A noise reduction silencer for steam heating

Abstract

The utility model discloses a kind of steam heating is used to reduce noise mute device, it is related to steam heating noise reduction technical field, including the base and outer fairing of being installed together, and the base is formed with the fairing of being guided into the pressure reduction cavity between outer layer, outer fairing has the steam hole for the steam body of being guided into pressure reduction cavity into the exhaust steam channel, counterweight ball is placed in the steam outlet of base, and the fairing of being guided into the channel for reducing noise is equipped in pressure reduction cavity. The utility model passes through shunting steam flow, makes steam flow in the fairing of being guided into pressure reduction, reduces speed, reduces steam flow turbulent flow, effectively eliminates high-frequency noise, in turn reaches the effect of noise reduction, simultaneously, using counterweight ball can prevent low-pressure steam from entering heating cavity in advance to cause condensate accumulation to influence heating efficiency.

Description

Technical Field

[0001] This utility model relates to a noise reduction and silencing device for steam heating, which can be applied to industries such as steam catering. Background Technology

[0002] The principle of steam cooking is to place the food to be cooked in a steaming tray or steaming plate, then place the tray or steaming plate into the inner pot, seal the inner pot with a lid, and introduce high-pressure, high-temperature steam into the inner pot to cook the food. The steam in a steam cooker is usually generated by a steam generator and sprayed into the inner pot through nozzles. In the commercial sector, steam heating is relatively mature. Although the steam flow generates considerable noise during use, it does not affect actual use. For household steam cookers, while they offer advantages such as high cooking efficiency, ease of use, and health benefits, the noise issue directly leads to a low market share in the home appliance market due to the intended use. Although most existing steam cookers are equipped with noise-reducing exhaust valves at the steam generator outlet, the noise reduction effect of existing valves is unsatisfactory. Therefore, it is necessary to design a noise-reducing and silent device for steam cookers with better noise reduction performance. Utility Model Content

[0003] Therefore, this utility model aims to provide a noise reduction and silencing device for steam heating, and to solve the technical problem of poor noise reduction effect of current noise reduction exhaust valves.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A noise reduction and silencing device for steam heating includes a base and an outer guide shroud installed together. A flow-guiding and pressure-reducing cavity is formed between the base and the outer guide shroud. The outer guide shroud has an exhaust channel for the steam entering the flow-guiding and pressure-reducing cavity to be discharged. A counterweight ball is placed in the steam outlet of the base. Several flow-guiding channels for noise reduction are provided in the flow-guiding and pressure-reducing cavity.

[0006] Furthermore, the flow-guiding and pressure-reducing cavity includes an annular cavity formed between the outer flow guide and the circumferential surface of the base, and the exhaust channel is located in the annular cavity.

[0007] Furthermore, the steam outlet is flared out with a gradually changing inner diameter, forming a steam diffusion and pressure reduction cavity.

[0008] Furthermore, the flow channel includes an annular groove on the inner wall of the steam outlet, and an elastic latch is installed in the annular groove to limit the floating height of the counterweight ball.

[0009] Furthermore, the flow channel also includes spiral grooves disposed on the base and / or the outer flow shield.

[0010] Furthermore, the flow-guiding and pressure-reducing chamber is equipped with a blocking and silencing structure, and the steam is discharged along the exhaust port after passing through the blocking and silencing structure.

[0011] Furthermore, the noise reduction structure has dense noise reduction holes, and the noise reduction structure is limited within the steam flow diffusion and pressure reduction chamber at the steam outlet by the supporting part of the outer guide shroud.

[0012] Furthermore, the opening end of the outer shroud is trumpet-shaped, and the boss of the base has a flow guiding slope. An annular flow guide port with the outlet located on the lower slope is formed between the opening end of the outer shroud and the flow guiding slope.

[0013] Furthermore, the steam inlet and outlet of the base are connected by a plug-in connection, and the connector that can be detachably connected to the base is used to connect to the corresponding device.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The application of a counterweight ball ensures that steam can only enter the cooking chamber when the steam pressure exceeds a preset critical value. This design aims to prevent low-pressure steam from rushing in prematurely, as it may quickly condense into condensate, thus affecting the subsequent heating efficiency of the food. When the steam pressure rises above the critical threshold of the counterweight ball, the counterweight ball will float. At this point, it not only acts as a steam guiding medium, effectively dispersing the steam flow, but also significantly reduces noise caused by steam turbulence. To further improve performance, the counterweight ball is closely integrated with the design of the flow-guiding and pressure-reducing chamber. The function of the flow-guiding and pressure-reducing chamber is to diffuse and reduce the pressure of the steam entering it. This process not only helps the steam to be distributed more evenly, but also further reduces the turbulence noise between steam flows, optimizing the quietness of the cooking environment.

