Vacuum pump and negative pressure cooking utensil

Abstract

The utility model belongs to the technical field of suction pumps, and particularly provides a vacuum pump and a negative pressure cooking utensil. In order to solve the problem that a pipeline is complicated due to the fact that an existing negative pressure cooking utensil is provided with a one-way valve, the vacuum pump comprises a pump body and a gas check valve. The pump body is provided with an air inlet and an air outlet. The gas check valve comprises a valve body and a check component, the valve body is fixedly connected with the pump body and defines a first exhaust channel, a control cavity and a second exhaust channel which are communicated in sequence, and the first exhaust channel is communicated with the gas outlet; a non-return member is disposed within the control cavity and is configured to allow gas to flow from the first exhaust passage to the second exhaust passage and not to allow gas to flow from the second exhaust passage to the first exhaust passage. When the vacuum pump is applied to the negative-pressure cooking utensil, the negative-pressure cooking utensil is prevented from being provided with a one-way valve, and an exhaust pipeline of the negative-pressure cooking utensil is simplified. The technical problem is solved.

Description

Vacuum pumps and negative pressure cooking appliances Technical Field

[0001] This utility model belongs to the field of suction pump technology, specifically providing a vacuum pump and a negative pressure cooking appliance. Background Technology

[0002] A negative pressure cooking appliance is a type of cooking appliance that uses a built-in vacuum pump to extract gas from the cooking chamber, creating a negative pressure cooking environment. By lowering the gas pressure inside the cooking chamber, the boiling point of water in the chamber is reduced, allowing for low-temperature cooking of food, preserving more nutrients and improving the taste.

[0003] To prevent the extracted gas from flowing back into the cooking chamber, a one-way valve is typically connected in series upstream or downstream of the vacuum pump. This not only increases the cost of the negative pressure cooking appliance but also increases the complexity of the piping. Summary of the Invention

[0004] One objective of this invention is to solve the problem of complex piping caused by the one-way valve in existing negative pressure cooking appliances.

[0005] To achieve the above objectives, the present invention provides a vacuum pump in a first aspect, comprising:

[0006] The pump body has an air inlet and an air outlet;

[0007] A gas check valve includes a valve body and a check component. The valve body is fixedly connected to the pump body and defines a first exhaust channel, a control chamber, and a second exhaust channel that are connected in sequence. The first exhaust channel is connected to the gas outlet. The check component is disposed in the control chamber and configured to allow gas to flow from the first exhaust channel to the second exhaust channel, but not to allow gas to flow from the second exhaust channel to the first exhaust channel.

[0008] Optionally, the outlet of the first exhaust passage and the inlet of the second exhaust passage are formed on the same sidewall of the control chamber, and the check valve prevents gas from flowing from the second exhaust passage to the first exhaust passage by fitting against the sidewall.

[0009] Optionally, the valve body includes a valve seat fixedly connected to the pump body and a valve cover fixedly connected to the valve seat, the first exhaust passage and the second exhaust passage are defined by the valve body, the control chamber is jointly defined by the valve seat and the valve cover, and the check valve is clamped by the valve seat and the valve cover.

[0010] Optionally, the check valve component includes a check valve portion, a sleeve portion, and a fixing portion; the check valve portion is used to control whether the first exhaust passage and the second exhaust passage are connected; the sleeve portion extends from the check valve portion to the valve body or the valve cover; the fixing portion is disposed on the outside of the sleeve portion and is clamped by the valve seat and the valve cover.

[0011] Optionally, the check valve is plate-shaped; and / or, both the sleeve portion and the fixing portion are annular; and / or, the fixing portion is located at the end of the sleeve portion away from the check valve.

[0012] Optionally, the gas check valve further includes a spring; the valve cover is provided with a clearance cavity for avoiding the spring on the side of the control cavity away from the valve seat, and the clearance cavity is connected to the control cavity; the two ends of the spring abut against the valve cover and the check part respectively, so as to provide the check part with a force that presses against the side wall of the control cavity.

[0013] Optionally, the check valve is provided with a groove for locking the spring, so as to fix one end of the spring near the check valve.

[0014] Optionally, the valve cover further defines a third exhaust passage, the inlet of which is aligned with the outlet of the second exhaust passage; the check valve is provided with a connecting hole for connecting the third exhaust passage and the second exhaust passage.

[0015] Optionally, the check valve is made of an elastic material; and / or the vacuum pump is suitable for negative pressure cooking appliances.

