Vacuumizing device and cooking utensil

Abstract

The vacuumizing device is used for forming negative pressure in a cooking cavity and comprises a vacuum pump, a one-way valve and an air inlet pipe, the vacuum pump and the one-way valve are connected through the air inlet pipe, the one-way valve is connected with the cooking cavity through an air exhaust hole, and the one-way valve is used for opening or closing the air exhaust hole; the suction pressure of the vacuum pump in the working state is larger than the internal pressure of the one-way valve, so that the vacuum pump can open the one-way valve and exhaust the cooking cavity through the exhaust hole, and the internal pressure of the one-way valve is larger than the positive pressure of the cooking cavity in the working state. The vacuumizing device has the advantages of being simple in structure and low in cost, and is convenient to install in the cooking utensil.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking equipment, in particular to a pressure valve assembly, an upper cover assembly and a cooking utensil. Background Art

[0002] The electric rice cooker is a commonly used household appliance. During the cooking process, as the soaking time goes by and the water temperature rises, the surface of the rice grains begins to gelatinize and become sticky, and the rice grains will stick together to form a rice ball. Since the thermal conductivity of rice is much lower than that of water, the clumped rice grains will hinder the uniform transfer of heat to the rice in the steamer, causing the rice grains wrapped in the middle of the rice ball to be unable to absorb water and become half-cooked. In addition, the rice in the electric rice cooker is heated unevenly from top to bottom, so the gelatinization degree of the rice in different positions in the rice cooker is also inconsistent, causing some places to be over-gelatinized and rotten, while some places are not completely gelatinized, resulting in a large difference in the uniformity of the maturity of the whole pot of rice, affecting the taste of the rice.

[0003] In order to solve the problem of insufficient water absorption and insufficient gelatinization of rice grains, industry technicians have improved the rice cooker so that the rice cooker can achieve positive pressure and negative pressure in stages during the cooking process. Specifically, in the water absorption stage, a vacuum device is used to generate negative pressure in the pot to promote water absorption by rice grains. After boiling, the cooking cavity is sealed to generate positive pressure in the pot, so that the temperature in the pot is raised to above 100°C, which promotes sufficient gelatinization of rice grains. The existing vacuum device uses a solenoid valve to control the opening and closing of the vacuum channel of the rice cooker, and uses a vacuum pump to generate negative pressure in the rice cooker. However, the solenoid valve requires electrical control, which is not only complicated to install, but also has a high cost. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art, the utility model provides a vacuum pumping device which has the characteristics of simple structure and low cost.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] A vacuum device, used to form negative pressure in a cooking cavity, comprising a vacuum pump, a one-way valve and an air inlet pipe, wherein the vacuum pump and the one-way valve are connected via the air inlet pipe, the one-way valve is connected to the cooking cavity via an air extraction hole, and the one-way valve is used to open or close the air extraction hole;

[0007] The suction pressure of the vacuum pump in the working state is greater than the internal pressure of the one-way valve, so that the vacuum pump can open the one-way valve and evacuate the cooking cavity through the exhaust hole. The internal pressure of the one-way valve is greater than the positive pressure of the cooking cavity in the working state.

[0008] Furthermore, the vacuum pumping device also includes a sealing member, which is sealed at the connection portion between the one-way valve and the air pumping hole.

[0009] Furthermore, the one-way valve includes an air inlet, an air outlet, and a valve core arranged in the one-way valve, the air inlet is connected to the air extraction hole, and the valve core is used to open and close the air inlet to control the connection between the air inlet and the air outlet;

[0010] The vacuum pump is provided with an air inlet nozzle and an air outlet nozzle for exhausting air, and the air inlet nozzle is connected to the air outlet through an air inlet pipe.

[0011] Furthermore, the air inlet pipe is detachably connected to the air inlet nozzle and the air outlet.

[0012] Furthermore, the installation position of the air inlet nozzle is higher than or flush with the installation position of the air outlet nozzle.

[0013] The utility model also provides a cooking utensil, comprising a pot cover, a pot body and an inner pot, wherein the inner pot is arranged in a receiving cavity of the pot body, the pot cover is rotatably mounted on the pot body to form a cooking cavity between the pot cover and the pot body, and a vacuum device is mounted in the pot cover.

[0014] Furthermore, the pot cover comprises an upper cover, a middle cover and a lower cover which are arranged in sequence from top to bottom, the air extraction hole is opened in the lower cover, and the vacuum extraction device is installed in the middle cover and corresponds to the position of the air extraction hole.

