JPH0471588B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an engine cooling method and apparatus for a chemical spraying vehicle such as a speed sprayer,
More specifically, the present invention relates to a method and device for cooling the engine of a chemical spray vehicle that can improve the cooling effect of the engine.

[Prior art] Figure 3 is described in Japanese Utility Model Publication No. 39-34009.
This figure shows an example of a conventional chemical sprayer.In this figure, from the front, on the machine base a, there are a jet pipe group b, a main blower d with a wire mesh replenishment gap c at the rear, and a front-back ventilation passage e in the center. A liquid storage tank f is penetrated through the tank f, an engine box h containing an engine g is placed inside, and the rotating shaft i of the main blower d is connected to the engine g through the air passage e. A number of ventilation gaps j are bored in the radiator, and a radiator k for cooling the engine g is provided on the rear side, l is a cooling water pipe that connects the radiator k and the engine g, and m is a water supply pipe driven by the engine g. A liquid pump, n, indicates a liquid feeding pipe that connects this liquid feeding pump m and the injection pipe group b, and the chemical sprayer having the above configuration operates its engine g to operate the main blower d. By rotating the radiator k, the outside air sucked into the engine box h from the front of the radiator k and the ventilation gap j is sent through the ventilation path e to the part of the injection pipe group b, and the chemical liquid injected from each injection pipe is directed upward and sideward. The outside air sucked into the engine box h cools the engine g while
It is sent to the main blower d.

A chemical sprayer with an axial blower has a configuration in which air sucked in from an axial direction is discharged in a radial direction through a jet head, and a nozzle is arranged in the jet head to convey a large amount of mist.

In a typical farm field, this type of sprayer travels in a meandering pattern between trees, so the suspended mist is sucked in and released again. By the way, sprayed chemicals are generally highly corrosive, and if they adhere to the engine, it will affect the life of the engine and the durability of the entire sprayer. Pay attention to how to protect the Further, the shaft grain blower is relatively noisy and is required to efficiently blow a predetermined amount of air.

Taking the above points into consideration, the structure in which the engine is located in the suction passage as shown in FIG. This is a loss in efficiently blowing air, and a large amount of air needs to be blown, resulting in increased noise, which is undesirable.

[Problem to be solved by the invention]

The present invention has been made with the intention of overcoming the unsuitable and disadvantageous conditions in the conventional example.

[Means to solve the problem]

Here, the present invention provides a chemical spraying vehicle in which an engine disposed in an engine room and a blower for sending air to a nozzle head are mounted on a movable frame. Using the negative pressure generated on the suction side of the blower 26 located on the rear end side of the direction, the blower moves the air inside the engine room 30, which is covered with the engine room cover 22 from above and on the sides. We propose a method for cooling the engine of a chemical dispersion vehicle, which is characterized by causing suction to the suction side, and in order to implement the method, the suction side opening 44 is connected to the engine room 30.
The discharge side opening 46 is opened inside the blower 2.
The present invention proposes an engine cooling system for a chemical spraying vehicle, characterized in that a duct 42 opened on the suction side of No. 6 is disposed below the engine room 30.

[Effect]

As the blower rotates, negative pressure is generated on the suction side of the blower, and this negative pressure acts on the end of the duct on the blower side. As a result, air in the engine room is sucked into the duct and discharged to the suction side of the blower via the duct. The air exiting the end of the duct on the blower side, along with other air drawn in by the blower, is sent to the jet head to transport the drug.

〔Example〕

FIG. 2 is a side view of the speed sprayer 10 as a chemical spraying vehicle. speed sprayer 10
The speed sprayer 10 has a frame 16 that is supported by front wheels 12 and rear wheels 14 so as to be self-propelled.
8. Chemical tank 20, engine room cover 2
2, a jet head 24, and a blower 26 are arranged.

Next, an embodiment of the present invention shown in FIG. 1 will be described.

The oil pan 40 is fixed to the lower part of the engine 28 and contains engine oil therein. A duct 42 extending in the front-rear direction of the speed sprayer 10 below the jet head 24 and the blower 26
The suction side opening 44 opens near the oil pan 40, and the discharge side opening 46 opens at the lower part of the rotor blade 38 on the suction side. In the illustrated embodiment, the discharge side opening 46 opens parallel to the flow of intake air from the rear of the speed sprayer 10 to the rotor blades 38, so that the intake air from the rear of the speed sprayer 10 to the blower 26 is opened. Due to the flow, a large negative pressure is exerted on the same principle as a jet pump. In addition, the discharge side opening 46 may be made to face the blower 26, and in that case, the air suction force by the blower 26 acts directly on the discharge side opening 46. In the figure, 32 is a radiator, and 34 is a cooling fan.

While the speed sprayer 10 is spraying the chemical, negative pressure is generated on the suction side of the blower 26 as the blower 26 rotates, and this negative pressure acts on the discharge side opening 46 of the duct 42 . Thereby, the air in the engine room 30 is sucked into the duct 42 and discharged to the suction side of the blower 26 via the duct 42. The air coming out of the end of the duct 42 on the side of the blower 26 is sent to the nozzle head 24 along with other air sucked in by the blower 26 from behind the speed sprayer 10, and the agent sprayed from the nozzle 36 is distributed around the speed sprayer 10. transport.

〔Effect of the invention〕

As described above, according to the present invention, the engine room is communicated with the suction side of the blower through the duct, and the high temperature air in the engine room is sucked by the negative pressure on the suction side of the blower that is generated as the blower operates. The air is then discharged through the duct to the suction side of the blower. As a result, high-temperature air stays in the engine room and the temperature inside the engine room is controlled, and the air that stays in the engine room is prevented from going around to the front of the radiator, improving engine cooling efficiency. can be increased.

In this invention, the high-temperature air in the engine room is discharged to the suction side of the blower and used for transporting the medicine, so it is possible to raise the temperature of the air for transporting the medicine when spraying the medicine when the temperature is low. It is possible to suppress the negative effects caused by low-temperature air hitting crops. Furthermore, by blowing high temperature air around the engine to the ground using a blower, it can be used to blow high temperature air to prevent frost damage.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is a schematic overall side view of a speed sprayer as a chemical spraying vehicle, and FIG. 3 is an explanatory diagram of an example of a conventional technique. 10...Speed sprayer (chemical spraying vehicle),
24...Full head, 26...Blower, 28...Engine, 30...Engine room, 42...Duct,
44... Suction side opening, 46... Discharge side opening.

Claims (1)

[Claims] 1. An engine disposed in an engine room;
In a chemical spraying vehicle in which the blower that sends air to the nozzle head is mounted on a movable frame, the negative energy generated on the suction side of the blower 26 located at the rear end side in the direction of movement of the chemical spraying vehicle is An engine for a chemical spray vehicle characterized in that air in the engine room 30, which is covered with an engine room cover 22 on the upper and side sides, is sucked into the suction side of the blower 26 by using pressure. Cooling method. 2. The engine installed in the engine room,
In a chemical spraying vehicle in which a blower that sends air to the jet head is mounted on a movable frame, the suction side opening 44 is opened into the engine room 30,
A duct 42 with a discharge side opening 46 opened on the suction side of the blower 26 is connected to the engine room 3.
An engine cooling device for a chemical spraying vehicle, characterized in that the engine cooling device is arranged below zero.