Pressure relief cover body structure of electric cooker

Abstract

The utility model relates to a pressure relief cover body structure of an electric cooker. The pressure relief cover body structure comprises a sealing cover plate, a ball cover, a sealing ball and an electromagnet, a first pressure relief hole is formed in the sealing cover plate; the ball cover is arranged on the sealing cover plate to cover the first pressure relief hole; the sealing ball is arranged between the sealing cover plate and the ball cover, and the sealing ball is made of a magnetic material; the electromagnet is arranged on the sealing cover plate and is connected with a power supply and a sensor; wherein during standing, the first pressure relief hole is blocked by the sealing ball. According to the pressure relief cover body structure, the first pressure relief hole is controlled to be opened and closed through magnetic force to exhaust air, physical contact is needed, abrasion of the sealing balls can be remarkably reduced through the driving mode, the service life of the pressure relief cover body structure is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a pressure relief cover structure of an electric rice cooker. Background Art

[0002] When rice is cooked in an electric rice cooker, water evaporates to form steam. In order to safely discharge the steam, the electric rice cooker is provided with an exhaust system.

[0003] When pressure builds inside the rice cooker, the exhaust system switches on. A motor or solenoid valve push rod pushes the seal, displacing it and clearing the exhaust duct for ventilation. This exhaust method requires a push mechanism, which increases the mechanical complexity of the system, making maintenance and repair more difficult and potentially increasing the risk of failure.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Utility Model Content

[0005] In view of the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide an electric cooker pressure relief cover structure, so as to improve the reliability of the electric cooker pressure relief structure.

[0006] The technical solution of the utility model is as follows:

[0007] An electric rice cooker pressure relief cover structure, comprising a sealing cover plate, a ball cover, a sealing ball and an electromagnet;

[0008] A first pressure relief hole is provided on the sealing cover plate;

[0009] The ball cover is arranged on the sealing cover plate to cover the first pressure relief hole; a through hole is opened on the ball cover;

[0010] The sealing ball is arranged between the sealing cover plate and the ball cover, and the sealing ball is made of magnetic material;

[0011] The electromagnet is arranged on the sealing cover plate, and the electromagnet is connected to a power supply and a sensor;

[0012] Among them, when stationary, the sealing ball blocks the first pressure relief hole; when the electromagnet is started, the electromagnet attracts the sealing ball to move, and the first pressure relief hole is unblocked; when the electromagnet is closed, the sealing ball moves under the action of gravity to block the first pressure relief hole.

[0013] Its further technical solution is that a sealing seat is also provided on the sealing cover plate, the sealing seat cover is provided on the first pressure relief hole, an arc groove is provided on the upper surface of the sealing seat, and an air hole is provided on the sealing seat; the air hole connects the arc groove and the first pressure relief hole; the ball cover is provided on the sealing seat, and the sealing ball is provided between the sealing seat and the sealing cover plate.

[0014] A further technical solution is that an extension portion is provided on the upper surface of the sealing seat surrounding the circular arc groove; the extension portion extends to the circular arc inner wall of the circular arc groove.

[0015] A further technical solution is that a step is provided on the sealing seat in a circumferential direction, and a positioning portion is provided on the step; and a slot is provided on the ball cover for the positioning portion to be inserted into.

[0016] Its further technical solution is that it also includes an inner cover, which is arranged on the sealing cover plate and aligned with the sealing cover plate; the side of the inner cover away from the sealing cover plate is the upper surface; the electromagnet is arranged on the upper surface of the inner cover; and a hinged part is provided on the inner cover.

[0017] A further technical solution is that the upper surface of the inner cover is raised, and a pressure relief groove is formed on the lower surface of the inner cover; the ball cover is arranged in the pressure relief groove; and a second pressure relief hole is opened on the pressure relief groove.

[0018] A further technical solution is that the second pressure relief hole is opened vertically; and in the vertical direction, the first pressure relief hole and the second pressure relief hole are staggered.