[0016] 2. The design of the flow guide channel disperses the airflow, which helps to further reduce turbulence noise.

[0017] 3. The application of the barrier and silencing structure: When steam passes through the dense porous structure of the barrier and silencing structure, the steam dispersion effect will be better, reducing turbulence noise. At the same time, after the sound wave enters the pores, it will propagate, reflect and rub within them. The energy of the sound wave will be gradually absorbed and dissipated, thereby converting the sound energy into heat energy or other forms of energy, thus attenuating the sound wave.

[0018] 4. By utilizing the combined action of the flow guide channel, counterweight ball, and sound-absorbing structure, the resistance to the steam flow is increased, causing the steam flow to slow down, decrease in pressure, and disperse, thereby consuming the steam flow energy and attenuating the sound energy. Attached Figure Description

[0019] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0020] Figure 1 This is a schematic diagram of the first structure of the present utility model. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the first structure of the present utility model. Figure 2 .

[0022] Figure 3 This is a schematic diagram of the first structure of the present utility model. Figure 3 .

[0023] Figure 4 This is a schematic diagram of the second structure of the present invention. Figure 1 .

[0024] Figure 5 This is a schematic diagram of the second structure of the present invention. Figure 2 .

[0025] Figure 6 This is a schematic diagram of the second structure of the present invention. Figure 3 .

[0026] Explanation of reference numerals in the attached drawings: 1-base; 11-steam inlet; 12-steam outlet; 13-ring groove; 14-protrusion; 141-guide slope; 2-outer guide shroud; 21-exhaust channel; 3-counterweight ball; 4-barrier and noise reduction structure; 6-steam outlet nozzle; 7-connecting seat. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this utility model are used to explain the present utility model, but are not intended to limit the present utility model.

[0028] Example 1

[0029] refer to Figures 1 to 3 ,like Figure 1 , Figure 2 and Figure 3As shown, this embodiment provides a noise reduction and silencing device for steam heating, including a base 1 and an outer guide shroud 2 installed together. A flow-guiding and pressure-reducing cavity is formed between the base 1 and the outer guide shroud 2. The flow-guiding and pressure-reducing cavity allows the steam entering the cavity to diffuse. This diffusion process not only effectively reduces the steam pressure and reduces the steam noise generated by high pressure, but also reduces the direct collision between the steam and the cavity wall by dispersing the steam flow direction, thereby suppressing the formation of turbulence and its accompanying turbulence noise. The outer guide shroud 2 has exhaust holes for the steam entering the flow-guiding and pressure-reducing cavity to be discharged. Channel 21 allows steam to reliably enter the cooking chamber. A counterweight ball 3 is placed inside the steam outlet 12 of the base 1. The application of the counterweight ball 3 ensures that steam can only enter the cooking chamber when the steam pressure exceeds a preset critical value. This design aims to prevent low-pressure steam from rushing in prematurely, as it may quickly condense into condensate, thus affecting the subsequent heating efficiency of the food. Furthermore, in the initial stage of steam generation, the counterweight ball 3 prevents the steam located in the steam generation chamber from escaping, thereby causing the pressure and temperature inside the steam generation chamber to rise rapidly. During the process of heating and pressurizing, dissolved... Air entering the water of the steam generator rapidly forms bubbles that burst. As pressure increases, the bubbles expand to smaller sizes, resulting in quieter bursts and significantly reducing the noise from the heating device during the initial steam generation phase. When the steam pressure rises above the critical threshold of counterweight sphere 3, it floats. At this point, the steam generator experiences high temperatures, a high steam generation rate, and high pressure within the steam generation chamber. The bubbles expand to smaller sizes and burst rapidly, producing quieter bursts. When the pressure is insufficient, the falling counterweight sphere 3 provides additional pressure, thus ensuring continuous steam generation. The noise inside the steam generation chamber will be reduced. At the same time, the obstruction and floating effect of the counterweight ball 3 can not only disperse and diffuse the steam flow, thereby reducing the turbulence and high-frequency vibration of the steam flow, but also effectively disperse the steam flow direction and significantly reduce the noise caused by steam turbulence. In addition, it can also prevent the steam flow from directly impacting the outer guide shroud 2 at high speed, reducing noise and extending the service life of the outer guide shroud 2. The guide pressure reducing chamber is equipped with several guide channels for noise reduction. The arrangement of the guide channels will allow the steam flow to disperse in an orderly manner, which will help to further reduce turbulence noise.