[0016] In a second aspect, this utility model provides a negative pressure cooking appliance, characterized in that it comprises:

[0017] The body has a cooking cavity;

[0018] The lid is used to open and close the cooking chamber;

[0019] The vacuum pump described in any one of the first aspects is used to discharge gas from the cooking chamber to the outside, thereby providing a negative pressure cooking environment for the cooking chamber.

[0020] Based on the foregoing description, those skilled in the art will understand that in the aforementioned technical solution of this utility model, by configuring a gas check valve for the vacuum pump, the vacuum pump itself can prevent gas backflow, avoiding the need to configure an additional one-way valve. Therefore, when the vacuum pump of this utility model is applied to negative pressure cooking appliances, it avoids the need to install a one-way valve in the negative pressure cooking appliance, simplifying the exhaust pipe of the negative pressure cooking appliance.

[0021] Furthermore, by forming the outlet of the first exhaust channel and the inlet of the second exhaust channel on the same side wall of the control chamber, the check valve can prevent gas from flowing from the second exhaust channel to the first exhaust channel by fitting against the side wall, resulting in a simple structure.

[0022] Furthermore, by clamping the check valve member between the valve seat and the valve cover, the installation of the check valve member is facilitated.

[0023] Furthermore, the spring provides a force to the check valve to press against the side wall of the control chamber, ensuring the reliability of the check valve when blocking the first exhaust passage and the second exhaust passage.

[0024] Furthermore, by providing a recessed groove on the check valve to hold the spring, the end of the spring near the check valve is fixed, ensuring the reliability of the spring's contact with the check valve and preventing the spring from becoming misaligned during long-term use of the vacuum pump.

[0025] Other beneficial effects of this utility model will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the improvement purpose, features and advantages of this utility model. Attached Figure Description

[0026] To more clearly illustrate the technical solution of this utility model, some embodiments of this utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that the same reference numerals may indicate the same or similar components or parts in different drawings; the drawings of this utility model are not necessarily drawn to scale. In the drawings:

[0027] Figure 1 is a perspective view of the vacuum pump in some embodiments of this utility model;

[0028] Figure 2 is an exploded view of the vacuum pump in Figure 1;

[0029] Figure 3 is a schematic cross-sectional view of the vacuum pump in Figure 1 along the AA direction;

[0030] Figure 4 is a schematic diagram of gas flow during vacuum pump exhaust in Figure 3;

[0031] Figure 5 is a schematic diagram of gas flow during vacuum pump intake in Figure 3;

[0032] Figure 6 is a structural schematic diagram of a negative pressure cooking appliance in some embodiments of this utility model.

[0033] Explanation of reference numerals in the attached figures:

[0034] 001. Vacuum pump;

[0035] 100. Pump body; 101. Air inlet; 102. Air outlet; 103. Working chamber;

[0036] 200. Gas check valve; 210. Valve body; 2101. First exhaust passage; 2102. Control chamber; 2103. Second exhaust passage; 2104. Third exhaust passage; 2105. Clearance chamber; 211. Valve seat; 212. Valve cover; 220. Check component; 221. Check part; 2211. Settlement groove; 2212. Connecting hole; 222. Sleeve part; 223. Fixing part; 230. Spring;

[0037] 300. Motor; 310. Shaft;

[0038] 410. Eccentric component; 420. Drive rod; 430. Piston; 440. Air cylinder; 450. One-way valve;

[0039] 002. Negative pressure cooking appliances;

[0040] 500. Body; 501. Cooking cavity; 510. Lid opening button;

[0041] 600, Engine cover; 601, Exhaust port. Detailed Implementation

[0042] Those skilled in the art should understand that the embodiments described below are merely some embodiments of the present invention, and not all embodiments of the present invention. These embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0043] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the corresponding device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. For example, unless otherwise specified, the terms "installation," "connection," "joining," and "fixing" can specifically refer to any feasible connection form such as bolt connection, screw connection, welding, insertion, riveting, fusion welding, or snap-fit.

[0045] As shown in Figures 1 to 3, in some embodiments of this utility model, the vacuum pump 001 includes a pump body 100, a gas check valve 200, and a motor 300. The pump body 100 is used to extract gas, the gas check valve 200 is used to prevent the gas discharged from the pump body 100 from flowing back, and the motor 300 is used to drive the pump body 100 to operate.

[0046] In addition, in other embodiments of this utility model, those skilled in the art may omit the motor 300 as needed and configure an additional motor 300 or other drive device for the vacuum pump 001 during use.

[0047] As shown in Figures 2 and 3, in some embodiments of this utility model, the pump body 100 has an air inlet 101 and an air outlet 102.

