A press-type vacuum pump

Abstract

This utility model discloses a press-type vacuum pump, relating to the field of packaging container technology. It includes a pump body with unidirectional liquid delivery capability, with cavities in both the upper and lower parts of the pump body, and a pump core coaxially connected to the upper and lower cavities. The upper end of the pump core has a downward-extending blind hole along its axial direction, and the lower part of the blind hole has a radially extending liquid inlet hole. A stop ring is fitted around the liquid inlet hole of the pump core, and the stop ring can slide up and down along the pump core's axial direction. The pump core can reciprocate relative to the pump body along its axial direction to control the stop ring to block or open the liquid inlet hole. In the blocked state, the pump core slides downward relative to the pump body, the stop ring is horizontally aligned with the liquid inlet hole, and the upper and lower cavities of the pump body are not connected. In the open state, the pump core slides upward relative to the pump body, the stop ring and the liquid inlet hole are on different horizontal planes, and the upper and lower cavities of the pump body are connected. Combining these two motion states allows for the quantitative pumping of liquid.

Description

Technical Field

[0001] This utility model relates to the field of packaging container technology, specifically a press-type vacuum pump. Background Technology

[0002] In daily life, the packaging containers of liquid preparations such as foundation and skin-protecting and repairing serums used for personal cosmetics usually include a pump head. Users can simply press the pump head to dispense the required liquid from the container.

[0003] However, with the improvement of people's living standards, skincare and repair products are becoming increasingly diversified. In practice, different serums and foundations often need to be used in combination, requiring users to pump liquid from different containers multiple times, resulting in numerous repetitive operations. Furthermore, liquid formulations like foundations and serums require small amounts and precise dosage ratios, which existing large-sized pumps cannot achieve with a single small dispensing. Additionally, differences in pump size and the user's pumping motion when using different dispensing methods for different liquid formulations can lead to significant discrepancies between the actual dispensed amount and the target amount, affecting the effectiveness of foundations or serums with high dosage requirements. Moreover, existing pumps are typically made from a combination of parts made of various materials, necessitating pre-disassembly and sorting of these parts during recycling, indirectly increasing environmental recycling costs. Utility Model Content

[0004] To address the problem mentioned in the background art that liquid preparations such as foundation or serum cannot be conveniently dispensed in small quantities from a container, a low-volume press-type vacuum pump is proposed to achieve the desired effect of dispensing small amounts at a time while maintaining a high liquid volume ratio.

[0005] This utility model discloses a push-button vacuum pump, comprising a pump body with unidirectional liquid delivery capability, with cavities in both the upper and lower parts of the pump body, and a pump core coaxially arranged to connect the upper and lower cavities of the pump body; the upper end of the pump core has a downwardly extending blind hole along the axial direction, and the lower part of the blind hole has a radially extending liquid inlet hole; a stop ring is fitted on the outer side of the liquid inlet hole of the pump core, and the stop ring can slide up and down along the axial direction of the pump core; the pump core can reciprocate relative to the pump body along the axial direction to control the stop ring to block or open the liquid inlet hole; in the blocked state, the pump core slides downward relative to the pump body, the stop ring is horizontally aligned with the liquid inlet hole, and the upper and lower cavities of the pump body are not connected; in the open state, the pump core slides upward relative to the pump body, the stop ring and the liquid inlet hole are located on different horizontal planes, and the upper and lower cavities of the pump body are connected.

[0006] As a further improvement of this utility model, a one-way valve is provided in the lower cavity of the pump body. The one-way valve can open or close the lower cavity of the pump body. When the pressure on the outside of the lower cavity of the pump body is greater than the pressure on the inside, the one-way valve is in the open state.

[0007] As a further improvement of this utility model, the lower end of the stop ring sleeved on the pump core is accommodated in the lower cavity of the pump body, the inner side of the stop ring is in close contact with the sleeved contact surface of the pump core and is sealed to each other, and the outer side of the stop ring is in close contact with the inner wall of the lower cavity of the pump body.

