this type of construction machine has a main body provided in a cab, and is configured to be able to switch between internal air circulation and external air introduction. For example, the outside air introduction part is formed separately from the inside / outside air switching part, and the outside air introduction part is inserted and attached to the attachment hole drilled in the rear surface of the cab from the outside, via the connection port and the connection pipe. The inside / outside air switching unit and the outside air introduction unit are connected to assemble the air conditioner, whereby the inside / outside air switching unit and the cab are separated, and the air conditioning unit body and the inside / outside air switching unit are installed in advance on the floor board. An air conditioner that makes it possible is known (see Patent Document 1).

  6 to 8 show a configuration in which an outside air inlet is provided on the back surface of the cab. As shown in FIG. 6, an operator seat 51 is installed at a substantially central position in the cab 50. A door 53 that opens and closes the entrance 52 is attached. An air conditioner 60 is installed at the rear of the seat 51, and an outside air inlet 61 is provided on the back surface of the cab 50. A drive device (not shown) such as an engine or a hydraulic device is mounted behind the cab 50 and is covered with a house cover 54.

  As shown in FIG. 7, the air conditioner 60 is provided with an outside air filter box 62 inside the outside air inlet 61, and an outside air filter 63 is accommodated in the outside air filter box 62. The air conditioner 60 is provided with an inside air introduction port 64 in addition to the outside air introduction port 61, and the inside air filter 66 is housed in an inside air filter box 65 provided inside the inside air introduction port 64. The air taken in by circulating inside air or introducing outside air is air-conditioned by the air conditioner unit 67, passes through the duct 68, and is sent out from the outlet 69 into the cab 50. On the other hand, the house cover 54 disposed behind the cab 50 is attached to the house frame 55 so as to be openable and detachable. A frame cover 56 is attached at a position facing the outside air inlet 61.

  As shown in FIG. 8, during maintenance of the air conditioner 60, the inside air filter 66 can be easily removed and cleaned by pulling the inside air filter 66 forward from the inside air filter box 65. On the other hand, when cleaning the outside air filter 63, first, after opening the house cover 54, the frame cover 56 is further removed, and the outside air filter 63 is taken out behind the cab 50 and cleaned.

  9 to 11 show a configuration in which an outside air introduction port is provided on the side surface of the cab, and as shown in FIGS. An inspection cover 70 to be covered is attached to the side surface of the cab 50 through a hinge 71 so as to be opened and closed. The inspection cover 70 has a plurality of small windows 72 for taking in air.

  As shown in FIG. 11, in the maintenance of the air conditioner 60, the inspection cover 70 is opened and the outside air filter 63 is taken out to the side of the cab 50, while the inside air filter 66 is drawn forward, and each filter is removed. to clean up.

In addition, a door for opening and closing the entrance / exit is attached to the center pillar via a hinge on the left side surface of the cab, and an opening for maintenance and inspection of the outside air filter (outside air inlet) is provided at the lower side of the side surface behind the door. There is also known a configuration in which an inspection cover for opening and closing the maintenance inspection opening is attached so as to be openable and closable using the door hinge (see Patent Document 2).
JP-A-6-199125 JP 2006-57245 A

  As shown in Patent Document 1 and FIGS. 6 to 8, in the configuration in which the outside air inlet and the outside air filter are provided on the back surface of the cab, when the outside air filter is attached and detached, the house cover is opened, and the frame cover is further opened. Must be removed.

  As shown in Patent Document 2 and FIGS. 9 to 11, in the configuration in which the outside air inlet and the outside air filter are provided on the side surface of the cab, the outside air filter can be attached and detached relatively easily by opening the inspection cover. However, since a hinge is provided on the side of the cab and the inspection cover is attached, the cost increases and the aesthetic appearance of the entire cab is impaired.

  In any configuration, the inside air filter is attached and detached at the cab door, and the outside air filter is attached and detached at the back or side of the cab, so that the cleaning work becomes complicated and the burden on the operator increases.

  Therefore, in an air conditioner for a construction machine, there is a technical problem to be solved in order to make it possible to remove the outside air filter from the door of the cab and facilitate the attachment / detachment work of the inside air filter and the outside air filter. The present invention aims to solve this problem.