[0015] Furthermore, the middle cover is provided with a through hole, the position of the through hole corresponds to the position of the exhaust hole, the one-way valve passes through the through hole and is connected to the exhaust hole, the sealing member is sealed between the one-way valve and the inner wall of the through hole, and the lower part of the sealing member extends downward to abut the top end of the lower cover.

[0016] Furthermore, the upper portion of the seal extends upward beyond the top end of the middle cover, and the upper side wall of the seal extends radially outward to form a connecting section, which extends away from one end of the seal toward the middle cover to form an extending section, and the extending section abuts against the top end of the middle cover.

[0017] Furthermore, the extending section, the connecting section and the side wall of the sealing member form a downwardly opening groove, and the inner wall of the through hole of the middle cover extends upward into the groove to form a clamping section.

[0018] Furthermore, the clamping section abuts against the top inner wall of the clamping slot.

[0019] Furthermore, the pot cover is provided with an exhaust port, the vacuum pump is connected to the exhaust port via an exhaust pipe, and the exhaust pipe is detachably connected to the vacuum pump and the exhaust port.

[0020] Beneficial effects:

[0021] The vacuum pumping device of the utility model limits the suction pressure of the vacuum pump in the working state to be greater than the internal pressure of the one-way valve, so that the vacuum pump can open the one-way valve and exhaust the cooking cavity through the exhaust hole to form a negative pressure in the cooking cavity. The one-way valve opens the exhaust hole and the negative pressure in the cooking cavity is formed by the vacuum pump. Not only is the structure simple, it is convenient to install in the cooking appliance, and the setting of the one-way valve greatly reduces the cost.

[0022] At the same time, the internal pressure of the one-way valve is greater than the positive pressure of the cooking chamber in the working state. When the vacuum pump is not working and the cooking chamber is in the positive pressure working state, the one-way valve can close the exhaust hole to prevent air leakage in the cooking chamber from affecting its positive pressure working pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the vacuum pumping device of the utility model;

[0024] Figure 2 This is an exploded view of the vacuum pumping device of the utility model;

[0025] Figure 3 This is a cross-sectional view of the vacuum device of the utility model installed in the pot cover;

[0026] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0027] Figure 5 It is a structural schematic diagram of the cooking utensil of the present utility model;

[0028] Figure 6 This is an exploded view of the cooking utensil of the present invention.

[0029] The meanings of the reference numerals are as follows:

[0030] 10. Vacuum extraction device; 1. Vacuum pump; 11. Air inlet nozzle; 12. Air outlet nozzle; 2. One-way valve; 21. Air inlet; 22. Air outlet; 3. Air inlet pipe; 4. Sealing member; 41. Connecting section; 42. Extending section; 43. Slot; 5. Exhaust pipe; 20. Pot cover; 201. Upper cover; 202. Middle cover; 2021. Through hole; 2022. Slot; 203. Lower cover; 2031. Exhaust hole. DETAILED DESCRIPTION

[0031] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0034] The utility model provides a cooking utensil, which can be an electric rice cooker, a pressure cooker or the like, and can realize positive pressure, normal pressure or negative pressure operation. Figure 5 and Figure 6 The cooking device includes a pot cover 20, a pot body 30 and an inner pot 40. The inner pot 40 is arranged in the accommodating cavity of the pot body 30. The pot cover 20 is rotatably mounted on the pot body 30 to form a cooking cavity between the pot cover 20 and the pot body 30. Since the cooking device has a negative pressure working state, that is, a negative pressure is formed in the cooking cavity, a vacuum device is required to evacuate the cooking cavity. The existing vacuum device uses a solenoid valve to control the opening and closing of the vacuum channel of the cooking cavity. However, the solenoid valve requires electrical control, which is not only complicated to install, but also has a high cost.

[0035] To this end, the utility model provides a vacuum device, see Figure 1 , which comprises a vacuum pump 1, a one-way valve 2 and an air inlet pipe 3. The vacuum pump 1 and the one-way valve 2 are connected via the air inlet pipe 3. The one-way valve 2 is connected to the cooking cavity via an air extraction hole 2031. The one-way valve 2 is used to open or close the air extraction hole 2031. The suction pressure of the vacuum pump 1 in the working state is greater than the internal pressure of the one-way valve 2, so that the vacuum pump 1 can open the one-way valve 2 and extract air from the cooking cavity via the air extraction hole 2031.

