Novel noise reduction structure for pressure cooker

Abstract

This application discloses a novel noise reduction structure for a pressure cooker, comprising: a noise reduction seat with openings at both the top and bottom, and a noise reduction cover that can be opened and closed and is disposed above the noise reduction seat. The noise reduction seat and the noise reduction cover are fitted together to form a receiving cavity covering the pressure vent cap. The noise reduction cover has a vent hole, and the inner sidewall of the noise reduction cover protrudes towards the receiving cavity corresponding to the position of the vent cap, forming a reflux wall. This embodiment, through the enveloping receiving cavity formed by the noise reduction seat and the noise reduction cover, completely covers the pressure vent cap within a closed space, forming a physical barrier layer to directly weaken noise propagation. Simultaneously, the reflux wall forces steam to swirl downwards, reducing steam velocity and impact energy before it is discharged outwards through the vent hole. This dual effect attenuates high-frequency impact noise by over 40%, and the compact integrated structure avoids the volume defects of traditional screw-on devices.

Description

Technical Field

[0001] This utility model belongs to the field of pressure cooker technology, and in particular relates to a novel noise reduction structure for pressure cookers. Background Technology

[0002] Current pressure cookers release steam through a channel consisting of a steam vent cap and a steam vent pipe. Traditional noise reduction devices generally use a screw-locking mechanism consisting of a screw ring and a threaded engagement structure. The screw ring needs to be precisely aligned with the external thread on the pressure cooker lid and fixed by multiple rotations. The installation process requires precise alignment, making it difficult to operate. In addition, it is bulky and occupies the lid space. More importantly, this structure lacks internal noise reduction optimization for the steam vent cap and relies solely on a simple cavity to diffuse steam, resulting in insufficient attenuation of high-frequency airflow impact noise. Furthermore, the screw-locking mechanism is prone to vibration and abnormal noise due to loosening of the threads during long-term use, further degrading the noise reduction effect. It is difficult to simultaneously meet the combined requirements of convenient assembly, compact layout, and efficient and stable noise reduction. Utility Model Content

[0003] (I) Purpose of the utility model

[0004] To overcome the above shortcomings, the purpose of this utility model is to provide a new noise reduction structure for pressure cookers, so as to solve the technical problems of complex installation and large size of screw-on structure, insufficient high-frequency noise attenuation due to lack of internal noise reduction optimization, easy vibration and loosening and abnormal noise after long-term use, and difficulty in balancing convenience, compactness and efficient and stable noise reduction.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the technical solution provided in this application is as follows:

[0007] A novel noise reduction structure for a pressure cooker includes: a noise reduction seat with openings at both the top and bottom, and a noise reduction cover that can be opened and closed and is disposed above the noise reduction seat. The noise reduction seat and the noise reduction cover cover each other to form a receiving cavity covering the pressure vent cap. The noise reduction cover has a vent hole, and the inner side wall of the noise reduction cover protrudes towards the receiving cavity corresponding to the position of the vent cap to form a reflux wall.

[0008] This embodiment uses a noise-reducing base and a noise-reducing cover to form a wrap-around cavity, completely enclosing the pressure vent cap in a closed space, forming a physical barrier layer to directly reduce noise propagation; at the same time, the return wall forces the steam to swirl downwards to counteract the impact, reducing the steam flow rate and impact energy before it is discharged outwards through the exhaust port. The dual effect reduces high-frequency impact noise by more than 40%, and the compact integrated structure avoids the volume defects of traditional screw-on devices.

[0009] In some embodiments, the axial direction of the vent hole is perpendicular to the extension direction of the return wall.

[0010] The vertical orifice design makes the steam jet direction orthogonal to the return path, completely dispersing residual vortices, eliminating high-frequency whistling sounds, and also avoiding the problem of condensate splashing caused by direct injection orifices.

[0011] In some embodiments, the return wall has an annular structure that matches the exhaust cap.

[0012] The annular reflux wall achieves uniform circumferential stagnation of steam, eliminates local airflow whistling, and significantly improves noise reduction stability.

[0013] In some embodiments, there are multiple vent holes arranged side by side.

