Manually operated dual-purpose pump for suction and discharge of liquids and its component arrangement

Abstract

The present invention discloses a manually operated dual-purpose pump for drawing in and discharging liquids and its component arrangement, wherein the dual-purpose pump for drawing in and discharging liquids comprises a liquid storage container, a cover, a pump and a control valve, the liquid storage container serves to hold liquids, a liquid guide hose is arranged in the liquid storage container, the cover is detachably connected to the liquid storage container, the pump is connected to the cover, the pump has a cylinder chamber, a piston is housed in the cylinder chamber and the control valve is arranged horizontally on the cover.By actuating the piston for a back-and-forth movement, air can be pumped out of or into the liquid storage container, thereby pumping the liquid into or out of the liquid storage container via the liquid guide hose.

Description

Field of invention

[0001] The present invention relates to a device for suction and supply of liquids and in particular to a manually operated dual-purpose pump for suction and discharge of liquids and its component arrangement. State of the art

[0002] The dual-purpose pump for suction and discharge of liquids can be used to pump liquids out of / into a container space and comprises a base, a liquid storage container, a pump, and a control valve. The liquid storage container is positioned upright on top of the base. A liquid storage chamber for storing liquids is formed inside the liquid storage container. The liquid storage container is provided with a cover. The cover is connected to a guide hose, a liquid guide hose, and an air guide tube. The guide hose is continuously connected to the liquid guide hose. The guide hose extends to the outside of the liquid storage container. The liquid guide hose is inserted into the liquid storage chamber.the liquid flows into / out of the liquid storage chamber through the guide hose and the liquid guide hose, the air guide tube is continuously connected to the liquid storage chamber, the pump is positioned upright on top of the base, the pump and the liquid storage container are arranged side by side, and a piston, which controls the flow of air into / out of the pump, is arranged inside the pump.

[0003] The control valve is arranged laterally on one side of the pump, the control valve having a long valve body, a valve chamber formed inside the valve body, one side of the valve body being provided with a first air guide opening connected through to the valve chamber, the other side of the valve body being provided with a first air inlet opening and a second air inlet opening, each connected through to the valve chamber, the air guide tube being connected to the first air guide opening, air flowing through the air guide tube between the valve chamber and the liquid storage chamber, the first air supply tube being connected through to the first air inlet opening, air flowing between a first branch chamber and the valve chamber, the second air supply tube being connected through to the second air inlet opening, air flowing between a second branch chamber and the valve chamber.a valve stem is arranged in the valve chamber, one end of the valve stem protrudes from the valve housing and is connected to an actuating section, two separating rings are fitted annularly onto the valve stem and the two separating rings are spaced apart from each other along the axial direction of the valve stem and each bears radially against the side wall of the valve chamber.

[0004] The axial position of the valve stem is changed. Actuating the stem drives the piston into a reciprocating motion. Air in the fluid reservoir is either pumped out or into the fluid reservoir to create a vacuum or pressure, thus determining whether the fluid is pumped into or out of the fluid reservoir via the guide tube and fluid guide hose.

[0005] The first air duct opening is continuously connected to one side of the valve chamber, while the first and second air inlet openings are continuously connected to the other side of the valve chamber. The piping arrangement for providing airflow between the liquid storage tank, the pump, and the control valve is very complex.

[0006] The liquid storage tank and pump are positioned side-by-side on the base. Manufacturers typically opt for a larger-volume liquid storage tank to accommodate a variety of different usage requirements. The overall volume is large, which is not ideal for storage and transportation. If the liquid storage tank develops cracks or leaks, the user will have no choice but to purchase a new dual-purpose pump for drawing and discharging liquids. Even if the pump and control valve of the dual-purpose pump cannot be reused, they will be unusable.

