Electric vacuum pump

Abstract

Provide an electric vacuum pump. The pump includes a housing (2, 9) and an intake chamber (10), which accommodates a bleed unit, negative pressure detection units (4, 5), and an air guide passage. The intake chamber is attached to the lower part of the housing and communicates with the air guide passage. The bleed unit includes a pump body (12), a connecting member (13), and pipes (14, 15) for drawing in gas and / or liquid. The connecting member connects to the intake chamber via the air guide passage and to the air inlet of the pump body via pipe (14), forming an intake passage. The pipe (15) also connects to the vent of the pump body and extends to the outside of the housing, forming an exhaust passage. The negative pressure detection unit communicates with the intake chamber via the connecting member, forming a negative pressure detection passage independent of the intake passage. Gas and / or liquid enter the exhaust passage through the intake passage and the pump body, allowing them to be smoothly discharged and cleaned by drawing in clean water, effectively preventing contamination and bacterial growth.

Description

[Technical Field]

[0001] The present invention relates to the field of vacuum freshening equipment, and more particularly to an electric vacuum pump. [Background technology]

[0002] Vacuum preservation is an effective food preservation method that can significantly extend the shelf life of food and maintain its freshness, so it is widely used in household life. Currently, there are two types of vacuum pumps in common: electric and manual, but each has some shortcomings in practical use.

[0003] Conventional manual vacuum pumps cannot determine the negative pressure inside the freshness-preserving container during use, making it difficult to achieve an ideal vacuum freshness effect. If the negative pressure inside the container is too low, effective freshness preservation cannot be achieved, and if the negative pressure is too high, the freshness-preserving container may be damaged. Furthermore, manual vacuum pumps have a single exterior design, are tall, require greater gripping force, and are cumbersome to use.

[0004] In addition, conventional electric vacuum pumps are generally powered by built-in lithium batteries or dry batteries. The built-in lithium batteries have a limited service life and are difficult to replace, shortening the service life of the entire product. Meanwhile, products that use dry batteries require frequent battery replacement, increasing operating costs.

[0005] Second, conventional electric vacuum pumps are difficult to clean after absorbing food broth, and bacteria easily grow, corroding the internal parts and affecting the product's service life and hygiene. Furthermore, conventional electric vacuum pumps often lack a negative pressure monitoring function, meaning they cannot automatically shut off when a preset negative pressure is reached, which can lead to excessive negative pressure inside the freshness-keeping container and lead to damage.

[0006] Finally, conventional electric vacuum pumps have a single appearance design, often in the shape of a cylinder or a prism, which makes them tall and prone to tipping, and cannot meet consumers' needs for diverse appearances. Summary of the Invention [Problem to be solved by the invention]

[0007] The purpose of this invention is to provide an electric vacuum pump that solves the problems of the prior art, such as a single power supply method, difficulty in cleaning the interior, and lack of a negative pressure monitoring function, thereby improving the service life and convenience of the electric vacuum pump. [Means for solving the problem]

[0008] In order to solve the above technical problems, the present invention provides an electric bleed pump, which includes a housing and an air intake chamber, and the housing is provided with a bleed unit, a negative pressure detection unit and an air guide passage; the intake chamber is attached to a lower portion of the housing and communicates with the air guide passage; the air extraction unit includes a pump body, a connecting member, and a pipe, and is used to suck gas and / or liquid, the connecting member is connected to the intake chamber via the air guide passage, and is connected to an air inlet of the pump body via the pipe to form an intake passage, the pipe is further connected to an air vent of the pump body, protrudes to the outside of the housing, and forms an exhaust passage, the negative pressure detection unit communicates with the intake chamber via the connecting member and forms a negative pressure detection passage independent of the intake passage; The gas and / or liquid enters the exhaust passage through the intake passage and the pump body, and the sucked gas and / or liquid can be smoothly discharged. When the electric vacuum pump is operating, it sucks in soup stock, and when cleaning is required, the electric vacuum pump sucks in clean water to clean the intake passage, the pump body, and the exhaust passage.

[0009] Furthermore, a filter net is provided in the intake chamber, and the intake chamber is detachably connected to the housing.

