JPH022661Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field The present invention relates to an air conditioning system for an aerial work vehicle that supplies cold air to a work platform held at the tip of a boom.

(2) Conventional technology Supplying cold air to the work platform of an aerial work vehicle is
As stated in Japanese Utility Model Application Publication No. 59-64898,
It is conventionally known.

(3) Problems that the invention aims to solve However, in the conventional air conditioner for aerial work vehicles, both the cold air generator and the blower were attached to a turntable, so the turntable became larger and the turning angle became difficult. As the diameter increases and the path through which the cold air passes becomes longer, there is a problem of poor cooling efficiency.

(4) Means for solving the problems In order to solve the above problems, the present invention has been developed by placing a unit equipped with a compressor and a condenser on a turntable, and placing a unit equipped with an evaporator and a blower fan on a boom. The unit is installed at the base of the boom, and the two units are connected by a hose through which refrigerant circulates, and the unit installed at the base of the boom and the tip of the boom are connected by a blow pipe installed along the boom, and the tip of the blow pipe is connected. It is connected to the air outlet provided on the workbench.

(5) Effect With the above configuration, the refrigerant liquefied in the unit mounted on the turntable is sent to the unit installed at the base of the boom, and the air cooled by the unit installed at the base of the boom is blown. Cooled air is supplied to the workbench through a pipe, and is blown out from an air outlet provided in the workbench.

(6) Examples Examples of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the aerial work vehicle has a turntable 2 rotatably provided on a vehicle body 1, a base end of a telescopic boom 3 is pivotally supported on the turntable 2, and the telescopic boom 3 is built-in. The telescopic boom 3 is extended and contracted by a telescopic device (not shown), and is raised and lowered by a hoisting cylinder 4. A work platform 5 is held in equilibrium at the tip of the telescopic boom 3, and the most advanced boom of the telescopic boom 3 is made of a material such as FRP. It is made of electrically insulating material, and the base end of the telescopic boom 3 and the workbench 5 are electrically insulated.

A unit 6 is placed on the turntable 2, and a unit 7 is provided on the side of the base of the telescopic boom 3. Both units 6 and 7 are connected by flexible hoses 11 and 12 through which refrigerant circulates. , the side of the telescopic boom 3 is made of electrically insulating material,
A blower pipe 8 is attached that expands and contracts in conjunction with the expansion and contraction of the telescopic boom 3. The base end of the blower pipe 8 is connected to the unit 7, and the tip of the blower pipe 8 is connected to the workbench 5 through a flexible duct 9. It is connected to the provided air outlet 10.

As shown in FIG. 2, the unit 6 includes a compressor 14 driven by an electric or hydraulic motor 13, a condenser 15, and a receiver 17.
The condenser 15 is equipped with a cooling fan 16, the expansion valve 18 of the unit 7 is connected with an evaporator 19, and the evaporator 19 is equipped with a blower fan 20. , the receiver 17 of unit 6 and the expansion valve 18 of unit 7.
The evaporator 19 of the unit 7 and the compressor 14 of the unit 6 are connected by a hose 11, and the base end of the blower pipe 8 is connected to the outlet of the unit 7.

With the above configuration, when supplying cold air to the workbench 5, the motor 13 drives the compressor 14, and the cooling fan 16 and the blower fan 2
0, the refrigerant compressed in the compressor 14 of the unit 6 flows into the condenser 1.
5, the liquefied refrigerant is stored in the receiver 17, and the refrigerant supplied from the receiver 17 to the expansion valve 18 of the unit 7 through the hose 12 is transferred to the expansion valve 18.
The refrigerant flows into the evaporator 19 in the form of a mist, absorbs heat in the evaporator 19, and is evaporated.
Returning to step 4, the air cooled in the evaporator 19 is supplied to the blower pipe 8 by the blower fan 20, and the cold air that reaches the tip of the telescopic boom 3 through the blower pipe 8 passes through the duct 9 to the workbench 5. Air is blown out from the air outlet 10 to cool the workbench 5.

(7) Effects of the invention As described above, according to the invention, since the evaporator and the blower fan are installed at the base of the boom,
Since the unit on the turntable can be small, the distance between the evaporator and the workbench can be shortened, and the evaporator and condenser are located apart, an air conditioning system for an aerial work vehicle with high cooling efficiency can be provided.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of an aerial work vehicle equipped with an air conditioner, and FIG. 2 is a detailed view of the main parts. 2...Turntable, 3...Telescopic boom, 5
...Workbench, 6,7...Unit, 8...Blower pipe, 10...Blower opening, 11,12...Hose,
14... Compressor, 15... Capacitor, 1
6...Cooling fan, 17...Receiver, 18...
Expansion valve, 19... evaporator, 20... ventilation fan.

Claims (1)

[Scope of utility model registration request] A unit equipped with a compressor and a condenser is placed on a turntable, a unit equipped with an evaporator and a blower fan is installed at the base of the boom, and a hose through which refrigerant circulates connects both units. An air conditioning system for an aerial work vehicle, characterized in that the unit and the tip of the boom are connected by a blower pipe provided along the boom, and the tip of the blower pipe is connected to a blower port provided on a workbench.