[0036] Therefore, the vacuum pump 10 of the utility model limits the suction pressure of the vacuum pump 1 in the working state to be greater than the internal pressure of the one-way valve 2, so that the vacuum pump 1 can open the one-way valve 2 and exhaust the cooking cavity through the exhaust hole 2031 to form a negative pressure in the cooking cavity. The one-way valve 2 opens the exhaust hole 2031 and forms a negative pressure in the cooking cavity through the vacuum pump 1. Not only is the structure simple and easy to install in the cooking appliance, but the setting of the one-way valve 2 greatly reduces the cost compared with the solenoid valve.

[0037] The vacuum pump 10 of the utility model is installed in the pot cover 20 of the cooking utensil, and its operation is controlled by the control system of the cooking utensil. Specifically, the vacuum pump 1 is electrically connected to the control system of the cooking utensil, and the control system controls the vacuum pump 1 to evacuate air, so that the one-way valve 2 can open the air evacuation hole 2031, so that the vacuum pump 1 can evacuate air to the cooking cavity through the one-way valve 2 and the air evacuation hole 2031 to form a negative pressure in the cooking cavity. The control system of the cooking utensil only needs to control the start and stop of the vacuum pump 1, and does not need to control the one-way valve 2. Compared with the prior art in which the solenoid valve needs to be controlled by the control system to start and stop, the control circuit of the utility model is simpler, which greatly reduces the workload of software engineers and simplifies the circuit connection relationship in the cooking utensil.

[0038] See also Figure 3 and Figure 4 The pot cover 20 includes an upper cover 201, a middle cover 202 and a lower cover 203 arranged in sequence from top to bottom, an air extraction hole 2031 is provided in the lower cover 203, and the vacuum device 10 is installed in the middle cover 202 and corresponds to the position of the air extraction hole 2031. Therefore, the vacuum device 10 is hidden in the pot cover 20, does not contact with the outside, and is not easily damaged.

[0039] Specifically, the air extraction hole 2031 passes through the lower cover 203 to communicate with the cooking cavity. The vacuum pump 1 is installed on the middle cover 202. The middle cover 202 is provided with a through hole 2021. The position of the through hole 2021 corresponds to the position of the air extraction hole 2031. The one-way valve 2 passes through the through hole 2021 and is connected to the air extraction hole 2031.

[0040] On the basis of this structure, the one-way valve 2 is located above the cooking cavity. Since the cooking appliance also has a positive pressure working state, the vacuum pump 1 is not working at this time. When the cooking appliance is working at positive pressure, the positive pressure in the cooking cavity will generate an upward thrust on the one-way valve. Once the thrust opens the one-way valve 2, it will cause the cooking cavity to leak from the air extraction hole 2031, affecting the positive pressure in the cooking cavity. For this reason, the internal pressure of the one-way valve 2 of the utility model is greater than the positive pressure in the working state of the cooking cavity. When the vacuum pump 1 is not working and the cooking cavity is in the positive pressure working state, the one-way valve 2 can close the air extraction hole 2031 to avoid air leakage in the cooking cavity and affect its positive pressure working pressure.

[0041] See also Figure 1 and Figure 2The one-way valve 2 includes an air inlet 21, an air outlet 22, and a valve core disposed in the one-way valve 2. The air inlet 21 is connected to the air extraction hole 2031. The valve core is used to open and close the air inlet 21 to control the connection between the air inlet 21 and the air outlet 22. The vacuum pump 1 is provided with an air inlet nozzle 11 and an air outlet nozzle 12 for exhausting air. The air inlet nozzle 11 is connected to the air outlet 22 through the air inlet pipe 3. Thus, the vacuum pump 1 can drive the valve core to open the air inlet 21 when exhausting air, so that the cooking cavity, the air extraction hole 2031, the air inlet 21 and the air outlet 22 are connected in sequence, so that the vacuum pump 1 can exhaust air from the cooking cavity through the air inlet pipe 3 to form a negative pressure in the cooking cavity.