[0008] As a further improvement of this utility model, it also includes a pressure head and an elastic element; the top of the inside of the pressure head is provided with a coaxial interface, and a liquid outlet is horizontally connected to the upper part of the interface; a connecting body is provided on the upper part of the blind hole of the pump core, and the interface and the connecting body are detachably connected; the two ends of the elastic element are respectively connected to the pump core and the pump body, and the elastic element has the ability to drive the pump core to slide upward relative to the pump body.

[0009] As a further improvement of this utility model, the pressure head, pump body, pump core, stop ring, one-way valve and elastic element are all made of the same environmentally friendly and easily recyclable material.

[0010] As a further improvement of this utility model, the lower part of the pump core is symmetrically provided with two connecting blind holes for mixing liquid inlet, the two mixing liquid inlet holes are located at the same horizontal height and on the same horizontal axis; a selection liquid inlet hole is also provided between the two mixing liquid inlet holes, the central axis of the selection liquid inlet hole is located on the symmetrical plane of the two mixing liquid inlet holes.

[0011] As a further improvement of this utility model, a flow control seat is rotatably connected to the bottom of the pump core. The flow control seat has two through-holes, and a connecting pipe extends from the lower side of each of the two holes to connect to the outside of the pump body. The flow control seat has a partition plate at the symmetrical plane of the two mixing inlet holes, which abuts against the lower cavity wall of the pump body. The partition plate divides the lower cavity of the pump body into two independent areas, and each area is equipped with an independent one-way valve. A horizontally extending and expanding connecting plate is provided at the bottom of the pump core. A connecting plate groove is provided on the connecting plate, which is located on the back side of the selected inlet hole.

[0012] As a further improvement of this utility model, the flow control seat has the ability to move up and down relative to the pump body. The partition plate is engaged with the lower cavity wall of the pump body to restrict the relative rotation between the flow control seat and the pump body. The pump core can rotate horizontally coaxially relative to the flow control seat to adjust the vertical relative position of the connecting plate groove and the connecting port. When the two connecting ports are vertically aligned with the outer side of the outlet of a mixing inlet hole, the connecting plate blocks the two connecting ports. When one of the connecting ports is vertically aligned with the outer side of the outlet of the selected inlet hole, the other connecting port is connected to the connecting plate groove.

[0013] As a further improvement of this utility model, it also includes a bottle body, which has two independent volume chambers. A connecting pipe located on the same side of the partition plate and a one-way valve are sealed to one of the independent volume chambers.

[0014] As a further improvement of this utility model, two sealing parts that fit the outer side of the pump core are provided on the lower side of the stop ring. The two sealing parts are symmetrical about the vertical plane containing the central axis of the mixing inlet hole, and one of the sealing parts fits and seals the outer side of the outlet of the selected inlet hole.