[0019] A further technical solution is that it also includes a cover plate bracket and a sealing ring; the cover plate bracket is connected to the circumferential outer edge of the sealing cover plate; and the sealing ring is arranged between the cover plate bracket and the sealing cover plate.

[0020] A further technical solution is that a flange is provided on the hole wall of the first pressure relief hole extending upward.

[0021] The beneficial technical effects of the present utility model are as follows:

[0022] (1) The pressure relief cover structure of the rice cooker in the present invention relieves pressure through the first pressure relief hole on the sealing cover plate. A sealing ball and a ball cover are provided on the first pressure relief hole. The sealing ball blocks the first pressure relief hole under the action of its own weight, thereby preventing all the air pressure in the rice cooker from being discharged. In addition, an electromagnet is provided. When the air pressure rises, the sensor is triggered, thereby starting the electromagnet. The electromagnet generates a magnetic force to attract the sealing ball, which is attracted and moved. At this time, the first pressure relief hole is no longer blocked by the sealing ball, and the steam is discharged along the first pressure relief hole, thereby avoiding the danger of excessive air pressure in the rice cooker. The first pressure relief hole is opened and closed by magnetic force to exhaust air without contacting the sealing ball. Since no physical contact is required, this driving method can significantly reduce the wear of the sealing ball, thereby extending the service life and maintenance cost of the pressure relief cover structure. In addition, compared with the contact driving system, the non-contact driving system is quieter and the structure can be designed to be more compact, reducing the volume of the pressure relief cover structure and the noise generated, making it more suitable for use in a home environment.

[0023] (2) Furthermore, an inner cover is provided, and the electromagnet is provided on the upper surface of the inner cover. The inner cover prevents steam from directly contacting the electromagnet and affecting the normal operation of the electromagnet.

[0024] (3) Furthermore, in the vertical direction, the first pressure relief hole and the second pressure relief hole are staggered to prevent the high-temperature steam in the rice cooker from being directly discharged. The steam discharged directly is at a high temperature and may burn the user. By staggering the first pressure relief hole and the second pressure relief hole, the residence time of the steam in the pressure relief groove is prolonged, the temperature of the steam discharged from the rice cooker is reduced, and the risk of steam burns to the user is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The utility model shows a schematic diagram of the three-dimensional structure of the pressure relief cover structure of the electric rice cooker in a state where the sealing cover plate and the inner cover are separated.

[0026] Figure 2 The utility model shows a schematic diagram of the explosion structure of the sealing ball, the sealing seat and the ball cover in the pressure relief cover structure of the electric rice cooker.

[0027] Figure 3 The utility model shows a three-dimensional structural diagram of the sealing cover plate in the pressure relief cover structure of the electric rice cooker.

[0028] In the accompanying drawings:

[0029] 1. Sealing cover; 11. First pressure relief hole; 12. Flanged edge; 2. Cover bracket; 3. Sealing ring; 4. Inner cover; 41. Pressure relief groove; 42. Second pressure relief hole; 43. Hinge; 5. Electromagnet; 6. Sealing ball; 7. Sealing seat; 71. Air hole; 72. Arc groove; 73. Extension; 74. Step; 75. Positioning part; 8. Ball cover; 81. Through hole; 82. Slot. DETAILED DESCRIPTION