[0048] As shown in Figures 2 to 5, in some embodiments of this utility model, the gas check valve 200 includes a valve body 210 and a check member 220. The valve body 210 is fixedly connected to the pump body 100 and defines a first exhaust passage 2101, a control chamber 2102, and a second exhaust passage 2103 that are sequentially connected. The first exhaust passage 2101 communicates with the gas outlet 102. The check member 220 is disposed in the control chamber 2102 and configured to allow gas to flow from the first exhaust passage 2101 to the second exhaust passage 2103, but not to allow gas to flow from the second exhaust passage 2103 to the first exhaust passage 2101.

[0049] As can be seen from Figure 3, in some embodiments of this utility model, the outlet of the first exhaust channel 2101 and the inlet of the second exhaust channel 2103 are formed on the same side wall of the control cavity 2102, and the check member 220 prevents gas from flowing from the second exhaust channel 2103 to the first exhaust channel 2101 by fitting against the side wall.

[0050] As shown in Figures 2 and 3, in some embodiments of this utility model, the valve body 210 includes a valve seat 211 fixedly connected to the pump body 100 and a valve cover 212 fixedly connected to the valve seat 211.

[0051] As can be seen from Figure 3, the first exhaust passage 2101 and the second exhaust passage 2103 are defined by the valve body 210.

[0052] As can also be seen from Figure 3, the control cavity 2102 is defined by the valve seat 211 and the valve cover 212.

[0053] As can also be seen from Figure 3, the check component 220 is clamped by the valve seat 211 and the valve cover 212, which facilitates the installation and fixation of the check component 220.

[0054] As shown in Figures 2 and 3, in some embodiments of this utility model, the pump body 100 is provided with a plurality of threaded holes on the side facing the valve seat 211, and the valve seat 211 and the valve cover 212 are respectively provided with through holes aligned with the threaded holes.

[0055] During assembly, the pump body 100, valve seat 211, check member 220 and valve cover 212 are stacked together in sequence. Then, the bolts are passed through the through holes on the valve seat 211 and valve cover 212 and tightened together with the threaded holes on the pump body 100, thereby fixing the pump body 100, valve seat 211, check member 220 and valve cover 212 together, and thus clamping the check member 220 by the valve seat 211 and valve cover 212.

[0056] As shown in Figures 2 and 3, in some embodiments of this utility model, the check valve component 220 includes a check valve part 221, a sleeve part 222, and a fixing part 223.

[0057] The check valve 221 is used to control whether the first exhaust passage 2101 and the second exhaust passage 2103 are connected, and it can be in the form of a sheet.

[0058] Those skilled in the art will understand that the sheet-like check valve 221 can prevent the control chamber 2102 from being too large in the axial direction along the motor 300, which is beneficial to reducing the size of the vacuum pump 001.

[0059] The sleeve portion 222 extends from the check portion 221 toward the valve body 210 or the valve cover 212, and may be annular.

[0060] The fixing part 223 is located on the outside of the sleeve part 222, and can be annular. It is located at the end of the sleeve part 222 away from the check part 221, and is clamped by the valve seat 211 and the valve cover 212.

[0061] As can be seen from Figures 3 to 5, a sheet-like gap (not marked in the figures) is formed between the valve seat 211 and the valve cover 212 to accommodate the check part 221, a longitudinal annular gap (not marked in the figures) to accommodate the sleeve part 222, and a transverse annular gap (not marked in the figures) to accommodate the fixing part 223. Among them, at least the sheet-like gap, the longitudinal annular gap, and the transverse annular gap belong to the control cavity 2102.

[0062] Furthermore, the sleeve 222 is sleeved on the valve seat 211 and has a clearance fit with the valve cover 212, so that during the assembly process, the sleeve 222 can be sleeved on the valve seat 211 first, which is convenient for the assembly personnel to assemble.

[0063] As shown in Figures 2 and 3, in some embodiments of this utility model, the gas check valve 200 further includes a spring 230.

[0064] As shown in Figures 3 to 5, the valve cover 212 has a clearance cavity 2105 on the side of the control cavity 2102 away from the valve seat 211, which is used to avoid the spring 230. The clearance cavity 2105 is connected to the control cavity 2102. Furthermore, the two ends of the spring 230 abut against the valve cover 212 and the check part 221, respectively, to provide the check part 221 with a force that presses against the side wall of the control cavity 2102.

[0065] As shown in Figures 2 and 3, in some embodiments of this utility model, the check part 221 is provided with a groove 2211 for locking the spring 230, so as to fix the end of the spring 230 near the check part 221.

[0066] The groove 2211 can be an annular groove to better position the spring 230 and prevent the spring 230 from moving radially.

