CN108244998B - Electric pressure cooker - Google Patents

Abstract

The invention provides an electric pressure cooker, which includes: a pot body (10), which is used to hold food to be cooked; a heating device is provided in the pot body (10); and a pot cover (20), which is provided on the pot body (10). The pot cover (20) includes an upper cover and an inner cover (22). The inner cover (22) is provided with a movable pressure limiting valve (30), and the upper cover is provided with a valve for driving the pressure limiting valve (30) to open. When the inner cover (22) is assembled to the upper cover of the driving device (40), the pressure limiting valve (30) sinks due to gravity to avoid the driving ejector rod (41) of the driving device (40). The technical solution of the present invention can effectively solve the problem in the prior art that the ejector pin of the driving device easily interferes with the pressure limiting valve when the pot lid is assembled.

Description

Electric pressure cooker

Technical field

The present invention relates to electric pressure cookers, and in particular to improvements in pressure limiting valves and driving devices of electric pressure cookers.

Background technique

With the improvement of people's living standards, electric pressure cookers, as an alternative to traditional pressure cookers, have been increasingly widely used and loved by consumers. In the prior art, as shown in Figure 1, the lid of an electric pressure cooker includes an inner lining and an inner cover. The inner cover is provided with a pressure limiting valve 1, and the inner lining is provided with a driving device 2 that drives the pressure limiting valve 1 to open. The distance between the push rod 3 of the device 2 and the rear end of the pot lid is smaller than the distance between the driving piece 4 of the pressure limiting valve 1 and the rear end of the pot lid. During the assembly process of the pot lid, the pot lid is in an open state, and the push rod 3 of the driving device 2 is always extended. When the inner cover is assembled to the lining, the driving piece 4 is located above the ejector pin 3, which causes the ejector pin 3 to easily interfere with the pressure limiting valve 1 and the driving piece 4 and get stuck, causing the pressure limiting valve 1 to not reset, causing the Pressure cookers are prone to air leakage and slurry overflow when in working condition.

Contents of the invention

The main purpose of the present invention is to provide an electric pressure cooker to solve the problem in the prior art that the ejector pin of the driving device easily interferes with the pressure limiting valve when the pot lid is assembled.

In order to achieve the above object, the present invention provides an electric pressure cooker, which includes: a pot body, used for holding food to be cooked; a heating device is provided in the pot body; a pot lid, which is provided on the pot body; the pot lid includes an upper cover and a The inner cover is provided with a movable pressure limiting valve, and the upper cover is provided with a driving device for driving the pressure limiting valve to open. When the inner cover is assembled to the upper cover, the pressure limiting valve sinks due to gravity to avoid The drive ejector of the drive unit.

Applying the technical solution of the present invention, the inner cover is provided with a movable pressure limiting valve, and the upper cover is provided with a driving device for driving the pressure limiting valve to open. When the inner cover needs to be assembled to the upper cover, the upper cover is in an open state, and at this time, the driving ejector rod of the driving device extends. During the above assembly process, the pressure limiting valve sinks due to gravity, so that the pressure limiting valve cannot contact the driving ejector during the entire assembly process to avoid the driving ejector of the driving device, thereby preventing the driving ejector from interfering with the pressure limiting valve. die. When the inner cover is assembled and the pot lid is closed, the driving ejector rod retracts, and there is a gap between the driving ejector rod and the pressure limiting valve. The above structure facilitates the assembly of the inner cover and the upper cover, and prevents the driving ejector rod from interfering with the pressure limiting valve during the assembly process, thereby preventing the pressure limiting valve from not resetting and leaking air and slurry under working conditions.

Further, the distance from the center of the pressure limiting valve to the rear end of the pot lid is smaller than the distance from the center of the driving device to the rear end of the pot lid, so that the driving device avoids the outer edge of the pot lid and is assembled on the pot lid.

Further, the circumferential outer surface of the pressure limiting valve is provided with a driving piece that matches the driving ejector rod. When the inner cover is assembled to the upper cover, the driving piece is located below the driving ejector rod.

Further, when the inner cover is assembled to the upper cover, the driving device is located above the side of the pressure limiting valve.

Further, an inclined portion is provided on the circumferential outer surface of the pressure limiting valve, and an escape recessed portion that is concave along the extension direction of the driving ejector rod is formed between the driving piece and the inclined portion.

Further, the upper part of the pressure limiting valve is a frustum, and the circumferential outer surface of the frustum forms an inclined portion.

Further, the frustum includes a first frustum and a second frustum connected in sequence from top to bottom. The angle between the rotational generatrix of the first frustum and the axial direction of the pressure limiting valve is greater than the angle between the rotational generatrix of the second frustum and the axial direction of the pressure limiting valve. The angle between the axis directions of the pressure limiting valve.