[0030] To make the purposes, features, and advantages of this utility model more clearly understood, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in this specification for the understanding and reading of those familiar with this technology. They are not intended to limit the conditions for the implementation of this utility model and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, as long as they do not affect the efficacy and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0031] In the description of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like are defined as indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only used to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0032] Figure 1 The utility model shows a schematic diagram of the three-dimensional structure of the pressure relief cover structure of the electric rice cooker in a state where the sealing cover plate and the inner cover are separated. Figure 2 The utility model shows a schematic diagram of the explosion structure of the sealing ball, the sealing seat and the ball cover in the pressure relief cover structure of the electric rice cooker. Figure 3 The figure shows the three-dimensional structure of the sealing cover in the pressure relief cover structure of the rice cooker of the present invention. Figure 1 、 Figure 2 and Figure 3The rice cooker pressure relief cover structure includes a sealing cover plate 1, a ball bearing cover 8, a sealing ball bearing 6, and an electromagnet 5. A first pressure relief hole 11 is defined in the sealing cover plate 1. When the rice cooker is in operation, the sealing cover plate 1 is positioned on the rice cooker, forming a sealed space within the rice cooker while simultaneously allowing air to escape through the first pressure relief hole 11 to prevent excessive internal pressure. The ball bearing cover 8 is positioned on the sealing cover plate 1 to cover the first pressure relief hole 11 and is provided with a through hole 81. The sealing ball bearing 6 is positioned between the sealing cover plate 1 and the ball bearing cover 8 and is made of a magnetic material. The electromagnet 5 is positioned on the sealing cover plate 1 and is connected to a power supply and a sensor. The sensor can be a commercially available MS5611 air pressure sensor. When the internal air pressure of the rice cooker exceeds a threshold set by the sensor, the sensor transmits a signal to the electromagnet 5, causing it to generate a magnetic force. When the rice cooker is at rest, the sealing ball bearing 6 blocks the first pressure relief hole 11. The electromagnet 5 is started, and the electromagnet 5 attracts the sealing ball 6 to move, and the first pressure relief hole 11 is unblocked. When the electromagnet 5 is turned off, the sealing ball 6 moves under the action of gravity to block the first pressure relief hole 11. The first pressure relief hole 11 is opened and closed by magnetic force to exhaust air without contacting the sealing ball 6. Since no physical contact is required, this driving method can significantly reduce the wear of the sealing ball 6, thereby extending the service life and maintenance cost of the pressure relief cover structure. In addition, compared with the contact drive system, the non-contact drive system is quieter, and the structure can be designed to be more compact, reducing the volume of the pressure relief cover structure and the noise generated, and is more suitable for use in a home environment.

[0033] Please refer to Figure 2 and Figure 3 , a sealing seat 7 is also provided on the sealing cover plate 1. The sealing seat 7 is covered on the first pressure relief hole 11. An arc groove 72 is provided on the upper surface of the sealing seat 7, and an air hole 71 is provided on the sealing seat 7. The air hole 71 connects the arc groove 72 and the first pressure relief hole 11. The ball cover 8 is covered on the sealing seat 7, and the sealing ball 6 is provided between the sealing seat 7 and the sealing cover plate 1. When the sealing ball 6 is provided in the arc groove 72, as long as the sealing ball 6 is not at the lowest point of the arc groove 72, the arc-shaped inner wall of the arc groove 72 cannot stably support the sealing ball 6. Under the action of gravity, the sealing ball 6 that is not at the lowest point of the arc groove 72 will roll along the arc-shaped inner wall of the arc groove 72 to the lowest point of the arc groove 72. This makes the sealing ball 6 in the arc groove 72 always located at the bottom of the arc groove 72 and blocks the air hole 71.

[0034] Preferably, an extension portion 73 is provided on the upper surface of the sealing seat 7, surrounding the arc groove 72. The extension portion 73 extends to the inner wall of the arc groove 72. This allows the sealing ball 6 in the arc groove 72 to be blocked by the extension portion 73 when it is about to slide out of the arc groove 72, thereby confining the sealing ball 6 in the arc groove 72. Furthermore, gaps exist between adjacent extension portions 73, allowing steam discharged from the air hole 71 to be discharged through these gaps.

[0035] More preferably, the upper surface of the extension 73 is an inclined surface, and the side of the upper surface of the extension 73 close to the arc groove 72 is low. Even if the sealing ball 6 moves to the top of the extension 73, the sealing ball 6 will slide back into the arc groove 72 along the upper surface of the extension 73.