[0067] Those skilled in the art will understand that by providing a recess 2211 on the check part 221 for locking the spring 230, the end of the spring 230 near the check part 221 is fixed, ensuring the reliability of the spring 230 abutting against the check part 221, and preventing the spring 230 from becoming misaligned during long-term use of the vacuum pump 001.

[0068] As shown in Figures 2 and 3, in some embodiments of this utility model, the valve cover 212 further defines a third exhaust channel 2104, the inlet of which is aligned with the outlet of the second exhaust channel 2103. Furthermore, the check valve 221 is provided with a connecting hole 2212 for connecting the third exhaust channel 2104 and the second exhaust channel 2103.

[0069] As shown in Figures 3 to 5, in some embodiments of this utility model, the pump body 100 defines a working chamber 103 that communicates with the air inlet 101 and the air outlet 102 respectively. The vacuum pump 001 also includes an eccentric component 410 fixedly connected to the rotating shaft 310 of the motor 300, a drive rod 420 connected to the eccentric component 410, a piston 430 connected to the drive rod 420, an air cylinder 440 slidably engaged with the piston 430, and a one-way valve 450 for opening and closing the air outlet 102.

[0070] The eccentric component 410, drive rod 420, piston 430, and air cylinder 440 are all arranged in the working chamber 103. The eccentric component 410 and piston 430 are hinged to the drive rod 420, and the air cylinder 440 is fixedly connected to the pump body 100 or integrally formed.

[0071] As can be seen from Figures 2 to 5, the pump body 100 has multiple air outlets 102, which are distributed at intervals along the circumference of the pump body 100. A through hole (not marked in the figure) is provided in the middle of the multiple air outlets 102. The one-way valve 450 is configured as a cap, having a rod-shaped part (not marked in the figure) that is inserted into the through hole and slidably connected to the pump body 100, and a cap-shaped part (not marked in the figure) for blocking the air outlets 102.

[0072] As shown in Figures 4 and 5, when the motor 300 rotates, the rotating shaft 310 of the motor 300 drives the eccentric component 410 to rotate, and thus forces the piston 430 to reciprocate in the air cylinder 440 through the drive rod 420.

[0073] As shown in Figure 4, when the piston 430 moves upward, it compresses the gas, causing the gas pressure inside the cylinder 440 to gradually increase until the one-way valve 450 is opened, allowing the gas to flow into the first exhaust passage 2101. When the gas pressure inside the first exhaust passage 2101 increases to the point where it can overcome the elastic force of the spring 230, the gas pressure inside the first exhaust passage 2101 pushes open the check valve 221. The gas inside the first exhaust passage 2101 is then discharged to the outside through the second exhaust passage 2103, the connecting hole 2212, and the third exhaust passage 2104.

[0074] As piston 430 moves downward, the air pressure inside cylinder 440 gradually decreases, causing check valve 450 to close outlet 102 due to the pressure difference between the two sides. As piston 430 continues to move downward, the air pressure inside cylinder 440 decreases further. When piston 430 reaches the position shown in Figure 5, gas in working chamber 103 rapidly enters cylinder 440, thus replenishing working chamber 103 with external gas. Then, piston 430 continues to move upward. This cycle repeats, drawing gas in through inlet 101 and discharging it through third exhaust channel 2104.

[0075] When the motor 300 stops working, the spring 230 pushes the check part 221 to re-adhere to the side wall of the control cavity 2102, blocking the connection between the first exhaust channel 2101 and the second exhaust channel 2103, and preventing gas backflow.

[0076] Furthermore, in order to enable the one-way valve 450 to quickly close the outlet 102, a spring can also be provided for the one-way valve 450 to move the cap-shaped part toward the outlet 102.

[0077] It should be noted that Figures 3 to 5 are merely schematic representations of the eccentric component 410, drive rod 420, piston 430, air cylinder 440, and one-way valve 450, intended to illustrate the working principle of the pump body 100. However, since the technique of creating a vacuum within the pump body 100 using a piston-type structure is a conventional technique in the field, and relatively mature products already exist, it will not be described in detail here.

[0078] It should also be noted that the pump body 100 of this utility model is not limited to the piston structure described above in conjunction with Figures 1 to 4, but can also be any other feasible form, such as a vane structure, a liquid ring structure, a turbine structure, a screw structure, etc.

[0079] As shown in Figure 6, this utility model also provides a negative pressure cooking appliance 002. The negative pressure cooking appliance 002 includes a body 500, a lid 600, and a vacuum pump 001 as described in any of the preceding embodiments. The body 500 has a cooking chamber 501, and the lid 600 is used to open and close the cooking chamber 501. The body 500 is also provided with a lid-opening button 510, which is used to open the closed lid 600 by pressing the lid-opening button 510. The vacuum pump 001 is used to exhaust the gas in the cooking chamber 501 to the outside, thereby providing a negative pressure cooking environment for the cooking chamber 501.

