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construction machinery

A technology for construction machinery and engines, used in earthmoving machines/shovels, heating/cooling equipment, lighting and heating equipment, etc., can solve the problems of poor air conditioning efficiency and temperature rise, and achieve the purpose of suppressing the reduction of cooling effect and reducing cleaning. burden effect

Active Publication Date: 2016-06-01
NIHON KENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the fan is reversely driven in such a structure as described above, since the condenser is located on the leeward side of other cooling objects such as radiators, the temperature of the wind blowing on the condenser will increase, resulting in a decrease in the performance of the air conditioner. Difference

Method used

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Experimental program
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Effect test

Embodiment Construction

[0019] Embodiments of the present invention will be described below using the drawings.

[0020] figure 1 It is a side view of a wheel loader which is an example of a construction machine according to an embodiment of the present invention.

[0021] figure 1 The illustrated wheel loader 100 has a vehicle body 110 and a working machine 120 attached to the front of the vehicle body 110 .

[0022] The vehicle body 110 has a front body 111 and a rear body 112 . The front body 111 and the rear body 112 have front wheels (wheels) 113 and rear wheels (wheels) 114 , respectively, and are flexibly connected to each other by a center pin 115 extending in the vertical direction. Although not shown, a steering cylinder is connected to the front body 111 and the rear body 112 , and the front body 111 is bent to the left and right relative to the rear body 112 as the steering cylinder is telescopically driven. In addition, a cab 116 is mounted on the front portion of the rear body 112 ,...

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PUM

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Abstract

The invention provides a construction machine, which has: a condenser (24) for cooling the refrigerant used for air conditioning; a fan (21) for cooling the condenser (24) through forward cooling wind generated during forward rotation driving; Other cooling objects such as radiators (25) arranged on the leeward side of the forward cooling air in the condenser (24); the refrigerant pressure detector (27) for detecting the pressure of the refrigerant flowing in the condenser (24) ); and a controller (136), the detection pressure (P) of the air-conditioning refrigerant detected by the refrigerant pressure detector (27) when the controller is reversely driven by the fan (21) reaches a preset positive value After returning to the pressure (P1), reverse rotation stop processing for returning the fan (21) to normal rotation drive is performed. Accordingly, it is possible to suppress a decrease in the cooling effect of the air conditioner while reducing the cleaning load of the engine room.

Description

technical field [0001] The invention relates to construction machines such as wheel loaders and hydraulic excavators. Background technique [0002] Construction machines such as wheel loaders and hydraulic excavators often drive hydraulic actuators for work with hydraulic oil from a hydraulic pump driven by an engine. Among such construction machines, there is known a construction machine that reversely drives a fan that blows cooling air to objects to be cooled, such as radiators and hydraulic oil coolers in the engine room, thereby removing the cooling air by countercurrent air. During the forward rotation of the fan, the dust attached to the object to be cooled and the filter for dust removal has the function of reducing the cleaning load of the engine room (see Patent Document 1). [0003] prior art literature [0004] Patent Document 1: Japanese Patent Laid-Open No. 2007-182710 [0005] However, in the above-mentioned construction machinery with a fan, there is a sit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/16
CPCB60H1/00378B60H1/00828B60H1/3205B60H2001/3251E02F9/0866E02F9/0875E02F9/2095E02F9/226E02F9/16E02F9/22F28F27/00
Inventor 菊池圭吾兵藤幸次青木勇田中哲二
Owner NIHON KENKI CO LTD