Pressure Cooker

Abstract

The present application provides a pressure cooker. The pressure cooker includes a pot body and a pot cover. A cooking space for accommodating food materials is formed in the pot body, and the pot cover is arranged above the pot body. The pot cover includes an upper cover, an inner cover and a driving mechanism. The upper cover can be installed on the pot body, and the inner cover can be movably installed at the bottom of the upper cover, and is used to cooperate with the pot body to achieve the sealing of the cooking space. The driving mechanism is drivingly connected to the inner cover, and the driving mechanism includes a first state of driving the inner cover to be pressed down to a first position, and a second state of driving the inner cover to rise to a second position. The volume of the cooking space when the inner cover is in the second position is larger than the cooking space when the inner cover is in the first position. Compared with the methods of accelerating pressure relief such as water cooling and adding an exhaust valve, the method of immediately increasing the volume of the cooking space when the pressure is relieved will make the pressure reduction in the cooking space more direct.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, in particular to a pressure cooker. Background Art

[0002] Pressure cookers such as electric pressure cookers generally have the advantages of high cooking temperature and fast cooking speed, but after heating is completed, the electric pressure cooker needs to go through a long exhaust and pressure release process before the lid can be opened.

[0003] At present, electric pressure cookers mainly achieve rapid pressure relief by improving the exhaust structure and reducing temperature and pressure. The cooling and pressure reduction method uses the proportional relationship between temperature and pressure to reduce the pressure in the pot by reducing the temperature in the pot. There is a product on the market that uses the cooling and pressure reduction principle and mainly uses water cooling or increases the exhaust volume. For example, patent CN203493395U sets a water storage tank inside the pot cover. The user adds water to the water tank before or after cooking, and uses the cooling water to take away the heat in the pot and reduce the temperature in the pot, so as to achieve the purpose of quickly reducing the pressure. The water storage tank and cooling structure are set in the pot, which increases the mass of the pot body and has a complex structure. In addition, there is also an improved exhaust valve structure, which is to increase the valve aperture as much as possible to increase the exhaust volume to shorten the exhaust time while ensuring safety. For example, patent CN201595666 increases the number of exhaust valves to increase the exhaust volume during pressure relief to achieve the purpose of rapid pressure relief. Setting two exhaust valves on the pot cover makes the appearance of the pot cover complex and unsightly.

[0004] As mentioned above, the existing electric pressure cooker still has the above-mentioned shortcomings in terms of rapid pressure release, resulting in inconvenience in use. Summary of the invention

[0005] The embodiment of the present invention provides a pressure cooker to solve the technical problem that the pressure cooker in the prior art is inconvenient to use in terms of rapid pressure release.

[0006] An embodiment of the present application provides a pressure cooker, comprising: a pot body, a cooking space for accommodating food materials formed therein; a pot cover, arranged above the pot body, the pot cover comprising: an upper cover, which can be openably mounted on the pot body; an inner cover, which can be movably mounted on the bottom of the upper cover and is used to cooperate with the pot body to achieve sealing of the cooking space; a driving mechanism, which is drivingly connected to the inner cover, the driving mechanism comprising a first state of driving the inner cover to be pressed down to a first position, and a second state of driving the inner cover to be raised to a second position, the volume of the cooking space when the inner cover is in the second position is larger than the cooking space when the inner cover is in the first position.

[0007] In one embodiment, the pressure cooker further comprises a controller, which is connected to the driving mechanism and is used to control the operation of the driving mechanism. During cooking, the controller controls the driving mechanism to operate to a first state, and during pressure relief, the controller controls the driving mechanism to operate to a second state.

[0008] In one embodiment, the pressure cooker further comprises an exhaust valve, which is mounted on the upper cover and is used to connect the cooking space with the outside.

[0009] In one embodiment, the pot cover comprises a sealing member, which is mounted on the inner cover and is used to seal a gap between the inner cover and the pot body.

[0010] In one embodiment, a seal is connected between the inner cover and the upper cover.

[0011] In one embodiment, the pot cover further includes a handle, which is disposed on the top of the upper cover.

[0012] In one embodiment, the pot body includes a base and an inner pot installed in the base, and a cooking space is formed in the inner pot.

[0013] In one embodiment, the pressure cooker is an electric pressure cooker, and the pressure cooker further comprises an electric heating element, which is installed on the base and is used to heat the inner pot.

[0014] In one embodiment, the opening of the inner container is a flared structure.

[0015] In one embodiment, the driving mechanism is an electric push rod, which is fixedly mounted on the upper cover, and the output end of the electric push rod is drivingly connected to the inner cover.

