JP2012106534A - Air conditioner of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner of a construction machine, which allows maintenance of an outside air filter and an inner air filter to be carried out simultaneously, thereby simplifies this work.SOLUTION: The air conditioner of the construction machine includes an air-conditioning unit 24 disposed in a cab 15 demarcating a driver's compartment. An air inlet 22 of the air-conditioning unit 24 is connected to an outside air suction port 25 which sicks in air outside the cab through an outside air filter 30a and to an inner air suction port 26 which sucks in air inside the cab through an inside air filter 30b. The outside air filter 30a and the inside air filter 30b are integrated into a filter unit 30, the filter unit 30 is attached detachably to the air-conditioning unit 24.

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 harmonizes air in a cab in a construction machine such as a hydraulic excavator or a hydraulic crane.

  In general, a construction machine such as a hydraulic excavator or a hydraulic crane includes a lower traveling body, an upper swinging body that is turnably mounted on the lower traveling body, and a work device that is provided on the upper swinging body so as to be able to be raised and lowered. And a cab having a driver's seat on which an operator sits is provided on the frame of the upper swing body. The cab is provided with an air conditioner that blows conditioned air consisting of cold air or warm air into the cab to adjust the cab to a desired temperature (see, for example, Patent Document 1).

  FIG. 5 schematically shows the internal structure of a cab in a conventional hydraulic excavator. In the figure, inside the cab 101 is a seating seat 102 on which an operator is seated for driving operation, left and right operating lever devices 103, 103 used for driving operation by the seated operator, and the cab An air conditioner 104 for supplying conditioned air is provided in 101.

  Further, on one side surface of the cab 101, an entrance / exit 106 to which an openable / closable entrance / exit door 105 is attached and an opening 107 for the outside of the air conditioner 104 to take in outside air are provided.

  The air conditioner 104 is provided behind the seating seat 102, and has an air conditioning unit 110 that incorporates an evaporator, a heater (both not shown), and the like. Further, the air conditioning unit 110 is provided with inlets 108 a and 108 b and an outlet 109, so that the air sucked from the inlets 108 a and 108 b is harmonized and the conditioned air is discharged from the outlet 109. It has become.

  Further, an outside air intake duct 112 having an outside air inlet 111 for taking in outside air through the opening 107 of the cab 101 is connected to the inlet 108a of the air conditioning unit 110, and the inside of the cab 101 is connected to the inlet 108b. The inside air suction duct 114 having the inside air suction port 113 for taking in the air is connected.

  Meanwhile, a conditioned air supply duct 116 is connected to the outlet 109 of the air conditioning unit 110. The conditioned air supply duct 116 conveys conditioned air discharged from the outlet 109 of the air conditioning unit 110 to a predetermined position in the cab 101, and a conditioned air outlet 115 is provided on the outlet side. Provided.

  The outside air suction duct 112 is attached with an outside air filter 117 for removing dust in the outside air sucked into the air conditioning unit 110 from the outside air suction port 111, and the inside air suction duct 114 is provided with the inside air suction port. An inside air filter 118 for removing dust in the inside air sucked into the air conditioning unit 110 from 113 is attached. The outside air filter 117 is detachably attached to the outside air suction duct 112 through an opening 119 provided on the side surface of the outside air suction duct 112, and the inside air filter 118 is attached to the side surface of the inside air suction duct 114. Through the provided opening 120, the inside air suction duct 114 is detachably attached.

  The air conditioner configured as described above sucks outside air from the outside air intake duct 112 and inside air from the inside air suction duct 114 into the air conditioning unit 110, and harmonizes with a predetermined temperature or the like in the air conditioning unit 110. The conditioned air is blown into the cab 101 from the conditioned air outlet 115 of the conditioned air supply duct 116, whereby the temperature in the cab 101 can be adjusted according to the preference of the operator. it can.

JP 2004-142663 A.

  As described above, in an air conditioner for a conventional construction machine, the outside air filter 117 that removes dust in the outside air sucked into the air conditioning unit 110 from outside the cab 101, and the inside of the cab 101 into the air conditioning unit 110. The inside air filter 118 for removing dust in the inside air to be sucked is formed separately. Moreover, the outside air filter 117 and the inside air filter 118 are detachably attached separately from the outside air suction duct 112 and the inside air suction duct 114 which are arranged at positions separated from each other.

  By the way, the outside air filter 117 and the inside air filter 118 need to be subjected to maintenance such as cleaning or replacement at a necessary time. In this maintenance, the air-conditioning function may be impaired unless both filters 117 and 118 are maintained at the same time. Therefore, generally, maintenance of the filters 117 and 118 is performed at the same time.