[0015] The beneficial effects of this utility model are as follows: 1. The small-sized pump body structure of this utility model can generate negative pressure in the lower chamber of the pump body to draw liquid in one direction through the upward movement of the pump core relative to the pump body, and pump the liquid to the upper chamber of the pump body for use when the pump core moves downward relative to the pump body. The volume of liquid pumped each time is a fixed small amount of liquid, which is convenient for pumping essence-type liquids with small single-use volume. 2. This utility model can achieve the function of taking a single liquid or taking two different liquids in equal amounts at the same time by controlling the rotation angle of the pump core, which is convenient for use scenarios that require liquids to be taken in proportion. 3. All parts of the press-type vacuum pump of this utility model are made of the same easily recyclable material, such as PP material. When recycling, there is no need to disassemble and classify the pump body parts, which facilitates environmentally friendly recycling. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the assembly structure of this utility model; Figure 4 This is a cross-sectional view of the pump discharging liquid according to this utility model. Figure 5 This is a cross-sectional view of the liquid extraction mechanism of this utility model. Figure 6 This is a schematic diagram of the improved assembly structure of this utility model; Figure 7 This is a cross-sectional view of the improved dual-inlet state of this utility model. Figure 8 This is a cross-sectional view of the pump discharging liquid in the improved single-inlet state of this utility model. Figure 9 This is a cross-sectional view of the improved single-inlet state of the present invention when the pumping mechanism is released. Figure 10 This is a schematic diagram of the improved stop ring of this utility model; Figure 11 This is a cross-sectional view of the plane where the inlet is located in the improved single-inlet state of this utility model. Figure 12 This is a schematic diagram of the improved pump core and flow control seat installation structure of this utility model. 1. Pressure head; 11. Connecting interface; 12. Dispensing nozzle; 2. Pump body; 20. Connecting body; 21. Pump core; 210. Blind hole; 211. Inlet hole; 2111. Mixing inlet hole; 2112. Selective inlet hole; 212. Flow control seat; 2121. Connecting port; 2122. Divider plate; 2123. Connecting pipe; 213. Connecting plate; 2131. Connecting plate groove; 22. Stop ring; 221. Sealing part; 222. Flow groove; 23. One-way valve; 24. Core seat; 3. Bottle body; 31. Volume chamber; 4. Spring. Detailed Implementation

[0017] Specific Implementation Example 1: Please refer to the appendix Figure 1 - Appendix Figure 5 A press-type vacuum pump includes a pressure head 1 and a pump body 2 arranged coaxially in sequence, and an elastic element disposed between the pressure head 1 and the pump body 2.

[0018] The inner top of the pressure head 1 is provided with a cylindrical interface 11 along the central axis. The interface 11 is hollow inside. The upper part of the interface 11 is horizontally connected to the liquid outlet 12. The liquid outlet 12 is provided with a pipeline and is connected to the interface 11.

[0019] Pump body 2 is a cylindrical part with hollow cavities at both ends. Pump core 21 is coaxially mounted on pump body 2. A tubular connector 20 is fitted and sealed on the upper part of pump core 21. The upper hole of connector 20 is fitted and locked to the lower part of interface 11. An annular core seat 24 is provided between the lower outer circumferential surface of connector 20 and the middle inner cavity surface of pump body 2. The outer circumferential surface of core seat 24 is locked and locked to the middle inner cavity surface of pump body 2 and keeps sealed. The inner circumferential surface of core seat 24 is sealed and fitted to the outer circumferential surface of connector 20. The assembly of connector 20 and pump core 21 can slide up and down along the inner fitting surface of core seat 24.

[0020] The pump core 21 has a blind hole 210 extending downward from the upper end face along the central axis. At the lower part of the blind hole 210, two collinear liquid inlet holes 211 are opened horizontally and radially to both sides. The upper and lower cavities of the pump body 2 can be connected through the blind hole 210 and the liquid inlet holes 211 of the pump core 21.

[0021] The bottom end of the pump core 21 has a radially expanding boss, which serves as the flow control seat 212 of the pump core 21. The diameter of the flow control seat 212 is smaller than the inner diameter of the lower cavity of the pump body 2, forming an annular gap around the outer periphery of the flow control seat 212.

[0022] An annular stop ring 22 is fitted to the outside of the pump core 21 above the flow control seat 212, and the outer circumferential surface of the stop ring 22 is sealed to the lower inner wall of the pump body 2. The stop ring 22 can slide up and down in the space between the upper end face of the flow control seat 212 and the lower end face of the core seat 24. When the stop ring 22 slides down until the lower end face of the stop ring 22 abuts against the upper end face of the flow control seat 212, the stop ring 22 is horizontally aligned with the inlet hole 211, blocking the outlet ends of the two inlet holes 211. When the stop ring 22 slides up, the outlet ends of the two inlet holes 211 are opened until the upper end face of the stop ring 22 abuts against the lower end face of the core seat 24, at which point the outlet ends of the two inlet holes 211 are fully opened.