[0010] Furthermore, the connecting member is a four-way joint, and the piping includes an air intake pipe and an exhaust pipe, The first and second connectors of the four-way joint are connected to the intake chamber via the air guide passage, the third connector is connected to the air intake port of the pump body via the air supply pipe, the fourth connector is connected to the negative pressure detection unit, and the exhaust pipe is connected to the air vent port of the pump body and protrudes to the outside of the housing.

[0011] Furthermore, the negative pressure detection unit includes a negative pressure monitoring pipe and a negative pressure detection switch, and the negative pressure detection switch is connected to the fourth connector of the four-way joint via the negative pressure monitoring pipe.

[0012] Furthermore, the housing includes an upper housing and a lower housing, the upper housing mating with the lower housing to form an internal cavity, and the air bleed unit and the negative pressure detection unit are both disposed within the lower housing.

[0013] The pump further includes a control unit, which includes a PCB control board that is provided in the lower housing, electrically connected to a negative pressure detection switch, and used to control the pump body to stop operating when a preset negative pressure value is detected.

[0014] The light guide frame is fitted onto the control button of the PCB control board, and the switch button is provided on the upper housing and contacts the control button.

[0015] Further, a power supply chamber is further provided in the lower housing, and the PCB control board is electrically connected to the power supply chamber; A battery sheet is provided in the power supply chamber, a battery is housed in the power supply chamber, both electrodes of the battery are in contact with the battery sheet, the battery includes a dry battery and a lithium battery, and the power supply chamber is further provided with a sliding cover.

[0016] Furthermore, a power connector is further provided on the PCB control board, and a hole that fits the power connector is provided on the lower housing.

[0017] Furthermore, a removable decorative case is provided outside the upper housing, and the decorative case and the upper housing are connected by a fastening method. The upper housing and the decorative case are both flattened arc-shaped, and the whole has a mouse shape. [Effects of the Invention]

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] The electric vacuum pump provided by this invention is designed with independent negative pressure detection passages and intake and exhaust passages, which effectively prevent internal contamination and bacterial growth, improving the hygiene and reliability of the product. The installation of a negative pressure detection unit ensures safe use of the electric pump and avoids the problems of poor freshness preservation or container damage caused by negative pressure that is too high or too low.

[0020] Furthermore, by providing a power supply cabin and a power connector on the PCB control board, users can have more flexible power supply options, further improving the practicality of the product. The mouse-like external design reduces the height and center of gravity of the electric vacuum pump, making it easier to hold, lighter, and less likely to tip over. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a structural schematic diagram of an electric vacuum pump according to an embodiment of the present invention; [Figure 2]1 is a plan view of an electric vacuum pump according to an embodiment of the present invention; [Figure 3] FIG. 3 is a cross-sectional view of FIG. 2. [Figure 4] 1 is a schematic view of an electric vacuum pump according to an embodiment of the present invention, without showing the upper housing; FIG. [Figure 5] 1 is a structural diagram of an electric vacuum pump according to an embodiment of the present invention, showing how the battery is removed; [Figure 6] 1 is an exploded view of an electric vacuum pump according to an embodiment of the present invention; [Figure 7] 2 is a schematic diagram illustrating the connection between a bleed unit and a negative pressure detection unit of an electric bleed pump according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0022] Those skilled in the art may formulate new technical solutions by cross-referencing different embodiments based on the teachings of this specification, provided that no technical contradictions arise, and any such modifications shall be deemed to fall within the scope of protection of this patent.

[0023] The following is a more detailed description of the electric vacuum pump of the present invention with reference to the schematic drawings, which illustrate preferred embodiments of the present invention, and it should be understood that those skilled in the art can modify the present invention described herein and still achieve the advantageous effects of the present invention. Therefore, the following description should be understood as being generally known to those skilled in the art and is not intended to limit the present invention.

[0024] In the following paragraphs, the present invention will be more specifically described by way of example with reference to the drawings, from which the advantages and features of the present invention will become more apparent. Note that the drawings are all highly simplified and not to scale, and are used only to easily and clearly illustrate the purpose of the embodiments of the present invention.

[0025] As shown in FIGS. 1 to 7, an embodiment of the present invention provides an electric bleed pump, which includes a housing and an air intake chamber 10, in which a bleed unit, a negative pressure detection unit and an air guide passage 16 are provided.

