JPH0732903Y2 - Soundproof water-cooled horizontal engine cooling system - Google Patents

Description

[Detailed Description of the Invention] << Industrial field of application >> The present invention relates to a cooling device for a horizontal type soundproof engine used in a soundproof type engine generator, and more specifically, in a soundproof case. A radiator and a radiator fan are arranged on the front side, the engine is installed with the cylinder head facing forward, the engine water jacket and radiator are circulated through a hot water pipe and a cold water pipe, and ventilation is provided at the rear of the soundproof case. The present invention relates to a cooling device for a sound-cooled horizontal water-cooled horizontal engine, in which a muffler of the engine is housed in a soundproof case with an inlet having an exhaust port opened at the front.

<Prior Art> Conventionally, in the above cooling device, the radiator is cooled only by the radiator fan and the ventilation in the soundproof case is performed, and the outside air sucked from the ventilation inlet formed after the soundproof case is guided to the surroundings of the engine. After that, the air was passed through the radiator and discharged outside the machine from the air outlet on the front of the soundproof case.

<Problems to be solved by the invention> According to the above configuration, the interior of the muffler ventilates the soundproof case, which tends to retain hot air, with a single radiator fan and also sufficiently cools the engine by the radiator. In addition, it is necessary to make the radiator and radiator fan large with large heat dissipation capacity, and it is necessary to enlarge the ventilation opening in order to improve the ventilation performance of the soundproof case, so that it is easy to leak engine noise. I was crying.

It is an object of the present invention to provide a cooling device for a sound-cooled horizontal engine which can improve the ventilation performance and the soundproof performance in the soundproof case while reducing the capacity and size of the radiator and the radiator fan.

<< Means for Solving the Problems >> The characteristic structure of the present invention for achieving the above-mentioned object is that in the cooling system for the soundproof water-cooled horizontal engine described above, a partition wall is provided between the radiator and the engine to provide soundproofing. The inside of the case is divided into a radiator room and an engine room, a ventilation fan is provided at the middle height part on one front side inside the engine room, and a muffler room is provided above it, and the engine room is ventilated through the ventilation fan and muffler room. It is connected to the inside, the muffler is accommodated in the muffler chamber, the ventilation hole is opened on the other side of the partition wall, and the radiator cooling air inlet is opened on the peripheral wall of the radiator chamber.

<Operation> According to the above configuration, the outside air sucked into the soundproof case from the ventilation inlet at the rear part of the soundproof case is heated and becomes hot air and reaches the front part of the engine room, a part of which is provided by the ventilation fan. After being guided to the muffler chamber, it was discharged into the atmosphere, and part of the hot air that reached the front of the engine chamber was drawn into the radiator chamber by the radiator fan through the ventilation holes in the partition wall, and was formed on the peripheral wall of the radiator chamber. Along with the cold outside air taken in through the cooling air inlet, it passes through the radiator and is discharged into the atmosphere through the air outlet in the front part of the soundproof case.

Therefore, the ventilation fan performs ventilation cooling of the engine room and the muffler, and the radiator fan plays a part of cooling the radiator and ventilation of the engine room.

<< Embodiment >> FIG. 1 shows a longitudinal side surface of a soundproof engine generator to which a cooling system for a soundproof water-cooled horizontal engine according to the present invention is applied.
The cross-sectional plane is shown in the drawing, and the longitudinal front surface is shown in the main part in the drawing.

This engine generator basically comprises a water-cooled horizontal engine 2 in the front and back of the soundproof case 1 and its cylinder head 2a.
Is installed in a forward-looking posture, a radiator fan 5 driven by a radiator 3 and an electric motor 4 is arranged on the front side of the engine 2, and a generator 6 driven by a belt on the engine output shaft 2b is installed in the engine 2. It is installed and configured on the rear side.

A partition wall 7 is provided between the engine 2 and the radiator 3.
Is installed upright, and the inside of the soundproof case 1 is the engine 2 and the generator 6.
Also, a muffler chamber C partitioned by a partition wall 9 is formed at the front of the engine chamber A and is partitioned by an engine chamber A and a radiator chamber B housed in the fuel tank 8 and the like, and exhaust gas is exhausted here. A muffler 11 that is connected to the cylinder head 2a via a pipe 10 is housed.

Further, a water pump 12 which is belt-transmitted to the engine output shaft 2b is provided on one side of the cylinder head 2a, and an intake port 13 of the water pump 12 is a lower tank of the radiator 3.
It is connected to 3a via a cold water pipe 14. A cooling water outlet 15 communicating with a water jacket (not shown) is provided on the upper surface of the crankcase of the engine 2, and the cooling water outlet 15 and the upper tank 3b of the radiator 3 are connected by a hot water pipe 16. Has been done.