[0016] In the above embodiment, when cooking, the driving mechanism runs to the first state so that the inner cover is in the first position; when depressurizing, the driving mechanism runs to the second state so that the inner cover rises to the second position. Compared with methods of accelerating depressurization such as water cooling and adding an exhaust valve, the method of immediately increasing the volume of the cooking space when depressurizing can make the pressure reduction in the cooking space more direct. Increasing the volume of the cooking space in the pressure cooker can achieve the goal of quickly reducing the pressure in the pot to shorten the time to open the cover after depressurization. This structure does not require the installation of a water cooling device, the modification of the exhaust device, and other complex work. It has a simple structure, low cost, and is easier to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary 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 drawings:

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of a pressure cooker according to Embodiment 1 of the present invention;

[0019] Figure 2 yes Figure 1 A front structural schematic diagram of the pressure cooker according to the first embodiment;

[0020] Figure 3 is a schematic cross-sectional structural diagram of a pressure cooker according to a first embodiment of the present invention;

[0021] Figure 4 is a schematic structural diagram of a pot cover of a pressure cooker according to a second embodiment of the present invention;

[0022] Figure 5 Shows Figure 3 The driving mechanism of the pressure cooker is a structural schematic diagram of an electric push rod. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0024] Figures 1 to 3 The first embodiment of the pressure cooker of the present invention is shown, and the pressure cooker comprises a pot body 10 and a pot cover 20. A cooking space for accommodating food is formed in the pot body 10, and the pot cover 20 is arranged above the pot body 10. The pot cover 20 comprises an upper cover 21, an inner cover 22 and a driving mechanism 23. The upper cover 21 is openably mounted on the pot body 10, and the inner cover 22 is movably mounted on the bottom of the upper cover 21, and is used to cooperate with the pot body 10 to achieve the sealing of the cooking space. The driving mechanism 23 is drivingly connected to the inner cover 22, and the driving mechanism 23 comprises a first state of driving the inner cover 22 to be pressed down to a first position, and a second state of driving the inner cover 22 to rise to a second position. When the inner cover 22 is in the second position, the volume of the cooking space is larger than that when the inner cover 22 is in the first position.

[0025] By applying the technical solution of the present invention, when cooking, the driving mechanism 23 runs to the first state to place the inner cover 22 in the first position; when depressurizing, the driving mechanism 23 runs to the second state to raise the inner cover 22 to the second position. Compared with methods of accelerating depressurization such as water cooling and adding an exhaust valve, the pressure reduction in the cooking space is more direct by increasing the volume of the cooking space immediately when depressurizing. Increasing the volume of the cooking space in the pressure cooker can achieve the goal of quickly reducing the pressure in the pot to shorten the time to open the cover after depressurization. This structure does not require the installation of a water cooling device, the modification of an exhaust device, and other complex work. It has a simple structure, low cost, and is easier to implement.

[0026] Optional, such as Figure 1 and Figure 2As shown, the pressure cooker further comprises an exhaust valve 40, which is mounted on the upper cover 21 and is used to connect the cooking space with the outside world. When the pressure is released, the exhaust valve 40 is opened to release the pressure.

[0027] like Figure 3 As shown, more preferably, the pressure cooker further comprises a controller 30, which is connected to the driving mechanism 23 and is used to control the operation of the driving mechanism 23. During cooking, the controller 30 controls the driving mechanism 23 to operate to a first state, and during pressure relief, the controller controls the driving mechanism 23 to operate to a second state. In this way, rapid pressure relief can be automated.

[0028] Optionally, in the technical solution of the first embodiment, the driving mechanism 23 is an electric push rod, which is fixedly mounted on the upper cover 21, and the output end of the electric push rod is drivingly connected to the inner cover 22. When in use, the inner cover 22 can be moved between the first position and the second position by controlling the electric push rod to extend or retract by the controller 30. As another optional implementation, an electric cylinder can also be used to realize the driving effect. Specifically, Figure 5 As shown, the electric push rod includes a motor 231, a screw nut mechanism 232 and an extension end 233. The motor 231 drives the nut member in the screw nut mechanism 232 to rotate through a gear set, so that the extension end 233 can move in the vertical direction, thereby driving the inner cover 22 to move between the first position and the second position.

[0029] Optional, such as Figure 1 and Figure 3 As shown, the pot cover 20 further includes a handle 25, which is disposed on the top of the upper cover 21 to facilitate the user to open or close the pot cover 20 during cooking.

[0030] like Figure 3 As shown, in the technical solution of the first embodiment, the pot body 10 includes a base 11 and an inner pot 12 installed in the base 11, and a cooking space is formed in the inner pot 12. Optionally, in the technical solution of the first embodiment, the inner pot 12 can be taken out from the base 11. As another feasible implementation, the inner pot 12 can also be fixed on the base 11. In the technical solution of this implementation, the pressure cooker is an electric pressure cooker, and the pressure cooker also includes an electric heating element, which is installed on the base 11 and is used to heat the inner pot 12. When cooking, the inner pot 12 is heated by the electric heating element to achieve cooking of the ingredients in the inner pot 12.

[0031] More preferably, in the technical solution of the first embodiment, the opening of the inner pot 12 is a flared structure. When the inner cover 22 rises to the second position, the inner cover 22 only needs to rise a small height to connect the entire inner pot 12 to increase the volume of the cooking space of the inner pot of the electric pressure cooker to achieve rapid pressure reduction, thereby achieving the purpose of shortening the time to open the cover.

