JPH06106963A - Structure for set-up of air-conditioning inside unit on working vehicle - Google Patents

Abstract

PURPOSE:To eliminate the necessity of the provision of a space for set-up of an air-conditioning inside unit in a cabin so as to enhance the accommodation quality by setting up the inside unit on the upper end part of the rear surface of a cabin so that it is projected from the latter. CONSTITUTION:In an outside unit 16 in which an expansion valve 11, an evaporator 12 and the like are integrated, an openable blow-out louver 18 and a removable air-filter 19 are assembled to the front face part of an inside unit casing 17 in which the expansion valve 11 and the evaporator 12 are incorporated. The inside unit 16 is set up on the upper end part of the rear surface of a cabin 16 so as to be projected from the latter. That is, the inside unit 16 is set up with the use of a dead space which does not interfere with the opening and closing area of an engine hood 20 with which an engine 5 is covered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement structure of an air conditioning indoor unit in a work vehicle such as a hydraulic shovel.

[0002]

BACKGROUND OF THE INVENTION Generally,
Some working vehicles, such as hydraulic shovels, are equipped with a cabin with the control section covered with a cabin.
There are optional equipment or standard equipment that can be installed with an air conditioner. However, in the past, since the indoor unit that constitutes the air conditioner was arranged inside the cabin, the indoor unit may press the living space of the operator and cause deterioration of livability. When installing the unit, it was necessary to remove the covers of the cabin and the inside of the cabin, and the assembling property was also a problem. Further, the indoor unit is connected to a pipe such as a high-pressure hose for receiving the supply of the refrigerant from the outdoor unit, a low-pressure hose for returning the refrigerant to the outdoor unit, and a drain hose for draining the dew condensation. In the past, since the pipe was exposed to the outside of the cabin as it is, there is a possibility that the appearance may be impaired, and it is necessary to cover the pipe with a hose cover.

[0003]

DISCLOSURE OF THE INVENTION The present invention was devised with the object of providing an air-conditioning indoor unit arranging structure in a work vehicle capable of eliminating these drawbacks in view of the above circumstances. In a traveling vehicle for work in which an air-conditioning indoor unit is arranged in a cabin covering the control section, the air-conditioning indoor unit is arranged in a protruding shape at the upper end of the rear surface of the cabin. It is what Further, in a working vehicle in which an air conditioning indoor unit is disposed in a cabin covering the control section, the air conditioning indoor unit is disposed in a projecting manner at the upper end of the rear surface of the cabin and projects rearward from the cabin. A hollow support stay for supporting the air conditioning indoor unit is provided, and a pipe connected to the air conditioning indoor unit is inserted into the hollow portion of the support stay. With this configuration, the present invention eliminates the inconvenience that the air conditioning indoor unit squeezes the living space to significantly improve the habitability, and also improves the assembling property of the air conditioning indoor unit. It is the one.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a hydraulic shovel, and the hydraulic shovel 1 is a crawler type traveling section 2 and the traveling section 2
And a working unit 4 connected to the front end of the swivel unit 3 and the like, and each unit is driven by an engine 5 mounted on the rear of the swivel unit 3. Although it is hydraulically operated, all of these basic configurations are conventional.

By the way, in the swivel unit 3, there are a normal type in which a steering unit 3a provided at a position offset to the left side in front of the engine 5 is opened, and a cabin type in which the entire steering unit 3a is covered with a cabin 6. The specification can be selected, and in the normal specification, entry and exit from the step portions 3b and 3c formed at the left and right ends of the turning portion 3 is allowed, but in the cabin specification, the left side surface of the cabin 6 is Since only the opening / closing door 6a is provided, entry / exit from the right step portion 3c is restricted.

Further, in the above-mentioned cabin specification, an air conditioner can be equipped with an option, and the air conditioner equipped with the option is a compressor 7 for pumping the refrigerant in a gas state, and a gas state pumped from the compressor 7. 9 for liquefying the above refrigerant by forced cooling of the fan 8, a receiver 10 for temporarily storing the liquefied refrigerant by the condenser 9, and an expansion for expanding the liquid refrigerant supplied from the receiver 10 into a low temperature and low pressure mist state. The compressor 7 includes a valve 11, an evaporator 12 that removes heat from the air sent by the fan based on the vaporization of the refrigerant supplied from the expansion valve 11, a hydraulic motor 13 that drives the compressor 7, and the like. The electromagnetic clutch 14 for connecting and disconnecting the drive is installed in the Pressure detection switch 15 for detecting the pressure in is provided.

