JP2023129998A - Vapor filter cover and vapor using device having vapor filter cover - Google Patents

Abstract

To provide: a vapor filter cover capable of suppressing passing sound made when vapor passes through a vapor filter; and a vapor using device having the vapor filter cover.SOLUTION: When vapor jetted from a distal end portion of an introduction pipe 14 passes through a mesh filter 4, a passing sound may be generated. To suppress the passing sound, a silencing cover 2 is attached to the mesh filter 4. A large number of silencing holes 25 are formed in a cylindrical body 20 of the silencing cover 2, and each silencing hole 25 is provided with an inclined surface whose inner diameter gradually reduces from an inner peripheral surface to an outer peripheral surface of the cylindrical body 20. This results in that the passing sound is reflected and diffused by the inclined surface, causing friction to be generated between the inclined surface and an inner surface of the silencing holes, which friction converts sound energy of the passing sound into thermal energy, thereby weakening vibration of the passing sound. In this way, the passing sound is reduced, and the passing sound made when the vapor passes through the mesh filter 4 can be suppressed.SELECTED DRAWING: Figure 2

Description

A steam filter cover and a steam usage device having a steam filter cover according to the present application relate to a technique for configuring a steam filter cover that is attached to a steam filter that filters steam.

Steam is sometimes used as a heat source for various devices, but the steam generally contains foreign matter such as fine dust. For this reason, a filter is often provided in the vapor transport path to allow the vapor to pass through, and the vapor is filtered by this filter to trap foreign substances.

As a device equipped with such a vapor filter, there is a gas-liquid separator disclosed in Patent Document 1 mentioned below. This gas-liquid separator is a device that separates liquid such as moisture from gas such as steam. The gas flowing in from the inlet 6 swirls along the swirling vanes 12, and the centrifugal force at that time causes the liquid to be blown out and separated. The gas from which the liquid has been removed flows out through outlet 5.

Gas thus passes through this gas-liquid separator, and an upstream filter 24 and a filter 22 are provided in the gas flow path within the gas-liquid separator. The gas is filtered by passing through the upstream filter 24 and the filter 22, and foreign substances contained in the gas are captured.

Japanese Patent Application Publication No. 2010-162480

However, in the technique disclosed in Patent Document 1 mentioned above, when gas passes through the filter, passing sound may be generated. In particular, when a mesh-like metal filter is used, passing sound is often generated. Further, for example, in a cylindrical filter, when gas passes through from the inside to the outside, a louder passing sound is generated outside.

Such passing sound may cause a noise problem depending on the conditions. In addition, various equipment installed in the steam transfer path often generates abnormal noise due to failure or deterioration of parts, so if passing sound is generated when passing through a filter, it is normal for the equipment. There is a risk that it may be mistakenly recognized that a failure has occurred even though the device is operating normally.

Therefore, it is an object of the present application to provide a steam filter cover and a steam using device having a steam filter cover that can suppress the passing sound when steam passes through a steam filter. shall be.

The steam filter cover according to the present application is
A steam filter cover that is attached to a mesh metal steam filter that filters steam,
a cover body having an inner surface facing the vapor filter and an outer surface that is the back side of the inner surface;
A through hole that communicates the inner surface and the outer surface of the cover body and through which steam passes from the inner surface to the outer surface, the hole gradually increasing in size from the inner surface to the outer surface. A through hole in which a sound-deadening slope is formed on the inner surface of the through hole,
It is characterized by having the following.

The steam using device having the steam filter cover according to the present application is
an inflow channel through which steam flows;
a mesh metal vapor filter that filters the vapor flowing in through the inlet channel;
A steam filter cover attached to the steam filter, the steam filter cover comprising:
a cover body having an inner surface facing the vapor filter and an outer surface that is the back side of the inner surface;
A through hole that communicates the inner surface and the outer surface of the cover main body and through which steam passes from the inner surface to the outer surface, the hole gradually increasing in size from the inner surface to the outer surface. a through hole in which a sound-deadening slope is formed on the inner surface of the through hole;
It is characterized by

In the steam filter cover and the steam using device having the steam filter cover according to the present application, the steam filter cover has a through hole that communicates the inner surface and the outer surface of the cover body and through which steam passes from the inner surface to the outer surface. is formed. A noise-reducing slope is formed on the inner surface of the through hole, and the size thereof gradually decreases from the inner surface toward the outer surface.

Therefore, when steam passing through a steam filter generates passing sound, this passing sound enters the through hole together with the steam and is diffused on the sound-deadening slope, and the vibration energy of the passing sound is converted into thermal energy. Vibration is weakened. Therefore, the sound generated when steam passes through the steam filter can be suppressed.