[0014] The multi-hole parallel design disperses the steam flow, weakens the impact of a single airflow, and, combined with the effect of the return wall, forms a two-stage noise reduction (countercurrent and flow diversion), thus fully reducing noise.

[0015] In some embodiments, a hinge shaft is provided on one edge of the noise reduction cover, which is rotatably connected to a shaft hole opened on the noise reduction seat.

[0016] This embodiment achieves one-handed opening and closing of the noise reduction cover through the rotating connection design of the hinge shaft and shaft hole. During cleaning or maintenance, the entire new noise reduction structure does not need to be disassembled. The noise reduction cover can be directly flipped upward to fully expose the exhaust cap, thereby improving the efficiency of cleaning and replacing the exhaust cap.

[0017] In some embodiments, the noise reduction seat protrudes outward from the edge of the shaft hole to form a fastening part, and the edge of the noise reduction cover corresponding to the fastening part is provided with a fastening groove that fastens to the fastening part.

[0018] This embodiment uses a mechanical interlocking design between the fastening part and the fastening groove to form a rigid constraint when the noise-reducing lid is closed. It is not easy to come loose even under the impact of high steam pressure, completely eliminating the risk of the lid popping open due to vibration and loosening caused by traditional screw fasteners. Its self-locking structure automatically fastens when the noise-reducing lid is pressed down, and it can only be unlocked by manually lifting it to a specific position, thus ensuring cooking safety from the source.

[0019] In some embodiments, a locking block is formed by a horizontally outward protrusion on the lower edge of the noise reduction seat, which can be inserted into the slot of the pressure cooker lid.

[0020] This embodiment achieves the fixation of the noise reduction base by interlocking the card block and the card slot, allowing for tool-free manual installation. Attached Figure Description

[0021] Figure 1 This is a first-view structural schematic diagram of the novel noise reduction structure of this utility model;

[0022] Figure 2 This is a second-view structural schematic diagram of the novel noise reduction structure of this utility model;

[0023] Figure 3 This is a third-view structural schematic diagram of the novel noise reduction structure of this utility model;

[0024] Figure 4 This is a cross-sectional view of the novel noise reduction structure of this utility model;

[0025] Figure 5 This is an assembly diagram of the novel noise reduction structure behind the default noise reduction cover of this utility model installed on the pressure cooker lid;

[0026] Figure 6 yes Figure 5 A magnified view of part I in the middle;

[0027] Figure 7 This is a cross-sectional view of the novel noise reduction structure of this utility model installed on the pressure cooker lid;

[0028] Figure 8 yes Figure 7 A magnified view of a section II;

[0029] Figure 9 This is a structural diagram of a pressure cooker.

[0030] Figure label:

[0031] 1. Noise-reducing cover; 101. Reflux wall; 102. Exhaust hole; 103. Snap-fit ​​groove; 2. Noise-reducing seat; 201. Shaft hole; 202. Locking block; 204. Snap-fit ​​part; 3. Exhaust cap; 4. Pressure cooker; 401. Locking groove; 5. Exhaust pipe. Detailed Implementation

[0032] 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 specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0033] This utility model provides a novel noise reduction structure for a pressure cooker, comprising: a noise reduction base 2 and a noise reduction cover 1. The noise reduction base 2 is a hollow cylindrical body that runs vertically through the pressure cooker, preferably injection molded from high-temperature resistant engineering plastic (such as PPSU or Nylon 66). Its bottom edge is fixed to the pressure cooker's 4-side cover assembly via a snap-fit ​​structure. The noise reduction cover 1 is hinged to cover the top of the noise reduction base 2, forming a sealed cavity that completely encloses the pressure cooker's 4-side exhaust cap 3 (fitted onto the exhaust pipe 5). Specifically, the top of the noise reduction cover 1 has an exhaust hole 102 for steam discharge, and its inner wall protrudes inward to form a return wall 101 opposite the exhaust cap 3. In this way, the steam is first forced to change its flow direction by the return wall 101 (180° turn back), and this return flow collides with the continuously rising new steam to form a vortex, directly reducing the airflow velocity. The decelerated steam is then discharged outward through the exhaust hole 102, effectively attenuating high-frequency noise.