Reference numeral 16 denotes an indoor unit in which the expansion valve 11, the evaporator 12 and the like are integrally unitized. The indoor unit 16 is provided on the front surface of an indoor unit case 17 in which the expansion valve 11 and the evaporator 12 are installed. It is constructed by assembling an openable / closable blowing louver 18 and a detachable air filter 19, but this is not the inside of the cabin 6 as in the conventional case, but the cabin 6
The window frame 6b formed on the rear surface is disposed so as to project rearward at the upper end thereof. That is, the indoor unit 16 is arranged using a dead space that does not interfere with the opening / closing area of the engine hood 20 that covers the engine 5.
The indoor unit 16 arranged in this way is fixed to the window frame 6b with the left and right side plates of the indoor unit case 17 and the front ends of the top plate with screws, so that the blowing louver 1
8 and the air filter 19 are fixedly attached to the outside of the cabin 6 so as to face the inside of the cabin 6, but a flange piece 17a protruding downward is integrally formed at the front end portion of the bottom plate of the indoor unit case 17. Therefore, the upper edge of the window glass 22 can be supported via the H-shaped rubber 21.

Reference numeral 23 denotes a pair of left and right supporting stays formed in a hollow shape. The lower end side of the supporting stays 23 is fixed to the lower end portion of the rear surface of the cabin 6, while the upper end side is rearward and upward. The bottom surface of the tip of the indoor unit 16 is supported in a slanting shape to support the bottom surface of the indoor unit 16 in a cane-like shape, but the high-pressure hose 24 for supplying the refrigerant to the indoor unit 16 and the refrigerant to the compressor 7 are provided in the hollow portion of the right support stay 23. A low pressure hose 25 for returning and a drain hose 26 for draining the dew condensation of the evaporator 12 are piped in an insertion shape.
Furthermore, in the present embodiment, the drain hose 2
6 is bifurcated, and the two branched drain hoses 26 are respectively inserted into the left and right support stays 23. Therefore, even if the machine body is tilted to the left or right, the dew condensation is not delayed. , Either the left or right drain hose 26
Can be reliably discharged from the.

On the other hand, 27 is an outdoor unit of the air conditioner, and the outdoor unit 27 is an outdoor unit case 28.
Inside, the above-mentioned compressor 7, capacitor 9, receiver 1
No. 0, a hydraulic motor 13 and the like are built in, but this one is not on the internal space of the engine room or the like as in the past, but on the right step part 3c formed at the right front end of the turning part 3. It is located in the outer space of.
That is, the outdoor unit 28 is arranged in the dead space on the right step portion 3c, which cannot be used in the cabin specification equipped with the air conditioner.

By the way, in the outdoor unit 27, the compressor 7 and the hydraulic motor 13 are arranged in parallel in the left and right below the inside of the outdoor unit case 28, while the condenser 9 is arranged above them. Since the parts generate vibrations, antivibration measures are taken in the arrangement in this embodiment. That is, the compressor 7 and the hydraulic motor 13 which are interlockingly connected via the belt 29 are assembled on the single base plate 31 supported on the bottom plate of the outdoor unit case 28 via the vibration proof rubber 30, while the fan 7 is mounted on the bottom plate of the outdoor unit case 28. The condenser 7, which is integrated with the condenser 8, has four corners mounted on the inner surface of the front plate of the outdoor unit case 28 via the anti-vibration rubber 32.

Further, 33 is a hydraulic circuit incorporated in the hydraulic shovel 1, and the hydraulic circuit 33 includes a pump unit 34 having a plurality of hydraulic pumps driven by the power of the engine 5, an arm cylinder 35, and a boom cylinder. 36,
A main control valve 43 for operating and controlling frequently used hydraulic actuators such as a bucket cylinder 37, a swing cylinder 38, a swing motor 39, left and right traveling motors 41 and 42, and a blade cylinder 44 which is rarely used.
And a sub-control valve 45 for controlling the operation of the traveling motors 41 and 42 and a shift pilot operation of the traveling motors 41 and 42 are hydraulically connected to an oil tank 46 in which hydraulic oil is stored. Includes a hydraulic motor 13 for driving the compressor 7.
That is, the return oil path 47 of the sub-control valve 45 that is used less frequently is branched, the hydraulic motor 13 is connected to the branch oil path 48, and the return oil path 47 is intermittently connected to a position below the branch point of the return oil path 47. An electromagnetic valve 49 is installed. Therefore, in the ON state of the electromagnetic valve 49, the return oil is supplied to the branch oil passage 48 based on the interruption of the return oil path 47 to drive the hydraulic motor 13, while in the OFF state of the electromagnetic valve 49, the hydraulic motor 13 is driven. Is about to stop.