1 is a schematic diagram showing the overall configuration of a heating device 1 provided with a muffling cover 2, which is a first embodiment of a steam filter cover and a steam usage device having the steam filter cover according to the present application. 2 is an enlarged partial cross-sectional view of the vicinity of the sound deadening cover 2 shown in FIG. 1. FIG. 3 is an enlarged sectional view showing a sound deadening hole 25 formed in the sound deadening cover 2 shown in FIG. 2. FIG. FIG. 2 is an enlarged partial sectional view of the vicinity of a sound deadening cover 202 in a second embodiment of a steam filter cover and a steam usage device having the steam filter cover according to the present application.

[Explanation of terms in the embodiment]
The main terms shown in the embodiments correspond to the following elements of the steam filter cover and the steam usage device having the steam filter cover according to the present application, respectively.

Heating device 1...Steam usage device Sound deadening cover 2, 202...Steam filter cover Mesh filter 4...Steam filter Inlet pipe 14...Inflow channel Cylindrical body 20, 220...Cover body Inner peripheral surface 20a ...Inner surface Outer surface 20b...Outer surface Silencing hole 25, 225...Through hole Silencing hole inner surface 25a...Through hole inner surface Inclined surface 25b...Sound damping inclined surface Outer surface of mesh filter 4 and cylinder Gap between the inner peripheral surfaces of the main bodies 20 and 220...Diffusion space Rubber, urethane sponge, glass wool, etc....Elastic material

[First embodiment]
A first embodiment of a steam filter cover and a steam using device having a steam filter cover according to the present application will be described using the configuration of a heating device 1 as an example. The heating device 1 is a device that heats an object to be heated 50, such as food, housed in the device main body 10 using steam (see FIG. 1).

A space within the device main body 10 of the heating device 1 is configured as a heating chamber 12. A cylindrical introduction pipe 14 is attached to the upper part of the apparatus main body 10 toward the heating chamber 12, and steam generated in a steam generation device such as a boiler is transferred through this introduction pipe 14, and the arrow 91 It is introduced into the heating chamber 12 along the direction. As shown in FIG. 2, the tip of the introduction pipe 14 is sealed with a bolt 15, but a blowout hole is provided in the cylindrical surface of the tip (not shown), and steam flows from this blowout into the heating chamber. Injected on 12.

As shown in FIG. 2, a cylindrical mesh filter 4 is attached to the tip of the introduction pipe 14 to cover the jet port, and the steam passes through the mesh filter 4 and is jetted out. The center of the mesh filter 4 is arranged to coincide with the center line L1 (FIG. 2) of the introduction tube 14. Note that in this embodiment, the mesh filter 4 is made of a metal material and includes a net-like mesh portion throughout.

The steam transferred through the introduction pipe 14 may contain foreign matter such as dust, and the steam is filtered by passing through the mesh filter 4, and the foreign matter is captured by the mesh portion of the mesh filter 4. Note that the mesh filter 4 is removable from the tip of the introduction tube 14, and during maintenance work, the mesh filter 4 is removed from the introduction tube 14, and foreign matter adhering to the mesh filter 4 is removed during cleaning work. be done.

Here, when the steam passes through the mesh filter 4, passing sound may be generated. This is complicatedly related to factors such as the material and shape of the mesh filter 4, but when steam passes through the mesh filter 4 with great force, turbulent airflow occurs, which is mainly responsible for the generation of passing sound.

Such passing sound may cause noise problems. In addition, if a malfunction or deterioration of parts occurs in the heating device 1, abnormal noise is often generated due to this. There is a risk that the device 1 may be mistakenly recognized as having a malfunction even though it is operating normally.

Therefore, in order to suppress such passing sound, a cylindrical sound deadening cover 2 is provided to cover the mesh filter 4 in this embodiment. This muffling cover 2 is held close to the mesh filter 4, and a small gap is formed between the outer peripheral surface of the mesh filter 4 and the inner peripheral surface of the muffled cover 2. The center of the sound deadening cover 2 is arranged so as to coincide with the center line L1 (FIG. 2) of the introduction pipe 14.

In this embodiment, the sound deadening cover 2 is constructed using rubber as an elastic member. The sound deadening cover 2 is removably held at the tip of the introduction tube 14 by fitting the concave and convex portions or by fixing means (not shown) such as a fixture. Note that in FIG. 2, only the sound deadening cover 2 is shown as a cross-sectional view, and the other parts are shown as a side view.