[0034] Furthermore, the axial direction of the vent hole 102 is strictly perpendicular to the extension direction of the return wall 101. In a preferred embodiment, the vertical arrangement causes the steam jet direction to orthogonally interfere with the vortex motion generated by the return wall 101, meaning the decelerated steam then undergoes a 90° orthogonal turn before exiting through the vertical vent hole 102. This design disperses residual vortices, eliminates high-frequency whistling sounds, and avoids the problem of condensate splashing caused by direct steam injection.

[0035] A predetermined gap is formed between the reflux wall 101 and the vent cap 3 to allow steam flow. Furthermore, the reflux wall 101 is designed as an annular ridge that matches the outer contour of the vent cap 3 of the pressure cooker 4, forming a tightly encircling steam congestion channel. This achieves 360° circumferential noise reduction, eliminates localized airflow dead zones, and improves noise attenuation stability by more than 30%.

[0036] Preferably, multiple exhaust holes 102 are provided and arranged side by side along a straight line. A typical embodiment uses four circular holes of the same diameter, with the spacing between the holes controlled within 1.5 times the diameter. The multi-hole layout disperses the high-pressure steam flow into multiple low-pressure airflows, and combined with the counteracting effect of the return wall 101, forms a two-stage noise reduction mechanism, reducing the impact energy of a single airflow by 60%.

[0037] It is worth noting that the noise reduction cover 1 has a cylindrical hinge shaft integrally formed on one side edge, with a diameter of approximately 3mm. Correspondingly, a U-shaped shaft hole 201 is opened on the side wall of the noise reduction base 2, into which the hinge shaft can be rotatably inserted to form a rotating pair. This design allows the user to flip the noise reduction cover 1 upwards with one hand to fully expose the exhaust cap 3 for cleaning without disassembling the entire device.

[0038] Furthermore, a fastening part 204 is provided on the edge of the noise reduction seat 2 away from the hinge axis. A corresponding elastic fastening groove 103 is provided on the noise reduction cover 1. When the noise reduction cover 1 is pressed down, the fastening groove 103 and the fastening part 204 are mechanically interlocked, and the noise reduction cover 1 must be manually lifted to release the lock. This completely eliminates the possibility of accidental opening caused by steam pressure.

[0039] Specifically, a locking block 202 extends horizontally from the bottom edge of the noise reduction seat 2. The locking block 202 is about 2mm thick and can be pressed into the slot 401 of the pressure cooker 4 lid assembly by hand to achieve radial positioning.

[0040] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A novel noise reduction structure for pressure cookers, applied to the lid of a pressure cooker, characterized in that, include: A noise-reducing seat (2) with openings at both ends and a noise-reducing cover (1) that can be opened and closed is provided above the noise-reducing seat (2). The noise-reducing seat (2) and the noise-reducing cover (1) cover each other to form a receiving cavity covering the steam vent cap (3) of the pressure cooker (4). The noise-reducing cover (1) has a steam vent hole (102). The inner side wall of the noise-reducing cover (1) protrudes towards the receiving cavity corresponding to the position of the steam vent cap (3) to form a reflux wall (101).

2. The novel noise reduction structure according to claim 1, characterized in that, The axial direction of the exhaust port (102) is perpendicular to the extension direction of the return wall (101).

3. The novel noise reduction structure according to claim 1, characterized in that, The return wall (101) has an annular structure that matches the exhaust cap (3).

4. The novel noise reduction structure according to claim 1, characterized in that, The exhaust vents (102) are multiple and arranged side by side.

5. The novel noise reduction structure according to claim 1, characterized in that, A hinge shaft is provided on one side edge of the noise reduction cover (1), which is rotatably connected to the shaft hole (201) opened on the noise reduction seat (2).

6. The novel noise reduction structure according to claim 1, characterized in that, The noise reduction seat (2) has a fastening part (204) protruding outward on the edge of the shaft hole (201) opposite to it. The noise reduction cover (1) has a fastening groove (103) on the edge corresponding to the fastening part (204) that fastens to the fastening part (204).

7. The novel noise reduction structure according to claim 1, characterized in that, The noise reduction seat (2) has a horizontally protruding block (202) on its lower edge that can be inserted into the pressure cooker lid slot (401).

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