[0023] A one-way valve 23 is installed at the bottom of the lower cavity of the pump body 2. When there is no force, the one-way valve 23 blocks the lower cavity of the pump body 2. Only when the pressure in the outer cavity is greater than the pressure in the lower cavity of the pump body 2 will the one-way valve 23 move inward and open due to the pressure difference, so that the lower cavity of the pump body 2 is connected to the outside.

[0024] The elastic element is a spring 4. The upper end of the connecting body 20 has an outwardly flared edge. The upper end of the spring 4 is fixed to the bottom surface of the upper edge of the connecting body 20. The lower end of the spring 4 is fixed to the upper surface of the core seat 24. When there is no external force, the spring 4 drives the combination of the connecting body 20 and the pump core 21 to move upward until the stop ring 22 is clamped and fixed between the lower surface of the core seat 24 and the upper surface of the flow control seat 212.

[0025] All components of the pump body 2 mentioned above are made of PP material. While ensuring that the production materials are environmentally friendly and recyclable, the recycling difficulty is reduced. The pump body parts can be recycled uniformly without additional disassembly and sorting.

[0026] Working principle: Pump-discharged liquid: such as Figure 4 As shown, downward pressure is applied to the pressure head 1 to drive the assembly of the connecting body 20 and the pump core 21 to move downward as a whole, overcoming the elastic force of the spring 4. At this time, the volume of the lower cavity of the pump body 2 gradually shrinks as it moves downward, and the pressure inside the lower cavity of the pump body 2 gradually increases to be greater than the pressure outside the cavity. The one-way valve 23 cannot move inward to open and is in a blocked state. The lower end face of the stop ring 22 is subjected to pressure and slides upward relative to the outer wall of the pump core 21. The outlets of the two liquid inlet holes 211 are opened, and the high pressure in the lower cavity of the pump body 2 can enter from the liquid inlet holes 211 and be released upward from the blind hole 210. If there is liquid in the lower cavity of the pump body 2, the upward transport of liquid can be realized.

[0027] Release the aspirator: as Figure 5As shown, when the pressure applied to the pressure head 1 is removed, the spring 4 drives the assembly of the connecting body 20 and the pump core 21 to move upward. The stop ring 22 slides downward relative to the pump core 21 until the stop ring 22 is horizontally aligned with the liquid inlet 211 and abuts against the upper end face of the flow control seat 212, completely sealing the outlet ends of the two liquid inlet holes 211. The volume of the lower chamber that was compressed when the pump body 2 pumped out liquid increases continuously at this time, the internal pressure decreases, and a pressure difference is generated with the outside. The one-way valve 23 opens inward due to the pressure difference, connecting the lower chamber with the outside. Only after the internal and external pressures are balanced does the one-way valve 23 return to the blocking state. At this time, if the lower chamber of the pump body 2 is set inside the liquid, it can realize the work of unidirectionally drawing liquid from the outside to the inside of the chamber.

[0028] By combining the two independent motion states mentioned above, the target liquid can be pumped quantitatively to the outlet 12 after repeated pumping.

[0029] Specific Implementation Example 2: Please refer to the appendix Figure 6 - Appendix Figure 12 Based on the first specific embodiment, the pump core 21, the flow control seat 212, the stop ring 22 and the lower cavity of the pump body 2 are improved so that the press vacuum pump can pump two liquids in equal amounts at the same time, or the press vacuum pump can select any one of the two pumped liquids for separate pumping.

[0030] like Figures 11-12 As shown, two different inlet holes 211 are opened on the pump core 21. The two inlet holes 211 that are originally opened horizontally and radially with collinear axes are used as mixing inlet holes 2111. A selection inlet hole 2112 is opened at the same height between the two mixing inlet holes 2111. The axis of the selection inlet hole 2112 is perpendicular to the center line of the two mixing inlet holes 2111.