Further, the driving piece extends along the radial direction of the pressure limiting valve.

Further, the upper cover includes a surface cover and an inner lining arranged in sequence from top to bottom. The driving device is arranged on the inner lining. The inner lining is provided with a mounting hole for inserting the pressure limiting valve. When the inner cover is assembled to the inner lining When the pressure limiting valve is inserted into the lining through the installation hole.

Further, a pressure-limiting valve seat is provided on the upper cover. When the inner cover is assembled to the upper cover, the pressure-limiting valve is installed on the pressure-limiting valve seat. A limiting notch is provided on the circumferential side wall of the pressure-limiting valve seat, and the driving piece Located within the limit gap.

Description of the drawings

The description and drawings that constitute a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 shows a schematic structural diagram of the pressure limiting valve and driving device of an electric pressure cooker in the prior art;

Figure 2 shows a schematic structural diagram of Embodiment 1 of the electric pressure cooker according to the present invention;

Figure 3 shows a schematic cross-sectional view of the electric pressure cooker of Figure 2;

Figure 4 shows a schematic diagram of the exploded structure of the electric pressure cooker of Figure 2 before assembly;

Figure 5 shows an enlarged schematic view of position A of the inner cover of the electric pressure cooker of Figure 4;

Figure 6 shows a schematic structural view of the electric pressure cooker of Figure 2 after assembly;

Figure 7 shows an enlarged schematic view of B of the electric pressure cooker of Figure 6;

Figure 8 shows a schematic structural diagram of the inner cover, pressure limiting valve and driving device of the electric pressure cooker of Figure 6;

Figure 9 shows a schematic three-dimensional structural diagram of the electric pressure cooker of Figure 2;

Figure 10 shows a schematic structural diagram of the inner cover, pressure limiting valve and driving device of the second embodiment of the electric pressure cooker according to the present invention; and

FIG. 11 shows an enlarged schematic view of C of the electric pressure cooker in FIG. 10 .

Among them, the above-mentioned drawings include the following reference signs:

1. Pressure limiting valve; 2. Driving device; 3. Ejector; 4. Driving piece; 10. Pot body; 20. Pot lid; 21. Lining; 22. Inner cover; 23. Installation hole; 24. Pressure limiting Valve seat; 241, limit gap; 30, pressure limiting valve; 31, drive piece; 32, frustum; 321, first frustum; 322, second frustum; 40, drive device; 41, drive ejector.

Detailed ways

It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular forms are also intended to include the plural forms unless the context clearly indicates otherwise. Furthermore, it will be understood that when the terms "comprises" and/or "includes" are used in this specification, they indicate There are features, steps, operations, means, components and/or combinations thereof.

The relative arrangement of components and steps, numerical expressions, and numerical values set forth in these examples do not limit the scope of the invention unless specifically stated otherwise. At the same time, it should be understood that, for convenience of description, the dimensions of various parts shown in the drawings are not drawn according to actual proportional relationships. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the authorized specification. In all examples shown and discussed herein, any specific values are to be construed as illustrative only and not as limiting. Accordingly, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters refer to similar items in the following figures, so that once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the description of the present invention, it should be understood that the orientation indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, vertical, horizontal" and "top, bottom" etc. Or the positional relationship is usually based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description. Without explanation to the contrary, these directional words do not indicate and imply the referred devices or components. It must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the scope of the present invention; the orientation words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

For the convenience of description, spatially relative terms can be used here, such as "on...", "on...", "on the upper surface of...", "above", etc., to describe what is shown in the figure. The spatial relationship between one device or feature and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a feature in the figure is turned upside down, then one feature described as "above" or "on top of" other features or features would then be oriented "below" or "below" the other features or features. under other devices or structures". Thus, the exemplary term "over" may include both orientations "above" and "below." The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define parts is only to facilitate the distinction between corresponding parts. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood. To limit the scope of protection of the present invention.

As shown in FIGS. 2 to 9 , the electric pressure cooker of Embodiment 1 includes a pot body 10 and a pot lid 20 . The pot body 10 is used to hold the food to be cooked, and a heating device is provided in the pot body 10 . The pot cover 20 is located on the pot body 10 . The pot cover 20 includes an upper cover and an inner cover 22 . The inner cover 22 is provided with a pressure limiting valve 30 that is detachable and movable after assembly. The upper cover is provided with a driving device 40 for driving the pressure limiting valve 30 to open. When the inner cover 22 is assembled to the upper cover, the pressure limiting valve 30 sinks (entirely sinks or tilts) due to gravity to avoid the driving push rod 41 of the driving device 40 .