The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is characterized in that the main body is provided in the cab of the construction machine and is configured to be able to switch between the inside air circulation and the outside air introduction. In the outside side of the cab on the door side, an outside air inlet is installed at the door rear position ,
An outside air filter box is installed inside the outside air introduction port to store the outside air filter, the outside air filter box is extended to the vicinity of the entrance / exit and the door in the cab, and the outside air filter is moved from the storage position to the entrance / exit and the door. Until it slides along the outer side of the door
The outside air filter is provided with a grip portion in the direction of the entrance / exit and the door, and the tip of the grip portion is extended to the vicinity of the entrance / exit of the outside air filter box and the door,
Install the inside air inlet and the inside air filter inside the extended part of the outside air filter box,
Providing an air conditioning system for a construction machine, characterized in that the fresh air filter and the inside air filter detachably formed in entrance and near the door.

  According to this configuration, the outside air around the cab is introduced from the outside air introduction port installed on the outer side surface of the cab door side, and the dust contained in the outside air by the outside air filter arranged inside the outside air introduction port. The foreign matter is removed and introduced into the air conditioner. The outside air filter can be attached and detached from the door portion.

  According to this configuration, the outside air filter is housed in the outside air filter box installed inside the outside air inlet, and can be slid from the housing position to the door portion. Pull out the filter and take out the outside air filter from the door.

  According to this configuration, since the outside air filter is provided with the grip portion and extends to the vicinity of the door portion, the outside air filter can be detached from the door portion by gripping and pulling out the grip portion.

  According to this configuration, since the inside air introduction port and the inside air filter are installed inside the outside air filter box, both the inside air filter and the outside air filter can be detached from the door portion.

According to the first aspect of the present invention, an outside air introduction port is provided on the outer surface of the cab door side, and an outside air filter disposed inside the outside air introduction port is formed so as to be detachable from the vicinity of the door. In addition to removing foreign matter such as dust, the outside air filter can be attached and detached without removing the house cover and frame cover during maintenance. Therefore, the outside air filter can be easily attached and detached, and the workability can be improved. Further, since the inspection cover is not attached to the side surface of the cab with a hinge or the like, the aesthetic appearance of the entire cab can be improved.

This invention, outside air filter housing by installing a fresh air filter box inside the outside air introduction port, the outside air filter box is extended until door near neighbor in the cab, stored position Karado vicinity A of the outside air filter Having slidably formed to, in addition to the above effects, it can be taken out outside air filter from the vicinity door pull the outside air filter from the storage position.

This invention, the grip portion in the door direction is provided in the outside air filter, since the extended tip of the grasping portion to the door near vicinity of the outside air filter box, in addition to the above effects, by holding the holding portion by drawing, it can be easily attached and detached outside air filter from the vicinity door.

In addition to the above effects, the inside air inlet and the inside air filter are installed inside the outside air filter box, and the outside air filter and the inside air filter are formed so as to be detachable in the vicinity of the entrance / exit and the door. Thus, the burden on the operator can be reduced.

  Hereinafter, a construction machine air conditioner according to the present invention will be described with reference to preferred embodiments. In order to achieve the purpose of allowing the outside air filter to be removed from the door portion of the cab and facilitating the attaching / detaching work of the inside air filter and the outside air filter, the present invention provides a main body within the cab of the construction machine, In an air conditioner configured to be able to switch between circulation and outside air introduction, an outside air introduction port is installed on the outer surface of the cab on the door side, and an outside air filter disposed inside the outside air introduction port can be detached from the door part. Realized by forming.

  FIG. 1 shows a hydraulic excavator 10 as an example of a construction machine, and an upper swing body 13 is mounted on a lower traveling body 11 via a swing mechanism 12 so as to be rotatable. The upper swing body 13 is provided with a cab 14 on one front side thereof, and a drive device 15 such as an engine or a hydraulic device is mounted behind the cab 14 and is covered with a house cover 16. Moreover, the boom 17 is attached to the front center part of the upper turning body 13 so that elevation is possible. Further, an arm 18 is attached to the tip of the boom 17 so as to be rotatable up and down, and a bucket 19 is attached to the tip of the arm 18.

  An operator seat 21 is installed at a substantially central position in the cab 14, and a door 23 for opening and closing the entrance 22 is attached to one side surface of the cab 14. An air conditioner 30 is installed at the rear of the seat 21, and an outside air inlet 31 is provided on the side surface of the cab 14. The outside air introduction port 31 is not provided with an inspection cover like the conventional type shown in FIG. 9, and the outside air introduction port 31 is formed by opening only a small window on the side surface of the cab 14.