[0031] like Figure 12As shown, a connecting plate 213 extends radially outward from the lower end face of the pump core 21. A portion of the connecting plate 213 is removed from the opposite side of the outlet direction of the inlet hole 2112, forming a connecting plate groove 2131. The flow control seat 212, as a separate movable component, is rotatably connected to the bottom of the pump core 21. The upper edge of the flow control seat 212 has an upward protrusion to form an annular groove on its upper surface. After the flow control seat 212 is rotatably connected to the bottom of the pump core 21, the bottom of the connecting plate 213 is sealed against the surface of the annular groove, allowing for relative rotational movement along the surface of the annular groove. Two symmetrical connection ports 2121 are provided on the flow control seat 212, vertically penetrating it. At the outlets of the two connection ports 2121 on the lower end face of the flow control seat 212, a downwardly extending connecting pipe 2123 is formed, penetrating the bottom of the pump body 2 and connecting to the outside. A partition plate 2122 is vertically installed between the two connecting pipes 2123. The width of the partition plate 2122 is perpendicular to the center line connecting the two connecting ports 2121. The upper end of the partition plate 2122 extends upward to the upper side of the protrusion on the upper edge of the flow control seat 212, and the lower end of the partition plate 2122 penetrates the bottom of the pump body 2. The lower end of the partition plate 2122 extends downward to be flush with the connecting pipes 2123. The partition plate 2122 divides the lower side of the pump body 2 into two independent chambers.

[0032] like Figure 10 and Figure 11 As shown, the lower end of the stop ring 22, on the outer side of the central opening, has an upward-facing recessed interface, forming a double-layer sealing groove structure. This sealing groove structure can be fitted and sealed with the raised structure on the upper edge of the flow control seat 212. A vertical groove passing through the axis is provided at the bottom of the stop ring 22. This vertical groove can fit into the upper part of the partition plate 2122 when the stop ring 22 and the flow control seat 212 are engaged. Two flow grooves 222 are radially formed in the lower inner hole of the stop ring 22, and these flow grooves 222 are arranged in a cross shape with the vertical groove. Four arc-shaped sealing portions 221 are formed between the adjacent intervals of the flow grooves 222 and the vertical grooves, and these sealing portions 221 are sealed and fitted against the outer wall of the pump core 21.

[0033] After the lower chamber of the pump body 2 is separated by the partition plate 2122, each independent chamber is equipped with a one-way valve 23. The one-way valve 23 will only move inward and open when the pressure in the outer chamber is greater than the pressure in the inner chamber.

[0034] Working principle: When pumping equal amounts of two different liquids at the same time, such as Figure 7As shown, the outlets of the two mixing inlet holes 2111 on the pump core 21 are vertically aligned with the two connecting ports 2121 below. The outlets of the two mixing inlet holes 2111 correspond one-to-one with the two flow grooves 222 on the stop ring 22. The connecting plate 213 blocks the upper openings of the two connecting ports 2121 on the flow control seat 212. When the pump is pressed and pumped out as described in Specific Embodiment 1, the sealing groove structure of the stop ring 22 separates from the upper edge protrusion of the flow control seat 212, the volume in the lower cavity of the pump body 2 decreases and the pressure increases, and the different liquids on both sides can enter the mixing inlet holes 2111 through the flow grooves 222 and finally mix and pump out in the blind hole 210. When the pump is released, the sealing groove structure of the stop ring 22 engages with the upper edge of the flow control seat 212, the volume in the lower cavity of the pump body 2 increases and the pressure decreases, and the one-way valve 23 moves inward and opens due to the pressure difference, replenishing the lower cavity of the pump body 2 with liquid.

[0035] When pumping either of two liquids, such as Figure 8 As shown, the rotating pressure head 1 rotates 90 degrees, causing the connecting body 20 and pump core 21 connected below the pressure head 1 to rotate together, as... Figure 11 As shown, the pump core 21 rotates 90 degrees relative to the flow control seat 212 along the central axis. The outlets of the two mixing inlet holes 2111 correspond to the upper part of the partition plate 2122. The inlet hole 2112 is selected to align with one of the flow grooves 222 on the stop ring 22 (the flow grooves 222 on different sides are rotated depending on the target liquid). At this time, both sides of each mixing inlet hole 2111 are sealed by the two sealing parts 221, and the lower side of the mixing inlet hole 2111 is sealed by the upper inner side of the partition plate 2122. That is, neither of the two mixing inlet holes 2111 is connected to the lower cavity of the pump body 2.

