JPH0221537Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is used for cooling equipment and silencing equipment for mechanical equipment, etc. driven by a prime mover that generates a large amount of heat, such as an internal combustion engine. This invention relates to a cell-type or splitter-type silencer.

Conventionally, the cooling methods for mechanical equipment such as those mentioned above include:
Various methods have been devised, and each has been used depending on the conditions of use. One of these, the air cooling method, or radiator method, is characterized by circulating cooling water without replenishing it.
This method is often adopted under conditions where water suitable for cooling cannot be secured.

On the other hand, as mechanical equipment becomes larger, the room temperature inside the building rises due to the heat generated by the machinery, making it necessary to ventilate the building. Furthermore, in recent years, in order to protect the environment, it has become common practice to install silencers in ventilation equipment to prevent mechanical noise from exiting outside through the ventilation equipment.

However, since the radiator (heat radiator) described above discharges a large amount of air with an increased temperature, it is usually installed outdoors or discharges air outdoors from a building wall, so it is necessary to muffle the sound.

The purpose of this invention was made in view of the above circumstances, and the purpose of this invention is to integrate the ventilation equipment and the radiator to effectively muffle the noise at once, thereby reducing the number of equipment and reducing the size of the muffler. It is to provide the equipment.

In order to achieve the above object, the present invention installs piping along the air flow approximately at the center of each divided cavity of a cell type or splitter type silencer (approximately at the center of both sides in the case of a splitter type). It is characterized in that the cooling medium is passed through the piping.

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

FIG. 1 is a cross-sectional side view of a main part of a first embodiment of the present invention in which a cooling mechanism is incorporated into a cell-type muffler, and FIG. 2 is a view taken along the - line in FIG. 1. In the figure, the exhaust side casing 2 of the ventilation fan 1 has a splitter type muffler 3 in which a sound-absorbing material is pasted on the inner surface of each hollow part divided into vertical cracks, and each cell (cavity part) divided into a lattice shape. Cell-type silencers 4 with sound-absorbing material pasted on the inner surface of the casing 2 are arranged in series, and at the outlet end of the casing 2, a gear door 5 consisting of a large number of parallel rectifying plates 5a is attached. It is being

In this embodiment, piping, that is, cooling pipes 6 are provided along the air flow direction in the central hollow part of each cell 4a to which sound absorbing material is pasted in the cell type silencer 4, and these pipings 6 are connected to both ends. These collected parts are respectively connected to a supply conduit 7 and a discharge conduit 8 of a cooling medium such as water.

In use, when the heat exchange medium guided from the cooled part is flowed into the pipe 6 located in the central cavity of each cell 4a via the supply pipe 7 and the discharge pipe 8,
The heat exchange medium exchanges heat with the air passing through each cell 4a, and at the same time, the sound-absorbing material applied to the inner surface of each cell 4a performs a sound-deadening effect.

According to this embodiment, the piping 6 in each cell 4a
are arranged in the central cavity along the flow of air flowing through the exhaust casing 2, so that they do not cause turbulence in the airflow and there is no possibility that new noise will be generated due to the installation of these pipes 6. In addition, since the piping 6 in each cell 4a is arranged in the central cavity of each cell without contacting the sound-absorbing surface of the inner wall of the cell, there is no risk of reducing the silencing effect due to contact with the sound-absorbing surface. Since the entire surface of the piping itself is in contact with the airflow, the cooling effect is not impaired.

As a result, by adding a cooling pipe, the muffler can function as a muffler that also has a heat exchange function without changing its dimensions.
By installing this muffler, the installation of a separate radiator becomes unnecessary.

FIG. 3 is a cross-sectional side view of a main part of a second embodiment of the present invention in which a cooling mechanism is incorporated into a splitter type muffler, and FIG. 4 is a view taken along the - line in FIG. 3.