[0026] Specifically, the intake chamber 10 is attached to the lower part of the housing and communicates with the air guide passage 16. The extraction unit includes a pump body 12, a connecting member, and a pipe. It is used to draw in gas and / or liquid. The connecting member connects to the intake chamber 10 via the air guide passage 16 and to the air inlet of the pump body 12 via the pipe, forming an intake passage. The pipe further connects to the vent of the pump body 12 and protrudes to the outside of the housing, forming an exhaust passage. The negative pressure detection unit communicates with the intake chamber 10 via the connecting member, forming a negative pressure detection passage independent of the intake passage. The independent negative pressure detection passage allows for real-time monitoring of the negative pressure in the intake chamber 10, preventing damage to the freshness-preserving container due to excessive negative pressure. The separate design of the air extraction unit and the negative pressure detection unit does not affect the accuracy of negative pressure detection during the extraction process, improving convenience. The provision of the air guide passage 16 optimizes the air flow path and improves the extraction efficiency.

[0027] The gas and / or liquid enters the exhaust passage through the intake passage and the pump body 12, allowing the gas and / or liquid to be smoothly discharged and preventing accumulation in the intake passage, the pump body 12 and the exhaust passage. When the electric vacuum pump is operating and needs to be cleaned after sucking in soup stock, it draws in clean water to clean the intake passage, the pump body 12 and the exhaust passage, keeping them clean, thereby preventing bacterial growth and product damage and extending the service life.

[0028] In this embodiment, a filter net is provided in the air intake chamber 10, and the air intake chamber 10 is detachably connected to the housing, making it easy for users to regularly clean the air intake chamber 10 and maintaining hygiene and cleanliness. The filter net can be provided as a single layer or a multi-layer structure, and the multi-layer structure can be formed by stacking filter nets with different pore sizes. The provision of a filter net in the air intake chamber 10 can effectively prevent food residue or soup stock from entering the air extraction unit, thereby preventing contamination or corrosion of internal components.

[0029] Furthermore, the filter screen can be fixed inside the air intake chamber 10 by fasteners or screws, and is located at the connection point between the air intake chamber 10 and the air guide passage 16. The detachable connection method includes, but is not limited to, threaded connection, fastener connection, or magnetic attraction connection. In the case of threaded connection, matching internal and external threads are provided at the connection point between the air intake chamber 10 and the housing. In the case of fastener connection, an elastic fastener is provided on the edge of the air intake chamber 10, and a locking groove is provided at the corresponding position on the housing. In the case of magnetic attraction connection, magnets that attract each other are provided at the connection point between the air intake chamber 10 and the housing.

[0030] In this embodiment, the connecting member is a four-way joint 13, which allows for better air distribution. The piping includes an air intake pipe 14 and an exhaust pipe 15. The first and second connectors of the four-way joint 13 are connected to the intake chamber 10 via the air guide passage 16, the third connector is connected to the air intake port of the pump body 12 via the air intake pipe 14, the fourth connector is connected to the negative pressure detection unit, and the exhaust pipe 15 is connected to the air vent port of the pump body 12 and protrudes to the outside of the housing.

[0031] The connecting member uses a four-way joint 13 structure to realize an integrated arrangement of the intake passage, exhaust passage, and negative pressure detection passage. After the gas in the intake chamber 10 enters the four-way joint 13 through the air guide passage 16, it is divided into two passages: one passes through the air supply pipe 14 and enters the pump body 12 to form the intake passage, and the other connects to the negative pressure detection unit to form an independent detection passage. This not only simplifies the pipeline arrangement and improves space utilization, but also improves the efficiency of extraction and the accuracy of negative pressure detection through the optimized design of the air path, thereby avoiding the problems of poor freshness preservation or container damage caused by excessively high or low negative pressure.

[0032] In this embodiment, as shown in FIGS. 4 and 7 , the negative pressure detection unit includes a negative pressure monitoring pipe 4 and a negative pressure detection switch 5. The negative pressure detection switch 5 is connected to the fourth connector of the four-way joint 13 via the negative pressure monitoring pipe 4, forming a negative pressure detection passage independent of the intake passage. This improves the accuracy of negative pressure detection and prevents the accuracy of negative pressure detection from being affected even when gas containing soup stock or other impurities is sucked in, thereby improving the reliability and service life of the electric vacuum pump. By combining the negative pressure monitoring pipe 4 and the negative pressure detection switch 5, the electric vacuum pump can monitor the negative pressure value within the freshness-preserving container in real time. By using the negative pressure monitoring pipe 4 as a connecting passage, the negative pressure detection switch 5 can accurately detect changes in the negative pressure within the container and automatically control the operating state of the electric vacuum pump based on a preset negative pressure value. When the negative pressure inside the freshness-preserving container reaches a preset value, the negative pressure detection switch 5 triggers the electric vacuum pump to stop operation, effectively preventing damage to the freshness-preserving container caused by excessive negative pressure, avoiding the problem of poor freshness preservation caused by insufficient negative pressure, and ensuring the effectiveness of vacuum freshness preservation of food.