The sound deadening cover 2 includes a cylindrical body 20, and a large number of sound deadening holes 25 are formed throughout the cylindrical body 20, as shown in FIG. Each of the muffling holes 25 has a circular shape, and as shown in FIG. 3, penetrates the inner peripheral surface 20a and outer peripheral surface 20b of the cylindrical body 20 so as to communicate with each other. The inner circumferential surface 20a of the cylindrical body 20 is a surface that closely faces the outer circumferential surface of the mesh filter 4, and the outer circumferential surface 20b is the back surface of the inner circumferential surface 20a. The through center line L2 (FIG. 3) of each muffling hole 25 is formed to be perpendicular to the center line L1 (FIG. 2) of the introduction pipe 14.

The muffling hole inner surface 25a of each muffling hole 25 is composed of a continuously formed cylindrical surface 25c and an inclined surface 25b. The cylindrical surface 25c has an inner diameter that is constant along the penetration center line L2, whereas the inclined surface 25b has an inner diameter that gradually decreases from the inner peripheral surface 20a to the outer peripheral surface 20b of the cylindrical body 20. It is sloping. In this embodiment, the inclination angle k of the inclined surface 25b with respect to the cylindrical surface 25c is less than 45 degrees, specifically approximately 40 degrees.

Since the sound deadening hole inner surface 25a of each sound deadening hole 25 is provided with an inclined surface 25b, when the passing sound generated when steam passes through the mesh filter 4 enters the sound deadening hole 25, the passing sound is reflected on the inclined surface 25b. and diffuses, causing friction with the inner surface 25a of the sound deadening hole. This friction converts the sound energy of the passing sound into thermal energy and weakens the vibration of the passing sound. Therefore, the passing sound becomes small, and the passing sound when steam passes through the mesh filter 4 can be suppressed.

In addition, in this embodiment, since the sound deadening cover 2 is made of rubber, the vibration of the rubber material also converts the sound energy of the sound passing through the mesh filter 4 into vibrational energy or thermal energy. is weakened. Therefore, the passing sound becomes smaller, and the passing sound when the steam passes through the mesh filter 4 can be further suppressed.

Furthermore, in this embodiment, since a slight gap is formed between the outer circumferential surface of the mesh filter 4 and the inner circumferential surface of the sound deadening cover 2, the sound passing through the mesh filter 4 is diffusely reflected within this gap. and spread. The friction during this diffusion converts the sound energy of the passing sound into thermal energy, weakening the vibration of the passing sound. Therefore, the passing sound becomes smaller, and the passing sound when the steam passes through the mesh filter 4 can be further suppressed.

[Second embodiment]
A second embodiment of a steam filter cover and a steam usage device having the steam filter cover according to the present application will be described based on FIG. 4. The sound deadening cover 202 according to this embodiment is also attached to cover the mesh filter 4 provided at the tip of the introduction pipe 14, similarly to the sound deadening cover 2 in the first embodiment described above. The operation of the heating device 1, the structure and function of the inlet pipe 14 and the mesh filter 4 are the same as in the first embodiment described above, so their explanation will be omitted. Note that in FIG. 4, only the sound deadening cover 202 is shown as a cross-sectional view, and the other parts are shown as a side view.

The sound deadening cover 202 according to this embodiment also has a cylindrical shape and is made of a rubber material, and the inner diameter of the upper end (or both ends) of the sound deadening cover 202 is the same as the inner diameter of the sound deadening cover 2 in the first embodiment. The sound deadening cover 202 according to the present embodiment is designed to have a material and thickness that expands under the pressure of steam flowing into the introduction pipe 14. In other words, the sound deadening cover 202 according to the present embodiment is configured to have a bulge that curves toward the center as shown in FIG. 4 during use. Due to this bulge, the gap length L20 in the inner diameter direction between the inner circumferential surface of the sound deadening cover 202 and the outer circumferential surface of the mesh filter 4 is ensured to be wider.

In the cylindrical body 220 of the sound-muffling cover 202, a large number of sound-muffling holes 225 are formed, similar to the sound-muffling cover 2 in the first embodiment. The configuration of the sound deadening hole 225 is the same as that of the sound deadening cover 2. That is, the muffling hole 225 has a circular shape and passes through the cylindrical body 220 so that the inner circumferential surface and the outer circumferential surface thereof communicate with each other. The penetration center line of each muffling hole 225 is formed to be perpendicular to the center line L1 (FIG. 2) of the introduction pipe 14.

In addition, the inner surface of each sound deadening hole 225 is composed of a continuously formed cylindrical surface and an inclined surface, and while the inner diameter of the cylindrical surface is constant along the penetration center line, The inclined surface is inclined so that the inner diameter gradually decreases from the inner peripheral surface to the outer peripheral surface of the cylindrical body 220.