In this embodiment, a sound absorbing material is pasted on the inner surface of each vertically divided chamber, that is, the cavity 3a, of the splitter type silencer 3, and each cavity 3a is
A plurality of pipes, that is, cooling pipes 6a, 6a, . The difference from the first embodiment is that they are merged and connected to the cooling water inlet pipe 7a and the cooling water outlet pipe 8a.

In use, by flowing the heat exchange medium led from the cooled section into each pipe 6a via the supply conduit 7a and the discharge conduit 8a, the heat exchange medium can interact with the air passing through each cavity 3a. There is essentially no difference from the first embodiment in that heat exchange is carried out between the hollow parts 3a and silencing effect is carried out by the silencing effect of the silencing material in each cavity 3a, and the same effect is achieved. . However, according to this embodiment, the vertical spacing and the number of pipes 6a arranged in each vertical crack cavity 3a can be freely selected, thereby making it possible to suit the required heat exchange conditions. It has the advantage of being compatible with

FIG. 5 is a sectional view showing one mode of use in which the silencer with an air cooling function of the present invention is attached to pump equipment. In the figure, a diesel engine 24 that drives a pump 22 installed in a water tank 21 via a gear reducer 23 is equipped with a circulation pump P, coolers 25, 26, and the cooling function of the present invention, together with the reducer 23. It is configured to be cooled by a cooling cycle including a silencer 27 and the like.
Each of these devices is installed in a building 28, and the muffler 27 is housed in an exhaust casing 30 of a ventilation fan 29 provided on the ceiling of the building 28. On the other hand, on the side wall of the building 28, an intake silencing chamber 33 is provided with gears 31 and 32 at its entrance and exit. In addition, in the figure, 34 indicates a discharge water tank.

In operation, the pump 22 is connected to the diesel engine 24.
When driven by the engine, the water in the water tank 21 is sucked in and discharged into the discharge water tank 34. During operation, the heat generated by the engine 24 and the reduction gear 23 is absorbed by the coolers 25 and 26 connected to these heat generating parts. Then, heat is exchanged with the cooling medium circulated by the pump P, and the warmed medium is cooled by the ventilation airflow passing through a silencer 27 with a cooling function by the ventilation fan 29, and the silencer 27 cools the warmed medium with the outside air. This exhaust flow is simultaneously muffled.

In both the first and second embodiments, by using the splitter type muffler 3 and the cell type muffler 4 in series, the frequency characteristics based on the structure of each muffler can be complemented with each other. As a result, the range of frequencies that are muted can be expanded. However, depending on the conditions of use,
It goes without saying that these two types of silencers cannot always be installed side by side, but on the other hand, it is also possible to increase the cooling capacity by using both types of silencers, each with a cooling function, side by side. It is.

As explained above, according to the present invention, each sectioned cavity of a conventional cell type or splitter type muffler is provided with a cooling function. A cooling function is obtained, and since there is no need to install a radiator as in the conventional case, there is no need for accompanying equipment, such as a space for installing a radiator, a cooling fan, a silencer dedicated to the radiator, etc.

In addition, by placing piping for passing the heat exchange medium inside almost the center of each divided cavity along the flow of air, the airflow caused by the piping inside each cell is not disturbed. Not only is there no risk of generating new noise due to the installation of these pipes, but there is also no risk of reducing the silencing effect due to contact with the sound-absorbing surface of the cell inner wall, and the entire surface of the pipes themselves is in contact with the airflow. Therefore, the cooling effect is not impaired.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the internal structure of the first embodiment of the silencer with air cooling function according to the present invention;
The figure is a view taken along the - line in Fig. 1, Fig. 3 is a side view showing the internal structure of the second embodiment, Fig. 4 is a view taken along the - line in Fig. 3, and Fig. 5 is a main view. FIG. 2 is a side sectional view showing one mode of use of the device. 3... Splitter type silencer, 4... Cell type silencer, 6, 6a... Heat exchange piping.

Claims (1)

[Scope of utility model registration request] Air cooling, characterized in that piping is provided approximately in the center of each divided cavity of a cell type or splitter type muffler along the flow of air, and a heat exchange medium is passed through the piping. A silencer with functions.