  However, although the maintenance of the filters 117 and 118 is performed at the same time, the outside air filter 117 and the inside air filter 118 are provided at positions far away from each other. There is a need to do. For this reason, there has been a problem that the maintenance work is troublesome.

  Thus, there is a technical problem to be solved in order to be able to perform maintenance work of the outside air filter and the inside air filter at the same time, and to simplify the work, and the present invention provides this problem. The purpose is to solve.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 includes an air conditioning unit provided in a cab that defines an operator cab, and the air flow of the air conditioning unit. In the air conditioner for a construction machine, wherein the inlet side is connected to an outside air suction port for sucking air outside the cab via an outside air filter and an inside air suction port for sucking air inside the cab via an inside air filter, the outside air filter And an inside air filter are integrated as a filter unit, and an air conditioner for a construction machine is provided in which the filter unit is detachably attached to the air conditioning unit.

  According to this configuration, since the outside air filter and the inside air filter are integrated as a filter unit, both filters can be detached at the same time and maintenance can be performed at the same time.

  According to a second aspect of the present invention, there is provided an air conditioner for a construction machine according to the first aspect, wherein a filter unit mounting portion for detachably mounting the filter unit is provided in the cab.

  According to this configuration, when performing the work of attaching and detaching the filter unit, the operator can work in the cab. There is no need to provide it.

  According to the first aspect of the present invention, the maintenance work can be performed by attaching and detaching the outside air filter and the inside air filter at the same time during maintenance work or the like, so that the number of work steps can be reduced and workability can be expected to be improved. Further, since it is possible to prevent the maintenance of one filter and forgetting the maintenance of the other filter, an improvement in reliability in maintenance work can be expected.

  According to the second aspect of the present invention, since the filter unit can be attached / detached inside the cab, it is not necessary to provide an opening / closing cover for attaching / detaching the filter unit to / from the cab. Thereby, in addition to the effect of the invention of claim 1, the cab can be reduced in size and weight. In addition, the measures for preventing water intrusion into the filter are eliminated, the design can be simplified, and the design freedom can be expected to increase.

1 is an overall side view of a hydraulic excavator to which an air conditioner according to an embodiment of the present invention is applied. FIG. 2 is a plan view showing a part of the cab of the hydraulic excavator shown in FIG. It is a principal part enlarged plan view of an air conditioner same as the above. It is a schematic perspective view which shows the air-conditioning unit of the air-conditioning apparatus main part shown in FIG. 3, a suction duct, etc. in the state which pulled out the filter unit. It is a top view which fractures | ruptures a part of cab in the conventional hydraulic shovel, and shows the inside of the cab.

  The present invention has an air conditioning unit provided in a cab that defines an operator cab in order to achieve the purpose of simplifying the work by allowing maintenance work of the outside air filter and the inside air filter to be performed simultaneously. A construction machine in which the air inlet side of the air conditioning unit is connected to an outside air suction port for sucking air outside the cab via an outside air filter and an inside air suction port for sucking air inside the cab via an inside air filter This air conditioner is realized by integrating the outside air filter and the inside air filter as a filter unit, and detachably attaching the filter unit to the air conditioning unit.

  Hereinafter, a preferred embodiment of an air conditioner for a construction machine according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is an overall side view of a hydraulic excavator that is a construction machine to which an air conditioner according to an embodiment of the present invention is applied. In FIG. 1, a hydraulic excavator 10 includes a lower traveling body 11, an upper revolving body 12 that is turnably mounted on the lower traveling body 11, and a working device 13 that is provided on the upper revolving body 12 so as to be able to move up and down. Etc. A cab 15 that defines a cab is provided on the main body frame 14 of the upper swing body 12.

  FIG. 2 is a diagram schematically showing the inside of the cab 15. In the figure, inside the cab 15 is a seat 16 on which an operator is seated, left and right operation lever devices 17 and 17 used for operating the seated operator, and conditioned air in the cab 15. The air conditioner 18 etc. which supply are provided. In addition, on one side surface of the cab 15, there is provided an entrance 20 that is provided with a door 19 that can be opened and closed, and an opening 21 through which the air conditioner 18 takes outside air.

  The air conditioner 18 is provided behind the seating seat 16 as shown in FIG. 2, and has an air conditioning unit 24 that incorporates an evaporator, a heater (both not shown), and the like. In addition, the air conditioning unit 24 is provided with an inlet 22 and an outlet 23 to harmonize air sucked from the inlet 22 and discharge the conditioned air from the outlet 23. .

  In addition, an outlet side of a suction duct 27 is connected to the inlet 22 of the air conditioning unit 24. As shown in FIGS. 2 to 4, at the inlet side of the suction duct 27, an outside air suction port 25 that sucks air outside the cab 15 through the opening 21 and an inside air suction port 26 that sucks air inside the cab 15. Is provided.

  On the other hand, an inlet side of a conditioned air supply duct 29 is connected to the outlet 23 of the air conditioning unit 24. The conditioned air supply duct 29 is a duct that conveys conditioned air discharged from the outlet 23 of the air conditioning unit 24 to a predetermined position in the cab 15 (for example, in front of the seating seat 16). A conditioned air outlet 28 is provided on the outlet side.

  A filter unit 30 is detachably attached to the suction duct 27. As shown in FIGS. 2 to 4, the filter unit 30 includes an outside air filter 30 a that removes dust in the outside air sucked from the outside air suction port 25, and an inside air filter that removes dust in the inside air sucked from the inside air suction port 26. 30b is integrated in a state of being arranged in a plane, and is united as a single filter. The filter unit 30 is inserted into the suction duct 27 through an opening 31 provided on the upper side surface of the suction duct 27 in the cab 15 (a filter mounting portion of the suction duct 27). On the other hand, it can be removed from the suction duct 27 by pulling upward. 2 and 3 show a state where the filter unit 30 is inserted into the suction duct 27 and is attached to a predetermined position, and FIG. 4 shows a state where the filter unit 30 is removed from the suction duct 27. Yes.

  When the filter unit 30 is attached to the filter mounting position in the suction duct 27, the outside air filter 30a closes the passage of the outside air suction port 25, and the inside air filter 30b passes the passage of the inside air suction port 26. It is arranged by blocking. In this way, the filter unit 30 attached in the suction duct 27 has the inside air sucked in from the inside air suction port 26 by removing the dust in the outside air sucked from the outside air suction port 25 by the outside air filter 30a. The inside air filter 30b can remove the dust.

  The air conditioner configured as described above sucks outside air and inside air into the air conditioning unit 24 from the outside air suction port 25 and the inside air suction port 26, and harmonizes with a predetermined temperature or the like in the air conditioning unit 24. By blowing out the conditioned air from the conditioned air outlet 28 of the conditioned air supply duct 29 into the cab 15, the temperature in the cab 15 can be adjusted according to the preference of the operator.

  Further, when the outside air filter 30a and the inside air filter 30b come to a time when maintenance such as cleaning or replacement is necessary, a handle portion 32 provided on the upper surface portion of the filter unit 30 in the cab 15. When the filter unit 30 is lifted upward, the outside air filter 30a and the inside air filter 30b can be removed from the suction duct 27 at the same time. On the other hand, after maintenance, by returning the filter unit 30 into the suction duct 27 through the opening 31, the outside air filter 30a and the inside air filter 30b are returned at the same time, and necessary maintenance work can be completed. .

  Therefore, according to the air conditioner of the present embodiment, the outside air filter 30a and the inside air filter 30b are integrated as a filter unit. Therefore, when performing maintenance or the like, both the filters 30a and 30b are removed at the same time and work is performed simultaneously. Can do. Thereby, the work man-hour can be reduced. In addition, it is possible to reliably prevent maintenance of one filter and forgetting maintenance of the other filter.

  In the above embodiment, the filter unit 30 has a structure in which the outside air filter 30a and the inside air filter 30b are arranged in the horizontal direction and are moved up and down to be attached and detached. However, the filter unit 30 is moved in the left and right direction and is attached and detached. It may be. Furthermore, the outside air filter 30a and the inside air filter 30b may be arranged in the vertical direction, and may be attached or detached by moving in the vertical direction or the horizontal direction.

  In addition to this, 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.

  As described above, the present invention is not limited to an air conditioner for a construction machine, but can be applied to an air conditioner for a vehicle other than a construction machine.

14 body frame 15 cab 16 seating seat 17 operating lever 18 air conditioner 21 outside air opening 22 inlet 23 outlet 24 air conditioning unit 25 outside air inlet 26 inside air inlet 27 suction duct 28 conditioned air outlet 29 conditioned air supply duct 30 Filter unit 30a Outside air filter 30b Inside air filter 31 Opening (filter unit mounting portion)
32 Toride Department

Claims (2)

It has an air conditioning unit provided in a cab that defines a cab, and the air inlet side of the air conditioning unit is connected to an outside air inlet and an inside air filter for sucking air outside the cab through an outside air filter. In an air conditioner for a construction machine connected to an inside air suction port for sucking air in the cab,
An air conditioner for a construction machine, wherein the outside air filter and the inside air filter are integrated as a filter unit, and the filter unit is detachably attached to the air conditioning unit.   The air conditioner for a construction machine according to claim 1, wherein a filter unit mounting portion for detachably mounting the filter unit is provided in the cab.

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