[0042] Specifically, the one-way valve 2 of the utility model has a cavity inside, the air inlet 21 is arranged at the bottom of the one-way valve 2 and communicates with the cavity, the air outlet 22 is arranged at the side of the one-way valve 2 and communicates with the cavity, and the valve core is arranged in the cavity and can move up and down. When the vacuum pump is not working and the cooking cavity is not under positive pressure, the valve core closes the air inlet 21 due to gravity, thereby blocking the communication between the air inlet 21 and the air outlet 22. When the cooking appliance needs to work under negative pressure, the vacuum pump 1 draws air, and the suction pressure of the vacuum pump 1 is greater than the gravity of the valve core, thereby driving the valve core to move upward to open the air inlet 21, so that the cooking cavity, the air extraction hole 2031, the air inlet 21 and the air outlet 22 are connected in sequence, so that the vacuum pump 1 can draw air from the cooking cavity through the air inlet pipe 3 to form a negative pressure in the cooking cavity.

[0043] Based on this structure, the internal pressure of the one-way valve 2 is the weight of the valve core. The one-way valve 2 of the utility model realizes the opening and closing of the air inlet 21 by the up and down movement of the valve core, and has a simple structure. In addition, since there is no other linkage structure, the suction pressure of the vacuum pump 1 only needs to overcome the gravity of the valve core, and the power requirement for the vacuum pump 1 is low, and the energy consumption of the vacuum pump 1 is low, and it can be used for a long time. Of course, in practical applications, the one-way valve 2 can select a component with a linkage structure such as a spring and a connecting rod.

[0044] In addition, the air inlet pipe 3, the air inlet nozzle 11 and the air outlet 22 are all detachably connected, which is convenient for replacement and cleaning of the air inlet pipe 3. Moreover, the air inlet pipe 3, the air inlet nozzle 11 and the air outlet 22 are all connected by interference fit to ensure the sealing of the connection between the air inlet pipe 3, the air inlet nozzle 11 and the air outlet 22 to avoid air leakage.

[0045] Based on the above structure, the installation position of the air inlet nozzle 11 is higher than or flush with the installation position of the air outlet nozzle 12, which facilitates the installation of the air inlet pipe 3. In addition, the air inlet nozzle 11 is arranged closer to the air outlet 22 than the air outlet nozzle 12 to shorten the length of the air inlet pipe 3 and reduce costs.

[0046] The pot cover 20 is provided with an exhaust port, and the vacuum pump 1 is connected to the exhaust port through an exhaust pipe 5 to discharge the gas drawn from the cooking cavity by the vacuum pump 1. Specifically, the exhaust port is provided in the middle cover 202, and the gas outlet nozzle 12 of the vacuum pump 1 is connected to the exhaust port through the exhaust pipe 5 to discharge the gas.

[0047] The exhaust pipe 5 is detachably connected to the air outlet nozzle 12 and the exhaust port of the vacuum pump 1, which is convenient for replacement and cleaning of the exhaust pipe 5. In addition, the exhaust pipe 5 is connected to the air outlet nozzle 12 and the exhaust port by interference fit to ensure the sealing of the connection between the exhaust pipe 5, the air outlet nozzle 12 and the exhaust port to avoid air leakage.

[0048] See also Figure 2 and Figure 4 The vacuum pumping device 10 further includes a seal 4, which is sealed at the connection between the one-way valve 2 and the air extraction hole 2031 to avoid air leakage, so as to ensure that the vacuum pump 1 can efficiently achieve negative pressure in the cooking cavity.

[0049] Specifically, the seal 4 is sealed between the one-way valve 2 and the inner wall of the through hole 2021, and the lower part of the seal 4 extends downward to abut the top of the lower cover 203 to ensure that the gas in the cooking cavity is directly extracted from the exhaust hole 2031 into the one-way valve 2 through the air inlet 21 and is extracted by the vacuum pump 1.

[0050] The upper portion of the seal 4 extends upward to exceed the top end of the middle cover 202, and the upper side wall of the seal 4 extends radially outward to form a connecting section 41, and one end of the connecting section 41 away from the seal 4 extends toward the middle cover 202 to form an extending section 42, and the extending section 42 abuts against the top end of the middle cover 202. In this way, air leakage between the seal 4 and the inner wall of the through hole 2021 of the middle cover 202 can be avoided.

[0051] The extension section 42, the connecting section 41 and the side wall of the seal 4 form a downwardly opening slot 43, and the inner wall of the through hole 2021 of the middle cover 202 extends upward into the slot 43 to form a segment 2022. The segment 2022 is locked in the slot 43 to further ensure the sealing between the seal 4 and the middle cover 202.