[0033] In this embodiment, the housing includes an upper housing 2 and a lower housing 9, the upper housing 2 engages with the lower housing 9 to form an internal cavity, and the air bleeding unit and the negative pressure detection unit are both installed in the lower housing 9.

[0034] In one specific embodiment, the housing can be made of plastic or metal material, preferably ABS plastic to reduce weight.

[0035] In a preferred embodiment, a positioning groove or mounting bracket is provided in the lower housing 9 to fix the positions of the air bleed unit and the negative pressure detection unit.

[0036] In this embodiment, the electric vacuum pump further includes a control unit, which includes a PCB control board 7. The PCB control board 7 is located within the lower housing 9 and is electrically connected to the negative pressure detection switch 5 for controlling the pump body 12 to stop operating when a preset negative pressure value is detected. When the negative pressure detection switch 5 detects that the preset negative pressure has been reached within the container, the PCB control board 7 immediately cuts off the power supply to the pump body 12, which not only avoids damage to the container due to excessive vacuum, but also prevents energy waste.

[0037] In this embodiment, the electric vacuum pump further includes a light guiding frame 6 and a switch button 3, the light guiding frame 6 is fitted onto the control button 3 of the PCB control board 7, and the switch button 3 is provided on the upper housing 2 and is in contact with the control button 3. When a user presses the switch button 3, the light guiding frame 6 can intuitively indicate the operating status of the electric vacuum pump by changing the lamp (for example, turning on or off), making it easier for the user to more clearly understand the operating status of the equipment and improving operating convenience and user experience.

[0038] In this embodiment, as shown in FIG. 5 , a power supply chamber is further provided within the lower housing 9, and the PCB control board 7 is electrically connected to the power supply chamber. A battery sheet 11 is provided within the power supply chamber, and a battery 8 is housed within the power supply chamber. Both electrodes of the battery 8 contact the battery sheet 11. A sliding cover 18 is also provided within the power supply chamber. The provision of the power supply chamber within the lower housing 9 facilitates convenient battery 8 replacement and maintenance. The sliding cover 18 design simplifies battery 8 replacement and avoids the cumbersome nature of conventional screw fastening methods. The direct contact between the battery sheet 11 and the electrodes improves electrical conductivity and reduces contact resistance.

[0039] In a specific embodiment, the battery 8 includes a dry battery and a removable lithium battery, and a suitable battery can be selected according to specific needs.

[0040] In this embodiment, the PCB control board 7 is further provided with a power connector 17, and the lower housing 9 is provided with a hole that is compatible with the power connector 17. Specifically, the power connector 17 may use a standard connector type such as Micro USB, Type-C, or a DC circular hole, and may be used to connect an external power adapter, and preferably, Type-C is selected as the power connector 17.

[0041] The power connector 17 is welded to the power management module of the PCB control board 7 via a lead wire, so that when the built-in battery 8 runs out of power, it can be continuously powered directly from an external power source, eliminating the need to frequently replace the battery 8. The hole size in the lower housing 9 matches the outer diameter of the power connector 17, and a waterproof rubber ring can be provided around the edge of the hole to prevent liquid from seeping in.

[0042] As can be seen from the above, the electric vacuum pump supports power supply from lithium batteries or dry batteries, and can also be powered directly by a power adapter. The three power supply modes can be used independently and do not interfere with each other, thereby providing users with great convenience and freedom of choice.