[0080] Furthermore, although not shown in the figure, in some embodiments of this utility model, the vacuum pump 001 can be installed inside the cover 600 and connected to the exhaust port 601 through a pipeline.

[0081] Based on the foregoing description, those skilled in the art will understand that by configuring a gas check valve 200 for the vacuum pump 001, the present invention enables the vacuum pump 001 to prevent gas backflow itself, avoiding the need for an additional one-way valve. Therefore, when the vacuum pump 001 of the present invention is applied to the negative pressure cooking appliance 002, it avoids the need for a separate one-way valve in the negative pressure cooking appliance 002, simplifying the exhaust pipe of the negative pressure cooking appliance 002.

[0082] The technical solution of this utility model has been described in conjunction with several embodiments above. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is not limited to these specific embodiments. Without departing from the technical principles of this utility model, those skilled in the art can disassemble and combine the technical solutions in the above embodiments, and can also make equivalent changes or substitutions to the relevant technical features. Any changes, equivalent substitutions, improvements, etc., made within the technical concept and / or technical principles of this utility model will fall within the protection scope of this utility model.

[0083] Finally, it should be noted that in this invention, the term "connection" refers to fluid communication, allowing fluids (e.g., gases, liquids) to flow between two interconnected entities. Furthermore, this "connection" can be either a leak-free flow of fluid between two interconnected entities, or a flow with slight leakage between two interconnected entities.

Claims

1. A vacuum pump, characterized in that, include: A pump body has an air inlet and an air outlet; a gas check valve includes a valve body and a check member, the valve body is fixedly connected to the pump body and defines a first exhaust channel, a control chamber and a second exhaust channel that are connected in sequence, the first exhaust channel is connected to the air outlet; the check member is disposed in the control chamber and is configured to allow gas to flow from the first exhaust channel to the second exhaust channel, but not allow gas to flow from the second exhaust channel to the first exhaust channel.

2. The vacuum pump according to claim 1, characterized in that, The outlet of the first exhaust passage and the inlet of the second exhaust passage are formed on the same sidewall of the control chamber, and the check valve prevents gas from flowing from the second exhaust passage to the first exhaust passage by fitting against the sidewall.

3. The vacuum pump according to claim 2, characterized in that, The valve body includes a valve seat fixedly connected to the pump body and a valve cover fixedly connected to the valve seat. The first exhaust passage and the second exhaust passage are defined by the valve body. The control chamber is defined by the valve seat and the valve cover. The check valve is clamped by the valve seat and the valve cover.

4. The vacuum pump according to claim 3, characterized in that, The check valve component includes a check valve part, a sleeve part, and a fixing part; the check valve part is used to control whether the first exhaust passage and the second exhaust passage are connected; the sleeve part extends from the check valve part to the valve body or the valve cover; the fixing part is disposed on the outside of the sleeve part and is clamped by the valve seat and the valve cover.

5. The vacuum pump according to claim 4, characterized in that, The check valve is plate-shaped; and / or, both the sleeve portion and the fixing portion are annular; and / or, the fixing portion is located at the end of the sleeve portion away from the check valve.

6. The vacuum pump according to claim 4, characterized in that, The gas check valve also includes a spring; the valve cover is provided with a clearance cavity for avoiding the spring on the side of the control cavity away from the valve seat, and the clearance cavity is connected to the control cavity; the two ends of the spring abut against the valve cover and the check part respectively, so as to provide the check part with a force that presses against the side wall of the control cavity.

7. The vacuum pump according to claim 6, characterized in that, The check valve is provided with a groove for locking the spring, so as to fix the end of the spring near the check valve.

8. The vacuum pump according to claim 4, characterized in that, The valve cover also defines a third exhaust passage, the inlet of which is aligned with the outlet of the second exhaust passage; the check valve is provided with a connecting hole for connecting the third exhaust passage and the second exhaust passage.

9. The vacuum pump according to any one of claims 1 to 8, characterized in that, The check valve is made of an elastic material; and / or the vacuum pump is suitable for negative pressure cooking appliances.

10. A negative pressure cooking appliance, characterized in that, include: The body has a cooking cavity; The lid is used to open and close the cooking chamber; The vacuum pump according to any one of claims 1 to 9, wherein the vacuum pump is used to discharge gas in the cooking chamber to the outside, so as to provide a negative pressure cooking environment for the cooking chamber.

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