In the electric pressure cooker of this embodiment, a movable pressure limiting valve 30 is provided on the inner cover 22, and a driving device 40 for driving the pressure limiting valve 30 to open is provided on the upper cover. When the inner cover 22 needs to be assembled to the upper cover, the upper cover is in an open state. A connecting rod structure is connected to the handle mounting portion in the middle of the upper cover, and one end of the connecting rod structure away from the handle mounting portion is matched with the rear end of the driving ejector rod 41 of the driving device 40 . When the upper cover is in an open state, the handle mounting portion pushes the driving ejector rod 41 forward through the connecting rod structure, and the driving ejector rod 41 of the driving device 40 extends. During the above assembly process, the pressure limiting valve 30 sinks (entirely sinks or tilts) due to gravity, so that the pressure limiting valve 30 cannot contact the driving ejector 41 during the entire assembly process to avoid the driving ejector 41 of the driving device 40. This prevents the driving ejector 41 from interfering with the pressure limiting valve 30 and getting stuck. When the inner cover 22 is assembled and the pot lid 20 is closed, the driving ejector pin 41 retracts under the action of the return spring provided at the rear end, and there is a gap between the driving ejector pin 41 and the pressure limiting valve 30 . The above structure facilitates the assembly of the inner cover and the upper cover, and prevents the driving ejector rod from interfering with the pressure limiting valve during the assembly process, thereby preventing the pressure limiting valve from not resetting and leaking air and slurry under working conditions.

As shown in FIGS. 6 to 8 , in the electric pressure cooker of Embodiment 1, the distance from the center of the pressure limiting valve 30 to the rear end of the pot lid 20 is smaller than the distance from the center of the driving device 40 to the rear end of the pot lid 20 . That is to say, when the inner cover 22 is assembled to the upper cover, the upper cover is in an open state, the center of the driving device 40 is above the center of the pressure limiting valve 30, and the pressure limiting valve 30 will sink due to gravity (the overall sinking or tilted), this can make the pressure limiting valve 30 move in the direction away from the driving device 40, so that the pressure limiting valve 30 cannot contact the driving ejector 41 during the entire assembly process, thereby avoiding the driving ejector 41 of the driving device 40, thereby preventing The driving ejector 41 interferes with the pressure limiting valve 30 and gets stuck. When the inner cover 22 is assembled and the pot lid 20 is closed, the pressure limiting valve 30 is reset, and the driving ejector 41 is retracted under the action of the return spring provided at the rear end. There is a gap between the driving ejector 41 and the pressure limiting valve 30 . In addition, considering the limited assembly space on the pot cover 20, the center of the driving device 40 is set above the center of the pressure limiting valve 30, so that the installation position of the driving device 40 can be moved upward, so that the driving device 40 can avoid the pot. The outer edge of the cover 20 is assembled to the pot lid 20, which makes it easier to assemble and arrange the driving device 40 and rationally utilize the assembly space of the pot lid 20.

It should be noted that in this embodiment, the driving device 40 is a solenoid valve, and the center of the driving device 40 is above the center of the pressure limiting valve 30. The pressure limiting valve 30 sinks due to gravity to avoid being driven by the driving device 40. Push rod 41. Of course, the positional relationship between the driving device 40 and the pressure limiting valve 30 is not limited to this. In other embodiments not shown in the figure, the driving device may be located below the pressure limiting valve (from the center of the pressure limiting valve to the rear of the pot lid). The distance from the end of the pressure limiting valve to the rear end of the pot cover is greater than the distance from the center of the driving device to the rear end of the pot lid). The pressure limiting valve is provided with an avoidance recess at the matching position of the driving ejector rod of the driving device. When the inner cover is assembled to the upper cover, the pressure limiting valve is Gravity sinks so that the front end of the driving ejector pin is placed exactly in the above-mentioned avoidance recessed part. That is to say, the above-mentioned avoidance recessed part can avoid the front end of the driving ejector pin, thereby preventing the driving ejector pin from interfering with the pressure limiting valve. In addition, the driving device can also be set flush with the pressure limiting valve (the distance from the center of the pressure limiting valve to the rear end of the pot cover is equal to the distance from the center of the driving device to the rear end of the pot lid), as long as the pressure limiting valve sinks due to gravity. It is enough to avoid the driving ejector pin of the driving device.