The solenoid portion of the electromagnetic valve 49 is turned on and off based on a drive command from the temperature controller 50 arranged in the cabin 6, and based on the pressure detection of the pressure detection switch 15. In order to perform the OFF operation, the pressure sensor switch 15 is connected to the temperature controller 50, and the electromagnetic valve 49 is turned ON-OF.
Although it is connected to the electromagnetic clutch 14 to synchronize the drive of the compressor 7 with F, a delay timer relay 51 is provided between the electromagnetic valve 49 and the electromagnetic clutch 14. That is, without turning on the electromagnetic clutch 14 at the same time as turning on the electromagnetic valve 49, the turning on of the electromagnetic clutch 14 is delayed until the hydraulic motor 13 obtains the inertial force of the flywheel to stabilize the rotation. .

In the embodiment of the present invention constructed as described above, the indoor unit 16 of the air conditioner is not located inside the cabin 6 as in the conventional case, but is rearward at the upper end of the window frame 6b formed on the rear surface of the cabin 6. It is arranged in a protruding shape. Therefore, it is unnecessary to particularly secure the installation space of the indoor unit 16 inside the cabin 6 where space is restricted, and the inconvenience that the indoor unit 16 presses the living space of the operator is eliminated. It is possible to measure significant improvement in sex.

Moreover, since the upper end portion of the rear surface of the cabin 6 in which the indoor unit 16 is disposed is a dead space that does not interfere with the opening / closing area of the engine hood 20 that covers the engine 5, it is possible to effectively use the dead space. In addition, there is no inconvenience of pressing other members installed in the external space.

Furthermore, since the indoor unit 16 can be mounted outside the cabin 6, the troublesome work of removing the covers of the main body of the cabin 6 and the interior of the cabin 6 as in the conventional case is not required, and the mountability is improved. Can also be measured.

Further, since the high pressure hose 24, the low pressure hose 25 and the drain hose 26 connected to the indoor unit 16 are inserted into the hollow portion of the support stay 23 for supporting the indoor unit 16, the piping is external. Not only can all the inconveniences of being exposed and impairing the appearance be eliminated, but the hose cover for covering the piping can be eliminated.

[0017]

In summary, since the present invention is constructed as described above, the air conditioning indoor unit is arranged in the cabin covering the control section, but the air conditioning indoor unit is the upper end of the rear surface of the cabin. Since it is arranged in a protruding shape on the part, there is no need to bother to secure a space for disposing the indoor unit inside the cabin as in the conventional case.As a result, the inconvenience that the indoor unit presses the operator's living space is eliminated. The habitability can be significantly improved.

In addition, since the indoor unit is assembled from the outside of the cabin, the indoor unit can be attached very easily without removing the covers of the main body of the cabin and the inside of the cabin as in the conventional case.

When a hollow support stay is provided which projects rearward from the cabin and supports the indoor unit for air conditioning, and a pipe connected to the indoor unit is inserted into the hollow portion of the support stay. It is not possible to prevent the pipe from being exposed and maintain a good appearance, and it is possible to eliminate the trouble of covering the pipe with the hose cover.

[Brief description of drawings]

FIG. 1 is a plan view of a hydraulic shovel.

FIG. 2 is a side view of the same.

FIG. 3 is a plan sectional view of an indoor unit.

FIG. 4 is a side sectional view of the same.

FIG. 5 is a rear sectional view of the same.

FIG. 6 is a front view of the same.

FIG. 7 is a cross-sectional view of a support stay.

FIG. 8 is an internal front view of the outdoor unit.

FIG. 9 is an internal side view of the same.

FIG. 10 is a hydraulic circuit diagram of a hydraulic shovel.

[Explanation of symbols]

 1 hydraulic shovel 2 traveling part 3 turning part 3a control part 3b left side step part 3c right side step part 4 working part 5 engine 6 cabin 6 compressor 13 hydraulic motor 16 hydraulic unit 16 indoor unit 23 support stay 24 high pressure hose 25 low pressure hose 26 drain hose 27 outdoor unit 33 Hydraulic circuit 43 Main control valve 45 Sub control valve 49 Electromagnetic valve

Claims (2)

[Claims] 1. A working vehicle comprising an air conditioning indoor unit provided in a cabin covering a control section, wherein the air conditioning indoor unit is provided in a projecting manner at an upper end of a rear surface of the cabin. Arrangement structure of air-conditioning indoor unit in working vehicle. 2. A working vehicle in which an air conditioning indoor unit is provided in a cabin covering a control section, the air conditioning indoor unit is provided in a protruding manner at the upper end of the rear surface of the cabin, and the cabin is removed from the cabin. A working traveling vehicle characterized in that a hollow support stay protruding rearward is provided to support the air conditioning indoor unit, and a pipe connected to the air conditioning indoor unit is inserted into the hollow portion of the support stay. Arrangement structure of indoor unit for air conditioning.