[0030] In actual use, the counterweight ball 3 is made of different materials to form counterweight balls 3 with different weights. By selecting counterweight balls 3 of different weights, it is ensured that it responds accurately under specific steam pressure. Before the steam enters the cooking chamber, it can reduce the heat loss of the steam generator, so that the steam pressure can reach the standard in a short time, thereby shortening the preheating time of the steam generator. The counterweight ball 3 floats neither too early nor too late, which makes it easy to accurately control the time when the steam enters the cooking chamber, so that the heating speed of the steam generator and the heating speed of the cooking chamber are both fast, thus improving the heating efficiency.

[0031] In this invention, the noise reduction and silencing device also includes a connecting seat 7 detachably connected to the base 1. The connecting seat 7 is used to connect to the corresponding device. A steam outlet 6 is inserted into the steam inlet 11 of the base 1. A sealing ring is provided at the steam outlet 6 to ensure that the steam flow effectively passes through the noise reduction and silencing device for noise reduction treatment before entering the heating device. In use, the connecting seat 7 is first fixedly installed on the corresponding device. Then, the combined structure of the integrated base 1, counterweight ball 3, outer guide shroud 2, and steam outlet 6 is installed by connecting the base 1 and the connecting seat 7 to insert the steam outlet 6 into the steam outlet of the steam generator to complete the installation. Alternatively, the steam outlet 6 can be inserted into the steam outlet of the steam generator first, and then the combined structure of the integrated base 1, counterweight ball 3, and outer guide shroud 2 can be installed by connecting the base 1 and the connecting seat 7 to insert the steam inlet 11 into the steam outlet 6 to complete the installation.

[0032] Preferably, in this application, the connecting seat 7 is ring-shaped, and the base 1 and the connecting seat 7 are fixedly installed by threaded connection.

[0033] In the actual design process, the connector 7 can also be connected to the base 1 by a flexible snap-fit ​​method.

[0034] In this utility model, the base 1 can be made of high-temperature resistant and corrosion-resistant 316L stainless steel or titanium alloy; the outer guide shroud 2 has a ring structure with one end sealed, and when in use, the sealed end of the outer guide shroud 2 faces upward to prevent steam condensate from flowing back in; the outer guide shroud 2 can be detachably connected to the base 1 by a threaded connection or an elastic snap-fit ​​connection. The detachable installation of the outer guide shroud 2 facilitates the cleaning and maintenance of the interior of the noise reduction and silencing device, and also facilitates the assembly of the noise reduction and silencing device.

[0035] In this invention, to ensure effective dispersion of steam flow within the noise reduction and silencing device, the flow-guiding and pressure-reducing chamber includes an annular cavity formed between the outer flow guide shroud 2 and the base 1. Steam enters the annular cavity and then exits through the exhaust port 21. After entering the flow-guiding and pressure-reducing chamber, the steam diffuses and enters the annular cavity, which ensures uniform steam diffusion, thus avoiding rapid changes in local pressure. Subsequently, the steam enters the steamer through the exhaust port 21. The layout of the exhaust port 21 and the flow-guiding and pressure-reducing chamber resembles a maze, causing the steam to continuously diffuse and gradually decrease in speed as it passes through. This diffusion and deceleration process not only effectively eliminates high-frequency noise but also significantly reduces the impact force of the steam flow striking the inner wall of the flow-guiding and pressure-reducing chamber, thereby greatly reducing impact noise.

[0036] In this invention, the steam outlet 12 is an flared opening with a gradually changing inner diameter, forming a steam diffusion and pressure reduction chamber. The application of the steam diffusion and pressure reduction chamber allows the steam flow to gradually diffuse, avoiding the rapid expansion and pressure reduction of steam that would cause rapid collisions between gas molecules and generate vortices, thus preventing the sound waves produced.

[0037] The steam diffusion and pressure reduction chamber can also guide the diffusion of steam flow. The inclined surface of the steam diffusion and pressure reduction chamber guides the steam flow to disperse in an orderly manner, thereby avoiding reflection and re-collision of the steam flow on the inner wall of the chamber. This design fundamentally reduces the possibility of turbulence generation and further reduces the noise level.

[0038] To further disperse the steam flow, reduce its speed and pressure, and decrease the turbulence and high-frequency vibration noise, the flow guiding and pressure reducing chamber is equipped with several regular or irregular flow guiding channels.

[0039] In this invention, the flow guiding channel includes an annular groove 13 disposed on the inner wall of the steam outlet 12. An elastic locking mechanism is installed within the annular groove 13 to limit the floating height of the counterweight ball 3, preventing the counterweight ball 3 from floating too high and weakening its steam dispersion and guiding function. After heating is complete, it also ensures that the counterweight ball 3 falls quickly to reduce the amount of low-pressure steam entering the cooking cavity. The annular groove 13 includes a single annular groove or a single annular groove with one end connected to and extending upwards into a spiral annular groove. The elastic locking mechanism is installed within the single annular groove. The spiral annular groove dampens and slows down the steam flow moving along the inner wall of the steam outlet 12, thereby reducing friction noise.

[0040] In this invention, the flow guiding channel also includes a spiral groove disposed on the base 1 and / or the outer flow guiding cover 2. The spiral groove is a spiral groove produced by machining or formed by spiral ribs disposed on the side wall. The spiral channel formed forces the steam flow to change direction, reduces the steam flow velocity, reduces the vibration frequency of the steam flow, and thus reduces the sound generated by the steam flow.

[0041] In this embodiment, the cross-section of the spiral rib can be in the shape of an isosceles trapezoid.

[0042] In this embodiment, the flow channel can also be formed by separating the flow decompression chamber through a hollow frame set between the base 1 and the outer flow shroud 2.

[0043] Example 2

[0044] like Figure 4 , Figure 5 and Figure 6 As shown, based on Embodiment 1, in order to accelerate the flow of steam in different channels and block turbulence, and at the same time use the reduction in steam speed and pressure to eliminate high-frequency noise, a blocking and silencing structure 4 is provided in the flow guiding and pressure reducing chamber. After the steam passes through the blocking and silencing structure 4, it is discharged along the exhaust port 21. Because the structure has dense honeycomb-shaped silencing holes, the steam will be fragmented and dispersed when it passes through the blocking and silencing structure 4, damping the sound wave vibration, reducing the high-frequency vibration of molecules, thereby eliminating high-frequency noise, and the speed reduction effect is significant. The noise generated by the steam flow is reduced by reducing the flow velocity.

[0045] In this embodiment, preferably, the blocking and silencing structure 4 is flat, and the large end of the steam diffusion and pressure reduction cavity is provided with a concave cavity for the installation and limiting of the blocking and silencing structure 4. The blocking and silencing structure 4 may or may not float in the concave cavity. The blocking and silencing structure 4 is limited in the steam diffusion and pressure reduction cavity by the supporting part of the outer guide shroud 2 to prevent the blocking and silencing structure 4 from leaving the concave cavity, so that a gap is formed between the blocking and silencing structure 4 and the outer guide shroud 2. The low-pressure steam flows continuously through the narrow gap, which further reduces the speed of the steam flow and makes the sound of the steam flow even smaller.

[0046] In this embodiment, the sound-absorbing structure 4 can be formed by sintering multiple layers of stainless steel mesh, or it can be formed by combining ceramic fiber (high temperature resistant, melting point ≥1600℃) with stainless steel mesh, or it can be formed by 3D printing of polyester fiber. The aperture of the sound-absorbing structure 4 is between 0.5mm and 1.0mm, and the shape of the sound-absorbing hole can be rhomboid, regular hexagon, triangle or other geometric shapes.

[0047] Example 3

[0048] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 Due to the light and floating nature of hot steam and the characteristic that the continuous influx of hot steam into the cooking cavity will cause the hot steam to rise, in order to enable the hot steam to quickly fill the cooking cavity so that the food in the lower layer can also be heated quickly and evenly, the structure of the steam vent 21 is designed and limited.

[0049] like Figure 4 , Figure 5 and Figure 6 As shown, the exhaust channel 21 can be set on the side of the outer guide shroud 2, and the exhaust channel 21 extends radially or is inclined downward. The exhaust channel 21 extends radially, which is simple to process. When the exhaust channel 21 is inclined downward at a certain angle, it can guide the steam flow after it is ejected, so that the steam flow first goes downward and then goes upward using its light and buoyant characteristics, so that the hot steam fills the heating chamber more evenly and the food is heated evenly.

[0050] like Figure 1 , Figure 2 and Figure 3 As shown, the exhaust duct 21 can be located inside the outer guide shroud 2 and parallel to the axis. The steam discharged through the exhaust duct 21 is then discharged through the guide port formed between the opening of the outer guide shroud 2 and the base 1, which obstructs and slows down the steam flow, further reducing turbulence and thus achieving noise reduction.

[0051] Specifically, the inner wall of the outer guide shroud 2 has an inner convex ring, which can be connected to the base 1, and the exhaust channel 21 is provided on the inner convex ring.

[0052] Furthermore, the opening end of the outer guide shroud 2 is trumpet-shaped, and the boss 14 of the base 1 has a guide slope 141. An annular guide port with the outlet located on the lower slope is formed between the opening end of the outer guide shroud 2 and the guide slope 141. The annular guide port ensures that the steam first enters the lower layer of the heating chamber and then rises due to its light buoyancy, making the hot steam fill the heating chamber more evenly and ensuring that the food is heated evenly. The long channel of the annular guide port further enhances the guiding effect.

[0053] Based on the structures in the three embodiments, it is evident that this utility model can stably reduce noise over a long period of time through its mechanical structure, eliminating the need for frequent maintenance or replacement of parts, thus saving users time and costs.

[0054] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the embodiments of the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A noise reduction and silencing device for steam heating, characterized in that, The device includes a base (1) and an outer guide shroud (2) installed together. A flow-guiding and pressure-reducing cavity is formed between the base (1) and the outer guide shroud (2). The outer guide shroud (2) has an exhaust channel (21) for the steam entering the flow-guiding and pressure-reducing cavity to be discharged. A counterweight ball (3) is placed in the steam outlet (12) of the base (1). The flow-guiding and pressure-reducing cavity is provided with several flow-guiding channels for noise reduction.

2. The noise reduction and silencing device for steam heating according to claim 1, characterized in that, The flow-guiding and pressure-reducing cavity includes an annular cavity formed between the outer flow guide shroud (2) and the circumferential surface of the base (1), and the exhaust channel (21) is disposed in the annular cavity.

3. The noise reduction and silencing device for steam heating according to claim 1, characterized in that, The steam outlet (12) is an flared shape with a gradually changing inner diameter, forming a steam diffusion and pressure reduction cavity.

4. The noise reduction and silencing device for steam heating according to claim 1, characterized in that, The flow channel includes an annular groove (13) disposed on the inner wall of the steam outlet (12), and an elastic locking device is installed in the annular groove (13) to limit the floating height of the counterweight ball (3).

5. The noise reduction and silencing device for steam heating according to claim 4, characterized in that, The flow channel also includes a spiral groove disposed on the base (1) and / or the outer flow shield (2).

6. The noise reduction and silencing device for steam heating according to claim 1, characterized in that, The flow-guiding and pressure-reducing chamber is equipped with a blocking and noise-reducing structure (4). After passing through the blocking and noise-reducing structure (4), the steam is discharged along the exhaust port (21).

7. The noise reduction and silencing device for steam heating according to claim 6, characterized in that, The noise reduction structure (4) has dense noise reduction holes, and the noise reduction structure (4) is limited in the steam diffusion and pressure reduction cavity of the steam outlet (12) by the supporting part of the outer guide shroud (2).

8. The noise reduction and silencing device for steam heating according to claim 1, characterized in that, The opening end of the outer layer guide shield (2) is horn-shaped, and the boss (14) of the base (1) has a guide slope (141). An annular guide port with the outlet located on the lower slope is formed between the opening end of the outer layer guide shield (2) and the guide slope (141).

9. The noise reduction and silencing device for steam heating according to claim 1, characterized in that, The steam inlet (11) of the base (1) is connected to the steam outlet (6) by plugging in, and the connecting seat (7) that can be detached from the base (1) is used to connect to the corresponding device.

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