[0043] In this embodiment, a removable decorative case 1 is provided outside the upper housing 2, and the decorative case 1 and the upper housing 2 are connected via a fastening mechanism. The decorative case 1 is detachably connected to the upper housing 2 using a fastener structure, which can be an elastic fastener or a pressure-type fastener. The decorative case 1 can be made of silica gel, providing a variety of appearance options for the electric vacuum pump. Users can replace different decorative cases 1 according to their personal preferences or home decor style, thereby achieving personal customization. Both the upper housing 2 and the decorative case 1 are flattened and arc-shaped, creating a mouse-like overall shape that conforms to ergonomic principles, making them more comfortable to hold and easier to use. The flattened arc-shaped design lowers the center of gravity of the product, making it less likely to tip over, further improving the product's stability and ease of use.

[0044] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and its equivalents, the present invention also intends to include these modifications and variations. [Explanation of symbols]

[0045] 1 decorative case 2 Upper housing 3 Buttons 4 Negative pressure monitoring pipe 5 Negative pressure detection switch 6 Light guide frame 7 PCB control board 8 batteries 9 Lower housing 10 Intake chamber 11 Battery Sheet 12 Pump body 13 Four-way joint 14 Air supply pipe 15 exhaust pipe 16 Air guide passage 17 Power connector 18 Cover

Claims

1. The engine includes a housing and an intake chamber, and the housing is provided with an air bleed unit, a negative pressure detection unit, and an air guide passage, the intake chamber is attached to a lower portion of the housing and communicates with the air guide passage; the air extraction unit includes a pump body, a connecting member, and a pipe, and is used to suck gas and / or liquid, the connecting member is connected to the intake chamber via the air guide passage, and is connected to an air inlet of the pump body via the pipe, thereby forming an intake passage, and the pipe is further connected to an air vent of the pump body, protrudes to the outside of the housing, and forms an exhaust passage; the negative pressure detection unit communicates with the intake chamber via the connecting member and forms a negative pressure detection passage independent of the intake passage; The gas and / or liquid enters the exhaust passage through the intake passage and the pump body, and the sucked gas and / or liquid can be smoothly discharged, and when the electric vacuum pump is in operation and needs to be cleaned, the electric vacuum pump sucks in clean water to clean the intake passage, the pump body, and the exhaust passage.

2. 2. The electric vacuum pump according to claim 1, wherein a filter net is provided in the intake chamber, and the intake chamber is detachably connected to the housing.

3. the connecting member is a four-way joint, and the piping includes an air intake pipe and an exhaust pipe, 2. The electric vacuum pump according to claim 1, wherein the first and second connectors of the four-way joint are connected to the intake chamber via the air guide passage, the third connector is connected to the air intake port of the pump body via the air supply pipe, the fourth connector is connected to the negative pressure detection unit, and the exhaust pipe is connected to the air vent port of the pump body and protrudes to the outside of the housing.

4. 4. The electric vacuum pump according to claim 3, wherein the negative pressure detection unit includes a negative pressure monitoring pipe and a negative pressure detection switch, and the negative pressure detection switch is connected to a fourth connector of the four-way joint via the negative pressure monitoring pipe.

5. 2. The electric vacuum pump according to claim 1, wherein the housing includes an upper housing and a lower housing, the upper housing engages with the lower housing to form an internal cavity, and the vacuum unit and the negative pressure detection unit are both provided within the lower housing.

6. 6. The electric vacuum pump according to claim 5, further comprising a control unit, the control unit including a PCB control board, the PCB control board being provided in the lower housing, electrically connected to a negative pressure detection switch, and used to control the pump body to stop operation when a preset negative pressure value is detected.

7. 7. The electric vacuum pump according to claim 6, further comprising a light guide frame and a switch button, wherein the light guide frame is fitted onto the control button of the PCB control board, and the switch button is provided on the upper housing and contacts the control button.

8. a power supply chamber is further provided in the lower housing, and the PCB control board is electrically connected to the power supply chamber; 7. The electric vacuum pump according to claim 6, wherein a battery sheet is provided in the power supply chamber, a battery is housed in the power supply chamber, both electrodes of the battery are in contact with the battery sheet, the battery includes a dry battery and a lithium battery, and the power supply chamber is further provided with a sliding cover.

9. 7. The electric vacuum pump according to claim 6, wherein the PCB control board is further provided with a power connector, and the lower housing is provided with a hole that fits the power connector.

10. 6. The electric vacuum pump according to claim 5, wherein a removable decorative case is further provided outside the upper housing, the decorative case and the upper housing are connected by a fastening method, and both the upper housing and the decorative case are flattened arc-shaped, so that the overall pump has a mouth shape.

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