Therefore, as in the first embodiment described above, when the passing sound generated when steam passes through the mesh filter 4 enters the silencing hole 225, the passing sound is reflected on the slope and diffused, suppressing the passing sound. It will be done. Furthermore, since the sound deadening cover 202 is made of rubber, passing sound is further suppressed due to vibrations caused by the shaking of the rubber material itself under steam pressure.

In addition, in this embodiment, since the gap length L20 between the outer peripheral surface of the mesh filter 4 and the inner peripheral surface of the sound deadening cover 202 is secured wider, the sound passing through the mesh filter 4 is diffusely reflected over a wider range. and spread it. Therefore, the friction during diffusion increases, the amount of conversion from sound energy to thermal energy of the passing sound increases, and the vibration of the passing sound is sufficiently weakened, so that the passing sound can be suppressed more reliably.

Note that the inner diameter of the upper end (or both ends) of the sound deadening cover 202 in this embodiment is configured to have the same length as the sound deadening cover 2 in the first embodiment, so the dimensions shown in the first embodiment are not the same. It is possible to attach a sound deadening cover 202 to the inlet pipe 14 having the above-mentioned structure. Therefore, the sound deadening cover 2 according to the first embodiment and the sound deadening cover 202 according to this embodiment can be easily replaced, and the versatility of the sound deadening cover can be increased.

[Other embodiments]
In the above-mentioned embodiment, the heating device 1 was used as an example of the steam using device, but the device is not limited to this, and as long as the device is equipped with a steam filter that filters introduced steam, different configurations, The vapor filter cover provided with the through holes of the present invention can be applied to other devices with functions.

Further, in the above-described embodiment, the mesh filter 4 is illustrated as an example of the vapor filter, but a vapor filter having other shapes and structures may be used as long as the filter is made of mesh metal and filters vapor. For example, a vapor filter with a shape different from a cylindrical shape can be employed.

Further, in the above-described embodiment, the sound deadening cover 2 is used as an example of the steam filter cover, but steam filter covers having other shapes and structures may be used as long as they have a through hole with a sound deadening slope formed on the inner surface of the through hole. may also be used. For example, it is possible to employ a steam filter cover that has a shape different from a cylindrical shape, such as a planar shape, and that corresponds to the shape of the steam filter to which it is attached.

Further, although a large number of sound deadening holes 25 formed in the cylindrical body 20 are illustrated as the through holes, more or fewer sound deadening holes 25 may be formed than the illustrated number. Furthermore, although the inclined surface 25b with an inclination angle k of approximately 40 degrees has been illustrated as the sound-deadening inclined surface, other angles less than 45 degrees or angles greater than 45 degrees may also be adopted.

Furthermore, in the above-described embodiment, an example was shown in which the sound deadening cover 2 is made of a rubber material, but the vapor filter cover may be made of an elastic member other than a rubber material, such as urethane sponge or glass wool. You can also do it. Moreover, materials other than elastic members, such as resin materials and metal materials, can also be used as the material for the vapor filter cover.

1: Heating device 2, 202: Sound deadening cover 4: Mesh filter 14: Inlet pipe
20, 220: Cylindrical body 20a: Inner circumferential surface 20b: Outer circumferential surface 25, 225: Silence hole
25a: Inner surface of sound deadening hole 25b: Inclined surface

Claims (4)

A steam filter cover that is attached to a mesh metal steam filter that filters steam,
a cover body having an inner surface facing the vapor filter and an outer surface that is the back side of the inner surface;
A through hole that communicates the inner surface and the outer surface of the cover main body and through which steam passes from the inner surface to the outer surface, the hole gradually increasing in size from the inner surface to the outer surface. A through hole in which a sound-deadening slope is formed on the inner surface of the through hole,
A steam filter cover characterized by being equipped with. In the steam filter cover according to claim 1,
The cover body is made of an elastic member.
A steam filter cover characterized by: In the steam filter cover according to claim 1 or claim 2,
A diffusion space is formed between the vapor filter and the inner surface of the cover body.
A steam filter cover characterized by: an inflow channel through which steam flows;
a mesh metal vapor filter that filters the vapor flowing in through the inlet channel;
A steam filter cover attached to the steam filter, the steam filter cover comprising:
a cover body having an inner surface facing the vapor filter and an outer surface that is the back side of the inner surface;
A through hole that communicates the inner surface and the outer surface of the cover main body and through which steam passes from the inner surface to the outer surface, the hole gradually increasing in size from the inner surface to the outer surface. a through hole in which a sound-deadening slope is formed on the inner surface of the through hole;
A steam usage device having a steam filter cover, characterized in that: