Noise reduction device for steam heating

Abstract

The utility model discloses a noise reduction device for steam heating, which relates to the technical field of steam heating noise reduction and comprises a base and an outer-layer flow guide cover mounted on the base, a flow guide pressure reduction cavity is formed between the outer-layer flow guide cover and the base, and a steam exhaust duct is arranged on the outer-layer flow guide cover and used for exhausting steam entering the flow guide pressure reduction cavity. When the balance weight non-return piece installed on the outer-layer flow guide cover is in a falling-back state, a non-return head of the balance weight non-return piece is matched with a steam outlet of the base to prevent low-pressure steam from entering the flow guide pressure reduction cavity, and when the steam pressure exceeds a critical threshold value, the balance weight non-return piece is pushed to float upwards to enable the steam to enter the flow guide pressure reduction cavity and be discharged. The counter weight non-return piece cannot move and impact in the floating process, impact noise is eliminated, high-temperature and high-pressure steam slowly enters the flow guide pressure reduction cavity without impact, meanwhile, the steam dryness is improved, and the heating efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of noise reduction devices for steam heating, applied in steam catering and other industries. BACKGROUND

[0002] Steam cooking is a kind of efficient and healthy cooking method, but in household steam pot product, due to the generation of large noise when using, leading to its market share is lower in household appliances. In order to solve this problem, noise reduction exhaust valve is usually configured in steam pot. However, the independent structure check valve used in the noise reduction exhaust valve in the prior art is easy to move and collide with the components during floating, thereby generating noise, and it is not easy to control the pressure and temperature when steam initially enters the heating cavity, and a small flow and low temperature steam initially entering the heating cavity will generate a large amount of condensate water, and when the later high flow and high temperature steam enters the heating cavity and contacts with the condensate water, it will produce thermodynamic effect, which will produce certain noise in the cooking device. Therefore, it is necessary to design a steam pot noise reduction silent device with excellent noise reduction effect, which can effectively reduce the movement and collision of check valve during floating, and reduce the amount of condensate water in the heating cavity, so as to achieve better silent effect. SUMMARY

[0003] Therefore, the utility model aims at providing a kind of noise reduction devices for steam heating, aims at solving the technical problems that noise reduction exhaust valve reduces noise due to the collision of check valve movement, and the amount of condensate water in heating cavity is large, which causes poor noise reduction effect of heating device.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A kind of noise reduction devices for steam heating, including base and outer flow guide cover installed on base, and guide flow pressure reducing chamber is formed between the two, outer flow guide cover is equipped with exhaust hole, exhaust hole is used to make steam entering guide flow pressure reducing chamber exhaust, counterweight check valve is in the state of falling back when being installed on outer flow guide cover, the check head of counterweight check valve cooperates with the steam outlet of base to prevent low pressure steam from entering guide flow pressure reducing chamber, and steam pressure exceeds critical threshold value to push counterweight check valve to float to make steam enter guide flow pressure reducing chamber and exhaust.

[0006] Further, outer flow guide cover is slidingly installed on base, and outer flow guide cover moves with counterweight check valve.

[0007] Further, base is provided with limiting clamping groove, and outer flow guide cover is provided with limiting clamping convex matched with limiting clamping groove, and limiting clamping convex reciprocates in limiting clamping groove.

[0008] Further, counterweight check valve further includes counterweight block connected with check head, and counterweight block is located outside outer flow guide cover.

[0009] Further, the check head is frustoconical.

[0010] Further, the flow guide pressure reduction cavity comprises a gap cavity formed between the end surface of the outer flow guide cover and the base and an annular cavity formed between the peripheral surface of the outer flow guide cover and the base, the gap cavity and the annular cavity are in communication, and the steam exhaust channel is arranged at the annular cavity.

[0011] Further, a flow guide channel for noise reduction is arranged in the flow guide pressure reduction cavity.

[0012] Further, the steam inlet of the base is connected with the steam outlet nozzle, and a connecting seat detachably connected to the base is used to be connected with a corresponding device.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The counterweight check piece is installed and guided by the outer flow guide cover, so that the check head moves along a defined track in the floating process, and the check head will not move and collide to generate noise under the action of turbulent steam; the check head in the floating state can also act as a flow guide medium for steam, effectively dispersing the steam flow, and significantly reducing the noise generated by turbulent steam flow, optimizing the quietness of the cooking environment.

[0015] 2. The outer flow guide cover moves with the counterweight check piece, the outer flow guide cover has a certain counterweight effect, and ensures that steam can only enter the cooking chamber when the steam pressure exceeds the preset critical value, which is designed to prevent low-pressure steam from flowing in too early, which may quickly condense into condensed water, thereby affecting the subsequent heating efficiency of the food and the amount of condensed water generated; when the steam pressure rises above the critical threshold of the counterweight ball, the outer flow guide cover moves with the check piece, and the volume of the flow guide pressure reduction cavity changes while the outer flow guide cover moves, the volume increases accordingly with the increase of the steam flow, avoiding the formation of throttling when a large amount of steam flows in a narrow channel, which causes a large number of molecules to collide in the moving process to form sound waves, the volume of the flow guide pressure reduction cavity changes dynamically with the steam flow, ensuring smooth flow of steam, and the flow guide pressure reduction cavity diffuses and depressurizes the steam entering it, which not only helps the steam to be more evenly distributed, but also further reduces the turbulent noise between the steam, optimizing the quietness of the cooking environment.

[0016] 3. The use of the counterweight block can increase the counterweight force, the greater the steam pressure, the higher the steam purity, thereby improving the dryness of the steam, enabling the heating chamber to quickly heat up in a short time, reducing the amount of condensed water, and the counterweight block is located outside the outer flow guide cover, which will not make the structure of the outer flow guide cover larger, thereby not affecting the volume of the flow guide pressure reduction cavity. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this patent, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and serve to explain the principles of the application. The drawings are not intended to be to scale. Features that are significantly load-bearing or cause structural change to the device are highlighted in the drawings.

[0018] Figure 1 Structure diagram of the present application Figure 1 .

[0019] Figure 2 Structure diagram of the present application Figure 2 .

[0020] Figure 3 Structure diagram of the present application Figure 3 .

[0021] BRIEF DESCRIPTION OF DRAWINGS: 1 - base; 11 - steam inlet; 12 - steam outlet; 13 - limiting slot; 2 - outer flow guide cover; 21 - steam discharge channel; 22 - limiting card convex; 5 - counterweight check element; 51 - check head; 52 - counterweight block; 6 - steam outlet nozzle; 7 - connecting seat. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present application more clear, specific embodiments and drawings are used to make further detailed description of the present application. Here, the illustrative embodiments of the present application and their descriptions are used to explain the present application, but not as a limitation of the present application.

[0023] Reference Figures 1 to 3 As Figure 1 , Figure 2 and Figure 3 shown, the present embodiment provides a noise reduction device for steam heating, which is constructed of a base 1 and an outer flow guide cover 2 fixed on the base 1, and a flow guide and pressure reduction cavity is constructed between the two. The design of this cavity aims to make the incoming steam widely diffuse, this process not only effectively relieves the steam flow pressure, thereby reducing the steam flow noise caused by high pressure, but also avoids the direct impact of steam on the cavity wall by guiding the dispersion of steam flow direction, effectively suppressing the generation of turbulent flow and its accompanying turbulent noise. The outer flow guide cover 2 is ingeniously provided with a steam discharge channel 21 to guide the steam in the flow guide and pressure reduction cavity into the cooking cavity.

[0024] In particular, the counterweight check valve 5 installed on the outer flow guide cover 2, when it is in the falling state, its check head 51 can be tightly matched with the steam outlet 12 of the base 1, effectively preventing the low-pressure steam from flowing backward into the flow guide pressure reduction cavity. This design aims to prevent the low-pressure steam from entering too early and possibly condensing into condensed water quickly, which may adversely affect the subsequent heating efficiency of the food. On the other hand, at the initial stage of steam generation, the steam in the steam generator cavity cannot be discharged due to the counterweight check valve 5, which causes the pressure and temperature in the steam generator cavity to rise rapidly. In the process of temperature rise and pressure increase, the air dissolved in the water entering the steam generator will quickly generate bubbles and burst, and as the pressure increases, the bubbles expand small, thus the explosion sound is small, greatly reducing the working noise of the heating device at the initial stage of steam generation. When the steam pressure rises to the preset critical threshold, the counterweight check valve 5 will be pushed to float, allowing the steam to smoothly enter the flow guide pressure reduction cavity and be discharged. When the counterweight check valve 5 is in the floating state, the temperature of the steam generator is high, the steam generation rate is high, the pressure in the steam generator cavity is high, the bubbles expand small and burst quickly, and the explosion sound is small. When the pressure is not enough, the counterweight check valve 5 is used for pressure processing, and in the process of continuous steam generation, the noise in the steam generator cavity will be smaller, and the check head 51 not only plays a blocking role, but also further disperses and diffuses the steam flow through floating, effectively reducing the degree of turbulence of the steam flow, reducing high-frequency vibration, and significantly dispersing the steam flow, thereby greatly reducing the noise caused by turbulent steam flow.

[0025] In addition, the outer flow guide cover not only provides a mounting base for the counterweight check valve, but also ensures the guiding and limiting function during the floating process, so that the check head can move smoothly along the preset trajectory, avoiding the influence of turbulent steam flow and further eliminating potential noise sources.

[0026] In the utility model, the noise reduction silent device further comprises a connecting seat 7 which is separably connected to the base 1, the connecting seat 7 is used to be connected with the corresponding device, the steam inlet 11 of the base 1 is connected with a steam outlet nozzle 6 in a plug-in manner, and a sealing ring is arranged at the steam outlet nozzle 6, the sealing ring is used to ensure that the steam flow can be effectively treated by the noise reduction silent device before entering the heating device. In use, the connecting seat 7 is first fixedly installed on the corresponding device, and then the combined structure of the base 1, the counterweight ball 3, the outer flow guide cover 2 and the steam outlet nozzle 6 is installed by inserting the steam outlet nozzle 6 into the steam outlet of the steam generator through the base 1 and the connecting seat 7, or the steam outlet nozzle 6 is first inserted into the steam outlet of the steam generator, and then the combined structure of the base 1, the counterweight ball 3 and the outer flow guide cover 2 is installed by inserting the steam inlet 11 into the steam outlet nozzle 6 through the base 1 and the connecting seat 7.

[0027] In the application, the connecting seat 7 is annular, and the base 1 is fixedly installed with the connecting seat 7 through threaded connection.

[0028] In the actual design process, the connecting seat 7 can also be connected with the base 1 through elastic clamping.

[0029] In the utility model, the base 1 can be made of 316L stainless steel which is resistant to high temperature and corrosion or made of titanium alloy.

[0030] In the utility model, the outer fairing 2 is designed to be slidably installed on the base 1, and the movement thereof is consistent with the action of the counterweight check valve 5. The accompanying movement characteristics of the outer fairing 2, together with the counterweight effect thereof, ensure that the steam can only be allowed to enter the cooking chamber when the pressure exceeds the preset critical value. The main purpose of this ingenious design is to prevent low-pressure steam from prematurely flowing into the system, because when low-pressure, low-temperature steam enters the cooking chamber, the cooking chamber heats up slowly, which produces a large amount of condensed water, thereby adversely affecting the subsequent heating efficiency of the food (slow heating), and when the late hot steam contacts the condensed water, noise is generated due to the strong thermodynamic effect.

[0031] Because the main reason for the noise generated by the heating device due to the condensation of a large amount of condensed water is that bubbles are formed when steam contacts condensed water, and noise is generated when the bubbles burst. When high-temperature steam contacts low-temperature condensed water, the steam condenses rapidly, causing a sudden drop in local pressure. This pressure change can cause dissolved gas (such as air) in the condensed water to come out, forming tiny bubbles. After the bubbles are formed, they are affected by the pressure or temperature changes of the surrounding fluid, and quickly burst, generating shock waves and noise, similar to the sound of "gurgling" when water boils, and the bubbles at the bottom of the water burst during the rising process due to pressure changes.

[0032] When the steam pressure rises to exceed the critical threshold of the counterweight check valve 5, the outer fairing 2 will move accordingly. During this movement, the volume of the flow guide pressure reduction chamber will change accordingly, and as the steam flow increases, the volume will gradually increase. This design avoids the throttling effect that may be formed when a large amount of steam flows through a narrow channel, reduces the mutual collision of steam molecules during movement, and further reduces the generation of sound waves.

[0033] The volume of the flow guide pressure reduction chamber can be dynamically adjusted according to the change of the steam flow, ensuring smooth flow of the steam. Through this design, the steam entering the flow guide pressure reduction chamber is effectively diffused and depressurized, not only promoting the uniform distribution of the steam, but also further reducing the turbulent noise between the steam flows, thereby optimizing the tranquility of the cooking environment.

[0034] In this invention, to facilitate the quick assembly, disassembly, and maintenance of the combination of the outer fairing 2 and the counterweight check valve 5, a limiting slot 13 is designed on the base 1, and the outer fairing 2 is equipped with a matching limiting protrusion 22. This design allows the limiting protrusion 22 to achieve smooth and stable reciprocating movement within the limiting slot 13, ensuring the firmness of the outer fairing 2 installation and greatly simplifying the overall assembly and disassembly process of the combination of the outer fairing 2 and the counterweight check valve 5, thus improving operational convenience.

[0035] Furthermore, the engagement mechanism between the limiting slot 13 and the limiting protrusion 22 effectively guides the outer guide shield 2 to correct alignment during assembly and disassembly, ensuring the counterweight check valve 5 is reliably centered and avoiding performance degradation or damage risks due to improper installation. Simultaneously, this engagement enhances the overall structural stability of the device, ensuring the outer guide shield maintains its accurate installation position throughout long-term use, providing a solid guarantee for smooth steam flow and efficient noise reduction. In summary, this design improves ease of assembly and disassembly while also ensuring structural stability and durability.

[0036] In this invention, the counterweight check valve 5 is composed of a check valve 51 and a counterweight block 52 closely connected to it, wherein the counterweight block 52 is located on the outside of the outer guide shroud 2. The use of the counterweight block 52 increases the counterweight force. As the steam pressure increases, the weight effect of the counterweight block 52 becomes more obvious, which helps to improve the purity of the steam. Higher pressure often means that the steam contains less moisture, thereby increasing the dryness of the steam. Moreover, the higher the pressure of the steam, the higher the temperature and the faster the bubble precipitation rate. Steam with higher dryness can transfer heat more efficiently, accelerate the heating speed of food, shorten the heating time of the heating chamber, and produce less condensate. The thermodynamic effect generated when hot steam comes into contact with condensate is further weakened, which further reduces the noise of the heating device. Placing the counterweight block 52 on the outside of the outer guide shroud 2 does not require increasing the size of the outer guide shroud 2, and therefore does not affect the volume of the decompression chamber.

[0037] In this invention, the stop valve 51 is truncated cone-shaped, and the corresponding steam outlet 12 is also cone-shaped, 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.

[0038] 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.

[0039] In the utility model, the flow guiding and pressure reducing cavity is composed of the gap cavity formed between the outer flow guide cover 2 and the end surface of the base 1 and the annular cavity constructed between the peripheral surfaces of the two parts, and the two parts are in communication with each other. The steam exhaust channel 21 is arranged at the annular cavity part. After the steam flows into the gap cavity of the flow guiding and pressure reducing cavity, the steam is diffused into the annular cavity. The design of the annular cavity promotes the uniform diffusion of the steam flow, effectively preventing the sharp fluctuation of the local pressure. Subsequently, the uniformly dispersed steam flow can smoothly enter the steamer through the steam exhaust channel 21. The overall layout of the steam exhaust channel 21 and the flow guiding and pressure reducing cavity is like a labyrinth, guiding the steam flow to continuously diffuse during the passing process and gradually slow down. This structural design not only effectively eliminates the high-frequency noise component, but also greatly reduces the impact force generated by the steam flow impacting the inner wall of the flow guiding and pressure reducing cavity, thereby significantly reducing the impact noise caused thereby, ensuring the tranquility and stability of the steamer during operation.

[0040] In order to further disperse the steam flow, reduce the speed and pressure of the steam flow, and reduce the turbulent sound and high-frequency vibration sound of the steam flow, a plurality of regular or irregular flow guiding channels are arranged in the flow guiding and pressure reducing cavity. The arrangement of the flow guiding channels can disperse the steam flow in an orderly and shapeless manner, which is helpful to further reduce the turbulent noise.

[0041] In the utility model, the flow guiding channels can be spiral grooves arranged on the base 1 and / or the outer flow guide cover 2. The spiral grooves are spiral grooves produced by machining or formed by spiral ribs arranged on the side wall. The spiral channels are used to forcibly divert the steam flow, reduce the flow rate of the steam flow, reduce the vibration frequency of the steam flow, and further reduce the sound generated by the flow of the steam flow; or the flow guiding and pressure reducing cavity is divided by the hollow frame body arranged between the base 1 and the outer flow guide cover 2.

[0042] As Figure 1 , Figure 2 and Figure 3 Due to the light and floating characteristics of the hot steam and the characteristics that the hot steam continuously flows into the cooking cavity to drive the hot steam to float upward, in order to enable the hot steam to quickly fill in the cooking cavity and enable the food located in the lower layer to be quickly and uniformly heated, the steam exhaust channel 21 is arranged on the side surface of the outer flow guide cover 2, so that the steam flow first flows downward and then flows upward by using the light and floating characteristics, the hot steam is more uniformly filled in the heating cavity, and the food is uniformly heated.

[0043] The utility model can stably reduce noise for a long time through a mechanical structure, without frequent maintenance or replacement of parts, thereby saving time and cost for users.

[0044] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A noise reduction device for steam heating, characterized by, The base (1) and the outer fairing (2) are installed on the base (1) and form a fairing pressure reduction cavity, the outer fairing (2) is provided with a steam exhaust channel (21) for steam entering the fairing pressure reduction cavity, when the counterweight check valve (5) is in a falling state, the check head (51) of the counterweight check valve (5) cooperates with the steam outlet (12) of the base (1) to prevent low-pressure steam from entering the fairing pressure reduction cavity, and when the steam pressure exceeds a critical threshold, the counterweight check valve (5) is pushed to float to make the steam enter the fairing pressure reduction cavity and be exhausted.

2. The noise reduction device for steam heating according to claim 1, wherein The outer fairing (2) is slidingly installed on the base (1), and the outer fairing (2) moves with the counterweight check valve (5).

3. The noise reduction device for steam heating according to claim 2, wherein The base (1) is provided with a limiting clamping groove (13), and the outer fairing (2) is provided with a limiting clamping convex (22) matched with the limiting clamping groove (13), and the limiting clamping convex (22) reciprocates in the limiting clamping groove (13).

4. The noise reduction device for steam heating according to claim 1, wherein The counterweight check valve (5) further comprises a counterweight block (52) connected with the check head (51), and the counterweight block (52) is located outside the outer fairing (2).

5. The noise reduction device for steam heating according to claim 1, wherein The check head (51) is in the shape of a truncated cone.

6. The noise reduction device for steam heating according to claim 1, wherein The fairing pressure reduction cavity comprises a gap cavity formed between the end faces of the outer fairing (2) and the base (1) and an annular cavity formed between the circumferential surfaces of the outer fairing (2) and the base (1), the gap cavity and the annular cavity are connected, and the steam exhaust channel (21) is arranged at the annular cavity.

7. The noise reduction device for steam heating according to claim 1, wherein A fairing channel for noise reduction is arranged in the fairing pressure reduction cavity.

8. The noise reduction device for steam heating according to claim 1, wherein The steam inlet (11) of the base (1) is connected with the steam outlet nozzle (6) in a plug-in manner, and the connecting seat (7) connected with the base (1) in a detachable manner is used to be connected with a corresponding device.

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