As shown in FIGS. 4 to 8 , in the electric pressure cooker of Embodiment 1, the circumferential outer surface of the pressure limiting valve 30 is provided with a driving piece 31 that matches the driving push rod 41 . When the inner cover 22 is assembled to the upper cover, the upper cover is in an open state, and the driving piece 31 is located below the driving ejector rod 41 . The pressure limiting valve 30 will sink due to gravity, so that the driving piece 31 can move in the direction away from the driving device 40 (in the direction shown by the arrow in Figure 4), so that the driving piece 31 cannot contact the driving ejector 41 during the entire assembly process. Therefore, the driving ejector pin 41 of the driving device 40 is avoided, thereby preventing the driving ejector pin 41 from interfering with the pressure limiting valve 30 and getting stuck. When the inner cover 22 is assembled and the pot lid 20 is closed, the pressure limiting valve 30 is reset, and the driving ejector pin 41 is retracted under the action of the return spring provided at the rear end. There is a gap between the driving ejector pin 41 and the driving piece 31 . The above structure allows the driving ejector pin 41 to cooperate with the driving piece 31 during normal operation. The front end of the driving ejector rod 41 cooperates with the driving piece 31 to drive the pressure limiting valve 30 to open and exhaust, making the driving more stable and reliable.

As shown in Figures 4 to 8, in the electric pressure cooker of Embodiment 1, when the inner cover 22 is assembled to the upper cover, the upper cover is in an open state, and the driving device 40 is located above the pressure limiting valve 30. Specifically, The driving device 40 is located above the right side of the pressure limiting valve 30 . The above structure makes it easier to arrange the driving device 40 and the pressure limiting valve 30 on the pot lid 20, making the structure of the pot lid 20 more compact.

As shown in FIGS. 5 and 7 , in the electric pressure cooker of Embodiment 1, an inclined portion is provided on the circumferential outer surface of the pressure limiting valve 30 . An escape recessed portion that is concave along the extending direction of the driving ejector pin 41 is formed between the driving piece 31 and the inclined portion. When the inner cover 22 is assembled to the upper cover, the pressure limiting valve 30 sinks due to gravity, and the above-mentioned avoidance recess can increase the distance between the front end of the driving ejector 41 and the pressure limiting valve 30, further preventing the driving ejector 41 from colliding with the pressure limiting valve 30. The pressure limiting valve 30 and/or the driving piece 31 are jammed due to interference. When the inner cover 22 is assembled and the pot lid 20 is closed, the driving ejector rod 41 cooperates with the driving piece 31, and the front end of the driving ejector rod 41 cooperates with the driving piece 31 to drive the pressure limiting valve 30 to open the exhaust, and the drive is more Stable and reliable.

As shown in FIG. 5 , in the electric pressure cooker of Embodiment 1, the upper part of the pressure limiting valve 30 is a frustum 32 . The circumferential outer surface of the frustum 32 forms an inclined portion. The space formed between the driving piece 31 and the inclined portion (the circumferential outer surface of the frustum 32) is larger to avoid the recessed portion. The installation position of the inclined portion formed by the above-mentioned frustum 32 can be more suitable for the actual assembly environment, the avoidance effect is better, and the frustum 32 is easier to process. Of course, the specific form of the inclined portion is not limited to this. In other embodiments not shown in the figure, the inclined portion can be other inclined structures. For example, the inclined portion can be an inclined portion formed on the circumferential outer surface of the pressure limiting valve. section.

As shown in Figure 5, in the electric pressure cooker of Embodiment 1, the frustum 32 includes a first frustum 321 and a second frustum 322 connected in sequence from top to bottom. The angle between the generatrix of rotation of the first frustum 321 and the axial direction of the pressure limiting valve 30 is greater than the angle between the generatrix of rotation of the second frustum 322 and the axial direction of the pressure limiting valve 30 . The circumferential outer surface of the above-mentioned first frustum 321 serves as an intermediate transition, thereby preventing the outer surface of the pressure limiting valve 30 from having a sharp edge when the angle is too different, thereby preventing the front end of the driving ejector 41 from interfering with the sharp edge.

As shown in FIGS. 7 and 8 , in the electric pressure cooker of the first embodiment, the driving piece 31 extends along the radial direction of the pressure limiting valve 30 . The installation position of the above-mentioned driving piece 31 can better cooperate with the driving ejector pin 41 . Of course, the arrangement of the driving piece 31 is not limited to this. In other embodiments not shown in the figure, the driving piece can be at any angle with the radial direction of the pressure limiting valve. In addition, the structure of the driving piece 31 is not limited to this. In other embodiments not shown in the figure, the driving piece may include a first driving piece and a second driving piece connected at an angle, and the first driving piece is connected to the pressure limiting valve. , an avoidance recess is formed between the first driving piece and the inclined part. When the inner cover is assembled and the pot cover is closed, the driving ejector pin matches the second driving piece.