  As shown in FIGS. 2 to 4, in the air conditioner 30, an outside air filter box 32 is installed inside the outside air inlet 31, and an outside air filter 33 is accommodated in the outside air filter box 32. The outside air filter box 32 extends in the cab 14 to the vicinity of the entrance / exit 22 and the door 23 (hereinafter referred to as a door portion), and the outside air filter 33 is formed so as to be slidable from the illustrated storage position to the door portion. Has been.

  The air conditioner 30 is provided with an inside air introduction port 34 in addition to the outside air introduction port 31, and an inside air filter 36 is housed in an inside air filter box 35 provided inside the inside air introduction port 34. Air taken in by circulating inside air or introducing outside air is air-conditioned by an air conditioner unit 37 that is an air conditioner body, passes through a duct 38, and is sent out from the outlet 39 into the cab 14.

  Here, the outside air filter 33 is provided with a gripping portion 40 in the direction of the door, and the tip of the gripping portion 40 extends to the vicinity of the door portion of the outside air filter box 32 and slightly protrudes from the outside air filter box 32, It forms so that the front-end | tip of the holding part 40 can be hold | gripped from a door part. The inside air filter 36 is also provided with a grip 41 in the direction of the door, and the tip of the grip 41 protrudes slightly from the inside air filter box 35 so that the tip of the grip 41 can be gripped from the door. Yes.

  As shown in FIG. 5, during the maintenance of the air conditioner 30, the grip portion 41 of the inside air filter 36 is gripped and pulled forward from the inside air filter box 35, and the inside air filter 36 is removed. Similarly, with respect to the outside air filter 33, the grasping portion 40 is grasped and pulled out from the outside air filter box 32 to remove the outside air filter 33.

  As described above, when the outside air filter 33 is attached or detached, the outside air filter 33 can be easily taken out from the door portion without removing the house cover or the frame cover as in the conventional type, and the inside air filter 36 and the outside air filter 33 can be removed. Since both the filters can be easily attached / detached from the door portion, the attaching / detaching operation of the filter becomes simple, and the burden on the operator can be reduced. In addition, since the inspection cover is not attached to the side surface of the cab 14 with a hinge or the like, the aesthetic appearance of the entire cab 14 can be improved.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

1 is a side view of a hydraulic excavator to which the present invention is applied. The top view which shows the state at the time of operation | movement of the air conditioner which concerns on this invention. The rear view which shows the state at the time of the operation | movement of the air conditioner which concerns on this invention. The perspective view of the external air filter of the air conditioner which concerns on this invention. The top view which shows the state at the time of the maintenance of the air conditioner which concerns on this invention. The side view which shows the structure which provided the external air inlet in the cab back surface with the conventional air conditioner. The top view which shows the state at the time of the operation | movement of the air conditioner of FIG. The top view which shows the state at the time of the maintenance of the air conditioner of FIG. The side view which shows the structure which provided the external air inlet in the cab side surface with the conventional air conditioner. The top view which shows the state at the time of the operation | movement of the air conditioner of FIG. The top view which shows the state at the time of the maintenance of the air conditioner of FIG.

Explanation of symbols

10 Excavator 14 Cab 22 Entrance (door)
23 Door (door part)
30 Air Conditioner 31 Outside Air Inlet 32 Outside Air Filter Box 33 Outside Air Filter 34 Inside Air Inlet 35 Inside Air Filter Box 36 Inside Air Filter 37 Air Conditioner Unit (Main Body)
40 gripping part

Claims (1)

In the air conditioner provided with a main body in the cab of the construction machine and capable of switching between inside air circulation and outside air introduction, an outside air introduction port is installed at the rear side position of the door on the outer side surface of the cab door,
An outside air filter box is installed inside the outside air introduction port to store the outside air filter, the outside air filter box is extended to the vicinity of the entrance / exit and the door in the cab, and the outside air filter is moved from the storage position to the entrance / exit and the door. Until it slides along the outer side of the door
The outside air filter is provided with a grip portion in the direction of the entrance / exit and the door, and the tip of the grip portion is extended to the vicinity of the entrance / exit of the outside air filter box and the door,
Install the inside air inlet and the inside air filter inside the extended part of the outside air filter box,
An air conditioner for a construction machine, characterized in that the outside air filter and the inside air filter are detachable in the vicinity of the entrance / exit and the door.

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