[0036] The connecting plate 213 blocks the connection port 2121 vertically below the liquid inlet 2112, and the connecting plate groove 2131 aligns with another connecting port 2121, so that the chamber from which the non-target pump takes liquid is connected to the outer space.

[0037] like Figure 8 As shown, the lower part of the pump body 2 is located in the bottle body 3. With the partition plate 2122 as the boundary, there are two chambers on the left and right, two one-way valves 23 on the left and right, and two connecting pipes 2123 on the left and right are respectively connected to the volume chamber 31(a) or 31(b) on the same side.

[0038] When the pump pumps out liquid, it applies downward pressure to the pressure head 1 to overcome the elastic force of the spring 4, driving the assembly of the connecting body 20 and the pump core 21 to move downward. The sealing groove structure separates from the upper edge protrusion of the flow control seat 212. The right side of the figure is the target liquid area. The volume of the liquid in the lower right cavity of the pump body 2 decreases as it descends, and it enters the blind hole 210 through the right flow groove 222 and the selection inlet hole 2112. Meanwhile, the volume of the liquid in the lower left cavity of the pump body 2 decreases as it descends, and it enters the lower left volume cavity 31(a) through the left connecting port 2121 and the left connecting pipe 2123 to balance the pressure in the cavity.

[0039] When releasing the suction, if Figure 9 As shown, the sealing groove structure of the stop ring 22 fits and seals with the upper edge of the flow control seat 212. The volume of the two independent lower chambers of the pump body 2 increases as the assembly of the connecting body 20 and the pump core 21 moves upward. At this time, the internal pressure of the lower chamber of the pump body 2 decreases, and a pressure difference is generated with the outside. The two one-way valves 23 open inward due to the pressure difference, independently replenishing the corresponding liquid into the two lower chambers of the pump body 2.

[0040] In practical use, different serums or foundations can be filled into different volume chambers 31 in the bottle body 3. Depending on the rotation direction of the pump head 1, it can switch to pump any one liquid individually or pump two liquids in equal amounts at the same time, so as to meet the quantitative mixing requirements of users.

[0041] The above description is only a preferred embodiment of the present utility model and is intended to illustrate the principle and effect of the present utility model, and is not intended to limit the present utility model. All variations, modifications and substitutions within the spirit and principle of the present design are within the protection scope of the present utility model.

Claims

1. A press-type vacuum pump, characterized in that: It includes a pump body (2) with unidirectional liquid delivery capability, and the upper and lower parts of the pump body (2) are provided with cavities, and a pump core (21) is coaxially arranged to connect the upper and lower cavities of the pump body (2). The upper end of the pump core (21) is provided with a downwardly extending blind hole (210) along the axial direction, and the lower part of the blind hole (210) is provided with a radially extending liquid inlet hole (211). A stop ring (22) is sleeved on the outside of the liquid inlet hole (211) of the pump core (21). The stop ring (22) can slide up and down along the axial direction of the pump core (21). The pump core (21) can reciprocate relative to the pump body (2) along the axial direction to control the stop ring (22) to block or open the liquid inlet hole (211). In the blocked state, the pump core (21) slides downward relative to the pump body (2), the stop ring (22) is horizontally aligned with the inlet hole (211), and the upper and lower chambers of the pump body (2) are not connected; In the open state, the pump core (21) slides upward relative to the pump body (2), the stop ring (22) and the inlet hole (211) are located on different horizontal planes, and the upper and lower chambers of the pump body (2) are connected.

2. A press-type vacuum pump according to claim 1, characterized in that: The lower cavity of the pump body (2) is equipped with a check valve (23), which can open or close the lower cavity of the pump body (2); when the pressure on the outside of the lower cavity of the pump body (2) is greater than the pressure on the inside, the check valve (23) is in the open state.