[0032] like Figure 3 As shown, in the technical solution of the first embodiment, the pot cover 20 includes a sealing member 24, which is installed on the inner cover 22. When in use, it is used to seal the gap between the inner cover 22 and the pot body 10 to ensure the sealing of the cooking space and the pressurization performance. Figure 3 As shown, the sealing member 24 is connected between the inner cover 22 and the upper cover 21, and the sealing effect is better. Optionally, the sealing member 24 is an elastic sealing ring.

[0033] More preferably, in the technical solution of the first embodiment, the opening of the inner pot 12 is a flared structure. When the inner cover 22 rises to the second position, the inner cover 22 is raised to a small height, which can greatly increase the volume of the cooking space of the inner pot of the electric pressure cooker and achieve rapid pressure reduction, thereby achieving the purpose of shortening the time of opening the cover.

[0034] Figure 4 The second embodiment of the pressure cooker of the present invention is shown. Compared with the technical solution of the first embodiment, the technical solution of the second embodiment is different in that the elastic sealing ring is eliminated. In this way, when the opening of the inner pot 12 is an expanded structure, the entire inner pot 12 can be connected by increasing the volume of the cooking space of the inner pot of the electric pressure cooker by just raising the inner cover 22 to a small height, thereby achieving a rapid pressure reduction, thereby achieving the purpose of shortening the time to open the cover. In this embodiment, the edge of the inner cover 22 should be provided with a sealing structure that matches the inner wall of the inner pot 12.

[0035] The working principle of the present invention is as follows: after the pressure cooker completes the heating process of the food, the pressure inside the cooker is higher than the atmospheric pressure and the cover cannot be opened. The controller inside the cooker cover receives the signal of heating completion and controls the inner cover 22 that seals the inner pot 12 to rise through the driving mechanism 23. At this time, the volume of the cooking space between the inner cover 22 and the inner pot 12 increases. Since the pressure inside the cooking space is inversely proportional to the volume, the pressure in the cooking space is reduced accordingly. At the same time, the exhaust valve 40 is opened to exhaust and release the pressure until the pressure inside the cooker is equal to the atmospheric pressure, and the cooker cover 20 can be opened.

[0036] The technical solution of the present invention is a structure that can achieve rapid pressure relief. The inner cover 22 that seals the inner pot is designed as a movable structure similar to a piston thruster, which can increase the closed volume between the cover plate and the inner pot within a certain range after the electric pressure cooker finishes cooking, and achieve rapid pressure relief to shorten the pressure relief time.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the embodiments of the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure cooker, characterized in that: include: A pot body (10), wherein a cooking space for accommodating food materials is formed in the pot body (10); A pot cover (20) is arranged above the pot body (10), and the pot cover (20) comprises: An upper cover (21) which can be installed on the pot body (10); An inner cover (22) is movably mounted on the bottom of the upper cover (21) and is used to cooperate with the pot body (10) to achieve sealing of the cooking space; a driving mechanism (23) drivingly connected to the inner cover (22), the driving mechanism (23) comprising a first state of driving the inner cover (22) downward to a first position, and a second state of driving the inner cover (22) upward to a second position, the volume of the cooking space when the inner cover (22) is located at the second position being larger than the volume of the cooking space when the inner cover (22) is located at the first position; The pressure cooker further comprises a controller (30), the controller (30) being connected to the driving mechanism (23), the controller (30) being used to control the operation of the driving mechanism (23), wherein during cooking, the controller (30) controls the driving mechanism (23) to operate to the first state, and during pressure release, the controller controls the driving mechanism (23) to operate to the second state; The pot cover (20) comprises a sealing member (24), which is mounted on the inner cover (22) and is used to seal the gap between the inner cover (22) and the pot body (10), and the sealing member (24) is connected between the inner cover (22) and the upper cover (21).

2. The pressure cooker according to claim 1, characterized in that: The pressure cooker further comprises an exhaust valve (40), which is mounted on the upper cover (21) and is used to connect the cooking space with the outside world.

3. The pressure cooker according to claim 1, characterized in that: The pot cover (20) further comprises a handle (25), and the handle (25) is arranged on the top of the upper cover (21).

4. The pressure cooker according to claim 1, characterized in that: The pot body (10) comprises a base (11) and an inner pot (12) installed in the base (11), and the cooking space is formed in the inner pot (12).

5. The pressure cooker according to claim 4, characterized in that The pressure cooker is an electric pressure cooker, and the pressure cooker further comprises an electric heating element, which is mounted on the base (11) and is used to heat the inner pot (12).

6. The pressure cooker according to claim 4, characterized in that: The opening of the inner container (12) is a flared structure.

7. The pressure cooker according to claim 1, characterized in that The driving mechanism (23) is an electric push rod, which is fixedly mounted on the upper cover (21), and the output end of the electric push rod is drivingly connected to the inner cover (22).

Images