[0036] Further preferably, a step 74 is provided extending circumferentially from the sealing seat 7. When the ball cage 8 is placed on the sealing seat 7, the step 74 supports the ball cage 8. The step 74 allows for quick positioning of the ball cage 8 in both the vertical and horizontal directions. Furthermore, a positioning portion 75 extends from the step 74, and a slot 82 is provided on the ball cage 8 for the positioning portion 75 to engage. The cooperation between the positioning portion 75 and the slot 82 restricts the rotation of the ball cage 8 relative to the sealing seat 7. The combined action of the step 74 and the positioning portion 75 positions and restricts the positional relationship between the ball cage 8 and the sealing seat 7.

[0037] Please refer to Figure 1 and Figure 2 The rice cooker further includes an inner cover 4, which is mounted on the sealing cover plate 1 and aligned with the sealing cover plate 1. The side of the inner cover 4 facing away from the sealing cover plate 1 is the upper surface, and the electromagnet 5 is mounted on the upper surface of the inner cover 4. The inner cover 4 completely isolates the electromagnet 5 from steam, preventing direct steam contact with the electromagnet 5 and shortening its service life. The inner cover 4 is provided with a hinge 43, through which the pressure relief cover structure of the rice cooker is connected to the main body of the rice cooker.

[0038] Preferably, the upper surface of the inner cover 4 is raised, and a pressure relief groove 41 is formed on the lower surface of the inner cover 4, and a second pressure relief hole 42 is provided on the pressure relief groove 41. The ball cover 8 is arranged in the pressure relief groove 41. The pressure relief groove 41 is provided so that the distance between the inner cover 4 and the sealing cover plate 1 can be set smaller, thereby reducing the installation height of the electromagnet 5 provided on the inner cover 4 and streamlining the volume of the entire electric rice cooker pressure relief cover structure. At the same time, the electromagnet 5 is provided on the horizontal side of the sealing ball 6, and the electromagnet 5 laterally attracts the sealing ball 6 to move. When the sealing ball 6 moves, the sealing seat 7 provides support force to the sealing ball 6, and the electromagnet 5 only needs to partially overcome the gravity of the sealing ball 6 to drive the sealing ball 6 to move, and the required electromagnetic force is relatively small.

[0039] More preferably, the second pressure relief hole 42 is vertically disposed. Vertically, the first pressure relief hole 11 and the second pressure relief hole 42 are staggered to prevent the direct discharge of high-temperature steam from the rice cooker. Directly discharged steam is hot and could scald the user. By staggering the first pressure relief hole 11 and the second pressure relief hole 42, the steam's residence time within the pressure relief groove 41 is prolonged, the temperature of the steam discharged from the rice cooker is lowered, and the risk of steam burns is reduced.

[0040] Please refer to Figure 1 、 Figure 2and Figure 3 , further comprising a cover plate bracket 2 and a sealing ring 3. The cover plate bracket 2 is connected to the circumferential outer edge of the sealing cover plate 1. The sealing ring 3 is disposed between the cover plate bracket 2 and the sealing cover plate 1. When the sealing cover plate 1 is subsequently installed on the rice cooker body, the sealing ring 3 is simultaneously disposed between the sealing cover plate 1 and the rice cooker body, thereby improving the sealing performance between the sealing cover plate 1 and the rice cooker body.

[0041] Preferably, the surface of the sealing ball 6 is smooth to facilitate the sliding of the sealing ball 6 in the arc groove 72 .

[0042] More preferably, the hole wall of the first pressure relief hole 11 extends upwards to be provided with a flange 12. The sealing seat 7 may be provided with a groove to match the flange 12 to quickly locate the position of the sealing seat 7 on the sealing cover plate 1.