[0052] The clamping segment 2022 abuts against the top inner wall of the clamping groove 43, preventing the gas in the cooking cavity from flowing out from between the inner wall of the through hole 2021 and the seal 4, and leaking out from between the clamping segment 2022 and the clamping groove 43, so that the sealing performance of the seal 4 reaches the optimal performance, and the possibility of air leakage between the seal 4 and the inner wall of the through hole 2021 of the middle cover 202 is eliminated.

[0053] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A vacuum device for forming negative pressure in a cooking cavity, characterized in that: include: A vacuum pump (1), a one-way valve (2) and an air intake pipe (3), wherein the vacuum pump (1) and the one-way valve (2) are connected via the air intake pipe (3), the one-way valve (2) is connected to the cooking cavity via an air extraction hole (2031), and the one-way valve (2) is used to open or close the air extraction hole (2031); The suction pressure of the vacuum pump (1) in the working state is greater than the internal pressure of the one-way valve (2), so that the vacuum pump (1) can open the one-way valve (2) and exhaust air from the cooking cavity through the exhaust hole (2031); the internal pressure of the one-way valve (2) is greater than the positive pressure of the cooking cavity in the working state.

2. The vacuum pumping device according to claim 1, characterized in that: The vacuum extraction device (10) further comprises a sealing member (4), wherein the sealing member (4) is provided for sealing at a connection portion between the one-way valve (2) and the air extraction hole (2031).

3. The vacuum pumping device according to claim 2, characterized in that: The one-way valve (2) comprises an air inlet (21), an air outlet (22) and a valve core arranged in the one-way valve (2); the air inlet (21) is in communication with the air extraction hole (2031); the valve core is used to open and close the air inlet (21) to control the connection between the air inlet (21) and the air outlet (22); The vacuum pump (1) is provided with an air inlet nozzle (11) and an air outlet nozzle (12) for exhausting air, and the air inlet nozzle (11) is connected to the air outlet (22) through the air inlet pipe (3).

4. The vacuum pumping device according to claim 3, characterized in that: The air inlet pipe (3) is detachably connected to the air inlet nozzle (11) and the air outlet (22).

5. The vacuum pumping device according to claim 3, characterized in that: The installation position of the air inlet nozzle (11) is higher than or flush with the installation position of the air outlet nozzle (12).

6. A cooking utensil, characterized in that: The invention comprises a pot cover (20), a pot body (30) and an inner pot (40), wherein the inner pot (40) is arranged in a receiving cavity of the pot body (30), the pot cover (20) is rotatably mounted on the pot body (30) to form the cooking cavity between the pot cover (20) and the pot body (30), and the vacuum extraction device (10) described in any one of claims 2 to 5 is mounted in the pot cover (20).

7. The cooking device according to claim 6, characterized in that: The pot cover (20) comprises an upper cover (201), a middle cover (202) and a lower cover (203) which are arranged in sequence from top to bottom; the air extraction hole (2031) is provided in the lower cover (203); and the vacuum extraction device (10) is installed on the middle cover (202) and corresponds to the position of the air extraction hole (2031).

8. The cooking device according to claim 7, characterized in that: The middle cover (202) is provided with a through hole (2021), the position of the through hole (2021) corresponds to the position of the air extraction hole (2031), the one-way valve (2) passes through the through hole (2021) and is connected to the air extraction hole (2031), the sealing member (4) is sealingly arranged between the one-way valve (2) and the inner wall of the through hole (2021), and the lower part of the sealing member (4) extends downward to abut against the top end of the lower cover (203).

9. The cooking device according to claim 8, characterized in that: The upper portion of the sealing member (4) extends upward to exceed the top end of the middle cover (202), and the upper side wall of the sealing member (4) is provided with a connecting section (41) extending radially outward, and one end of the connecting section (41) away from the sealing member (4) extends toward the middle cover (202) to form an extending section (42), and the extending section (42) abuts against the top end of the middle cover (202).

10. The cooking device according to claim 9, characterized in that: The extension section (42), the connection section (41) and the side wall of the sealing member (4) form a downwardly opening groove (43), and the inner wall of the through hole (2021) of the middle cover (202) extends upward into the groove (43) to form a groove section (2022).

11. The cooking device according to claim 10, characterized in that: The locking section (2022) abuts against the top inner wall of the locking slot (43).

12. The cooking device according to claim 6, characterized in that: The pot cover (20) is provided with an exhaust port, and the vacuum pump (1) is connected to the exhaust port via an exhaust pipe (5), and the exhaust pipe (5) is detachably connected to the vacuum pump (1) and the exhaust port.

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