In addition, the input fan 17 of the water pump 12 has a ventilation fan 18
And the upper part of the air guide housing 19 surrounding the fan 18 and the lower part of one side of the muffler chamber C are ventilated.
An exhaust port formed in the upper portion of the muffler chamber C after cooling the muffler 11 by sending the hot air sucked by the ventilation fan 18 from one side of the front part of the engine chamber A to the muffler chamber C and communicating with the muffler chamber C through 21 is configured to be discharged to the outside.

A ventilation inlet 22 is formed in the lower part of the rear side wall of the soundproof case 1 so that cold outside air is sucked in from the rear part of the engine room A, and an engine is provided in the upper part of the partition wall 7 opposite to the muffler room side. A ventilation port 23 that connects the front part of the room A and the radiator chamber B is formed, and a part of the ventilation introduced from the ventilation inlet 22 and reaching the front part of the engine room A flows into the radiator chamber B through the ventilation port 23. Then, the cooling air is introduced from a cooling air inlet 24 formed in a part of the peripheral wall of the radiator chamber B, passes through the radiator 3, and is discharged to the outside through an exhaust port 25 on the front side wall of the soundproof case 1.

In the figure, reference numeral 26 is an intake pipe connected to an air cleaner (not shown), and 27 is a battery.

<< Effect of Device >> As described above, according to the present invention, the following effects can be obtained.

(A) Leakage of engine noise from the ventilation opening can be reduced.

The radiator fan and the ventilation fan in the soundproof case increase the cooling air volume by the flow of the cooling air of two systems to ventilate strongly, so compared to the case where ventilation is performed only with the radiator fan, the ventilation for the soundproof case is provided. Since the opening can be made small, engine noise is less likely to leak from the ventilation opening, and the soundproof performance can be improved.

(B) The radiator and the radiator fan can be downsized.

Since the radiator and radiator fan do not have to bear part of the hot air and muffler exhaust heat in the engine room, the radiator has a smaller heat dissipation capacity, which is advantageous for downsizing the soundproof water-cooled horizontal engine.

(C) The heat dissipation of the muffler can be improved.

Since the muffler is cooled by the cooling air from the ventilation fan in a different path from the cooling air that has passed through the radiator, it is possible to enhance the heat dissipation of the muffler.

(D) The hot air of the cylinder head can be immediately exhausted.

Since the ventilation fan is disposed on the front upper side of the engine, the hot air rising from the cylinder head in the front of the engine can be immediately exhausted, and the heat can be prevented from remaining in the soundproof case.

[Brief description of drawings]

The drawings show an embodiment of a cooling system for a soundproof water-cooled horizontal engine according to the present invention. FIG. 1 is a vertical sectional side view of a soundproof engine generator, FIG. 2 is a cross-sectional plan view thereof, and FIG. FIG. 4 is a vertical sectional front view, and FIG. 4 is an overall schematic perspective view. 1 ... Soundproof case, 2 ... Horizontal water-cooled engine, 2a ... Cylinder head, 3 ... Radiator, 5 ... Radiator fan, 7 ... Partition wall, 11 ... Muffler, 14 ... Cold water pipe, 16
…… Hot water pipe, 18 …… Ventilation fan, 22 …… Ventilation inlet, 23…
… Ventilation port, 24 …… cooling air inlet, 25 …… exhaust port, A …… engine room, B …… radiator room, C …… muffler room.

Claims (1)

[Scope of utility model registration request] 1. A radiator 3 and a radiator fan 5 are arranged in front of a water-cooled horizontal engine 2 in a soundproof case 1.
The engine 2 is installed with the cylinder head 2a facing forward,
The water jacket of the engine 2 and the radiator 3 are circulated through the hot water pipe 16 and the cold water pipe 14 in a circulating manner to provide a soundproof case 1
In a cooling system for a soundproof water-cooled horizontal engine, in which a ventilation inlet 22 is opened in the rear part and an exhaust port 25 is opened in the front part, and the muffler 11 of the engine 2 is housed in the soundproof case 1, the radiator 3 and the engine 2 are connected to each other. By providing a partition wall 7 between them,
The interior of the soundproof case 1 is divided into a radiator room B and an engine room A, a ventilation fan 18 is provided at an intermediate height part on one side of the front part of the engine room A, and a muffler room C is provided on the upper side thereof.
To the atmosphere through the ventilation fan 18 and the muffler chamber C, the muffler 11 is accommodated in the muffler chamber C, the ventilation port 23 is opened on the other side of the partition wall 7, and the radiator cooling air is provided on the peripheral wall of the radiator chamber B. Cooling system for soundproof water-cooled horizontal engine characterized by opening the inlet 24