3. A press-type vacuum pump according to claim 1, characterized in that: The lower end of the pump core (21) fitted with the stop ring (22) is housed in the lower cavity of the pump body (2). The inner side of the stop ring (22) is in contact with the pump core (21) and the outer side of the stop ring (22) is in contact with the inner wall of the lower cavity of the pump body (2) and sealed.

4. A press-type vacuum pump according to claim 2, characterized in that: It also includes a pressure head (1) and an elastic element; the pressure head (1) has a coaxial interface (11) at the top inside, and a liquid outlet (12) is horizontally connected to the upper part of the interface (11); a connector (20) is provided on the upper part of the blind hole (210) of the pump core (21), and the interface (11) and the connector (20) are detachably connected; the two ends of the elastic element are respectively connected to the pump core (21) and the pump body (2), and the elastic element has the ability to drive the pump core (21) to slide upward relative to the pump body (2).

5. A press-type vacuum pump according to claim 4, characterized in that: The pressure head (1), pump body (2), pump core (21), stop ring (22), one-way valve (23) and elastic component are all made of the same environmentally friendly and easily recyclable material.

6. A press-type vacuum pump according to claim 1, characterized in that: The pump core (21) has two symmetrically arranged mixing inlet holes (2111) with two connected blind holes (210) at the bottom. The two mixing inlet holes (2111) are located at the same horizontal height and on the same horizontal axis. A selection inlet hole (2112) is also provided between the two mixing inlet holes (2111). The central axis of the selection inlet hole (2112) is located on the symmetrical plane of the two mixing inlet holes (2111).

7. A press-type vacuum pump according to claim 6, characterized in that: The bottom of the pump core (21) is rotatably connected to a flow control seat (212). The flow control seat (212) has two through-holes (2121). The lower side of each of the two through-holes (2121) is extended with a connecting pipe (2123) to connect to the outside of the pump body (2). The flow control seat (212) has a partition plate (2122) at the symmetrical plane of the two mixing inlet holes (2111) that abuts against the lower cavity wall of the pump body (2). The partition plate (2122) divides the lower cavity of the pump body (2) into two independent areas, and each area is equipped with an independent one-way valve (23). The bottom of the pump core (21) is provided with a horizontally extending and expanding connecting plate (213). The connecting plate (213) has a connecting plate groove (2131) on it. The connecting plate groove (2131) is located on the back side of the selection inlet hole (2112).

8. A press-type vacuum pump according to claim 7, characterized in that: The flow control seat (212) has the ability to move up and down relative to the pump body (2). The partition plate (2122) is engaged with the lower cavity wall of the pump body (2) to restrict the relative rotation of the flow control seat (212) and the pump body (2). The pump core (21) can rotate horizontally coaxially relative to the flow control seat (212) to adjust the vertical relative position of the connecting plate groove (2131) and the connecting port (2121). When the two connecting ports (2121) are vertically aligned with the outer side of the outlet of a mixing inlet hole (2111), the connecting plate (213) blocks the two connecting ports (2121). When one of the connecting ports (2121) is vertically aligned with the outer side of the outlet of the selection inlet hole (2112), the other connecting port (2121) is connected to the connecting plate groove (2131).

9. A press-type vacuum pump according to claim 7, characterized in that: It also includes a bottle body (3), which has two independent volume chambers (31), and a connecting pipe (2123) and a one-way valve (23) located on the same side of the partition plate (2122) are sealed to an independent volume chamber (31).

10. A press-type vacuum pump according to claim 7, characterized in that: The lower side of the stop ring (22) is provided with two sealing parts (221) that fit the outside of the pump core (21). The two sealing parts (221) are symmetrical about the vertical plane containing the central axis of the mixing inlet hole (2111), and one of the sealing parts (221) fits and seals the outside of the outlet of the selected inlet hole (2112).

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