[0043] The specific workflow of this utility model is as follows:

[0044] When the electric rice cooker is working, steam is generated inside the electric rice cooker. At this time, the sealing ball 6 is located at the bottom of the arc groove 72, and the sealing ball 6 blocks the air hole 71, so the electric rice cooker cannot exhaust. As the air pressure inside the electric rice cooker rises to the trigger threshold set by the sensor, the sensor activates the electromagnet 5 to generate a magnetic force to attract the sealing ball 6. Under the attraction of the magnetic force, the sealing ball 6 slides along the arc groove 72, and the air hole 71 is no longer blocked by the sealing ball 6. The steam inside the electric rice cooker flows and is discharged in sequence along the first pressure relief hole 11, the air hole 71, the through hole 81 and the second pressure relief hole 42. Until the air pressure inside the electric rice cooker is lower than the trigger threshold set by the sensor, the electromagnet 5 no longer generates magnetic force. After the sealing ball 6 loses its magnetic attraction, it moves to the bottom of the arc groove 72 under the action of gravity, and the sealing ball 6 blocks the air hole 71, and the electric rice cooker no longer exhausts.

[0045] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person of ordinary skill in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. The pressure relief cover structure of the rice cooker is characterized in that: The pressure relief cover structure of the electric rice cooker comprises a sealing cover plate, a ball cover, a sealing ball and an electromagnet; A first pressure relief hole is provided on the sealing cover plate; The ball cover is arranged on the sealing cover plate to cover the first pressure relief hole; a through hole is opened on the ball cover; The sealing ball is arranged between the sealing cover plate and the ball cover, and the sealing ball is made of magnetic material; The electromagnet is arranged on the sealing cover plate, and the electromagnet is connected to a power supply and a sensor; Among them, when stationary, the sealing ball blocks the first pressure relief hole; when the electromagnet is started, the electromagnet attracts the sealing ball to move, and the first pressure relief hole is unblocked; when the electromagnet is closed, the sealing ball moves under the action of gravity to block the first pressure relief hole.

2. The pressure relief cover structure for an electric rice cooker according to claim 1, wherein: A sealing seat is also provided on the sealing cover plate, and the sealing seat cover is provided on the first pressure relief hole. An arc groove is provided on the upper surface of the sealing seat, and an air hole is provided on the sealing seat; the air hole connects the arc groove and the first pressure relief hole; the ball cover is provided on the sealing seat, and the sealing ball is provided between the sealing seat and the sealing cover plate.

3. The pressure relief cover structure of the rice cooker according to claim 2, wherein: An extension portion is provided on the upper surface of the sealing seat surrounding the arc groove; the extension portion extends to the arc inner wall of the arc groove.

4. The pressure relief cover structure for an electric rice cooker according to claim 2, wherein: The sealing seat is provided with a step extending in the circumferential direction, and a positioning portion is extended on the step; and a slot is provided on the ball cover for the positioning portion to be inserted into.

5. The pressure relief cover structure for an electric rice cooker according to claim 1, wherein: It also includes an inner cover, which is arranged on the sealing cover plate and aligned with the sealing cover plate; the side of the inner cover away from the sealing cover plate is the upper surface; the electromagnet is arranged on the upper surface of the inner cover; and a hinge part is provided on the inner cover.

6. The pressure relief cover structure for an electric rice cooker according to claim 5, wherein: The upper surface of the inner cover is raised, and a pressure relief groove is formed on the lower surface of the inner cover; the ball cover is arranged in the pressure relief groove; and a second pressure relief hole is opened on the pressure relief groove.

7. The pressure relief cover structure for an electric rice cooker according to claim 6, wherein: The second pressure relief hole is vertically opened; in the vertical direction, the first pressure relief hole and the second pressure relief hole are staggered.

8. The pressure relief cover structure for an electric rice cooker according to claim 1, wherein: It also includes a cover plate bracket and a sealing ring; the cover plate bracket is connected to the circumferential outer edge of the sealing cover plate; and the sealing ring is arranged between the cover plate bracket and the sealing cover plate.

9. The pressure relief cover structure for an electric rice cooker according to claim 1, wherein: The hole wall of the first pressure relief hole is provided with a flange extending upward.

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