As shown in FIGS. 2 to 9 , in the electric pressure cooker of Embodiment 1, the upper cover includes a surface cover and an inner lining 21 arranged in sequence from top to bottom. The drive device 40 is provided on the lining 21 . The inner lining 21 is provided with a mounting hole 23 for inserting the pressure limiting valve 30 . When the inner cover 22 is assembled onto the lining 21 , the pressure limiting valve 30 penetrates to the lining 21 through the mounting hole 23 . In this embodiment, a pressure-limiting valve seat 24 is provided on the lining 21 . When the inner cover 22 is assembled to the upper cover, the pressure limiting valve 30 is installed on the pressure limiting valve seat 24 . A limiting notch 241 is provided on the circumferential side wall of the pressure limiting valve seat 24 . The driving piece 31 is located in the limiting notch 241 . The above-mentioned limiting notch 241 can limit the moving range of the driving piece 31, ensuring the working reliability and stability of the pressure limiting valve 30.

As shown in Figures 10 and 11, the main difference between the electric pressure cooker of Embodiment 2 and Embodiment 1 is that when the inner cover 22 is assembled to the upper cover, the upper cover is in an open state, and the driving device 40 is located at the pressure limiting valve 30. Above the side, specifically, the driving device 40 is located above the left side of the pressure limiting valve 30 . It should be noted that the specific position of the driving device 40 can be selected as needed.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (9)

1. An electric pressure cooker, comprising:

the cooker comprises a cooker body (10) for containing food to be cooked, wherein a heating device is arranged in the cooker body (10);

the pot cover (20) is covered on the pot body (10), the pot cover (20) comprises an upper cover and an inner cover (22), a movable pressure limiting valve (30) is arranged on the inner cover (22), a driving device (40) for driving the pressure limiting valve (30) to open is arranged on the upper cover, and when the inner cover (22) is assembled on the upper cover, the pressure limiting valve (30) is sunk under the gravity to avoid a driving ejector rod (41) of the driving device (40);

the distance from the center of the pressure limiting valve (30) to the rear end of the pot cover (20) is smaller than the distance from the center of the driving device (40) to the rear end of the pot cover (20), so that the driving device (40) avoids the outer edge of the pot cover (20) and is assembled on the pot cover (20).

2. An electric pressure cooker according to claim 1, characterized in that a driving piece (31) cooperating with the driving ram (41) is provided on the circumferential outer surface of the pressure limiting valve (30), the driving piece (31) being located below the driving ram (41) when the inner lid (22) is fitted onto the upper lid.

3. Electric pressure cooker according to claim 1 or 2, characterized in that the drive means (40) are located above the side of the pressure limiting valve (30) when the inner cover (22) is fitted onto the upper cover.

4. Electric pressure cooker according to claim 2, characterized in that an inclined portion is provided on the circumferential outer surface of the pressure limiting valve (30), and a relief recess recessed in the protruding direction of the drive ram (41) is formed between the drive piece (31) and the inclined portion.

5. The electric pressure cooker according to claim 4, characterized in that an upper portion of the pressure limiting valve (30) is a frustum (32), and a circumferential outer surface of the frustum (32) forms the inclined portion.

6. The electric pressure cooker according to claim 5, characterized in that the frustum (32) comprises a first frustum (321) and a second frustum (322) which are connected in sequence from top to bottom, the angle between the swivel generatrix of the first frustum (321) and the axial direction of the pressure limiting valve (30) being greater than the angle between the swivel generatrix of the second frustum (322) and the axial direction of the pressure limiting valve (30).

7. An electric pressure cooker according to claim 2, characterized in that the driving plate (31) is arranged extending in the radial direction of the pressure limiting valve (30).

8. The electric pressure cooker according to claim 1, characterized in that the upper cover comprises a face cover and a liner (21) which are sequentially arranged from top to bottom, the driving device (40) is arranged on the liner (21), a mounting hole (23) for penetrating the pressure limiting valve (30) is arranged on the liner (21), and when the inner cover (22) is assembled on the liner (21), the pressure limiting valve (30) penetrates onto the liner (21) through the mounting hole (23).

9. An electric pressure cooker as claimed in claim 2, characterized in that the upper cover is provided with a pressure limiting valve seat (24), the pressure limiting valve (30) being mounted to the pressure limiting valve seat (24) when the inner cover (22) is assembled to the upper cover, a limit gap (241) being provided on a circumferential side wall of the pressure limiting valve seat (24), the driving piece (31) being located in the limit gap (241).