[0007] For use when replacing various automotive fluids, such as engine oils, if only a dual-purpose pump for drawing and draining fluids has been purchased, after pumping out the old fluid, the guide hose, fluid guide hose, and air guide tube must first be removed from the cover. Then, the cover is opened to empty the fluid from the reservoir. After cleaning the inside of the reservoir, new fluid is poured into it. Once the cover is replaced and reconnected to the reservoir, the guide hose, fluid guide hose, and air guide tube are reconnected. Activating the control valve and pump fills the reservoir with the new fluid.This operating procedure is cumbersome, and the fluid exchange process is lengthy. Users who frequently need to exchange fluids typically opt to purchase multiple dual-purpose pumps for both suction and discharge, designed to pump fluids in and out, respectively, in order to reduce fluid exchange time. Furthermore, multiple dual-purpose pumps, each with a large fluid reservoir, take up considerable storage space. Object of the invention

[0008] The main objective of the present invention is to provide a manually operated dual-purpose pump for drawing in and discharging liquids and its component arrangement.

[0009] The following technical solutions are employed in the present invention to solve the aforementioned problem: a liquid storage container, wherein a liquid storage space is formed inside the liquid storage container, a container opening is provided at the upper edge of the liquid storage container, the liquid storage space transitions into the container opening, and a liquid guide hose is inserted into the liquid storage space and protrudes from the outside of the liquid storage container to guide a liquid into / out of the liquid storage space; a cover which is detachably connected to the liquid storage container and seals the container opening, wherein the cover has a first side and a second side, the first side and the second side are opposite each other along the thickness direction of the cover, the first side faces the liquid storage space, the cover is provided with an air supply channel, a first air supply pipe, a second air supply pipe and a third air supply pipe are each connected to the first side, the first air supply pipe is continuously connected to the air supply channel and the second air supply pipe is continuously connected to the liquid storage space; a pump connected to the cover and located on the first side, wherein a cylinder chamber is formed inside the pump, a piston enabling the flow of air is arranged in the cylinder chamber, the cylinder chamber is divided by the piston into a first branch chamber and a second branch chamber, the piston is connected to a shaft, the shaft protrudes from the cover and is connected to a handle, the piston can be moved back and forth along the cylinder chamber by actuation, the air flows unidirectionally from the first branch chamber through the piston and into the second branch chamber by changing the volumes of the first and second branch chambers, the first branch chamber is continuously connected to the air guide duct and the second branch chamber is continuously connected to the third air supply pipe; and A control valve arranged horizontally on the second side, comprising a tubular valve body and a valve stem, wherein the valve body is connected to the cover, a valve chamber is formed inside the valve body, the valve chamber is continuously connected to the outside space via two ends of the valve body, the valve body is provided with an annular wall, a first channel, a second channel and a third channel, the annular wall surrounds the valve chamber in a radial direction, and the first channel, the second channel and the third channel each extend to the same side of the annular wall and are continuously connected to the valve chamber, wherein the first channel, the second channel, the third channel and two ends of the valve chamber are spaced apart from each other along the axial direction of the valve body, and the second channel is located between the first channel and the third channel.the first channel is continuously connected to the first air supply pipe, the second channel is continuously connected to the second air supply pipe, and the third channel is continuously connected to the third air supply pipe; wherein the valve stem is arranged in the valve chamber such that it is displaceable back and forth along the axial direction, the two axial ends of the valve stem extending to the outside of the valve housing to form a first actuating section and a second actuating section, the valve stem radially surrounding a first leak-proof ring, a second leak-proof ring, and a third leak-proof ring, the first leak-proof ring being located between the first channel and the first actuating section, whereby the first leak-proof ring selectively abuts the ring wall and thus the first channel is selectively continuously connected through the valve chamber to the outside of the valve housing.wherein the second leak-proof ring is located between the first channel and the third channel and the second leak-proof ring rests against the ring wall, whereby the second channel is selectively connected through the valve chamber to either the first channel or the third channel, wherein the third leak-proof ring is located between the third channel and the second actuating section, whereby the third leak-proof ring is selectively resting against the ring wall and thus the third channel is selectively connected through the valve chamber to the outside of the valve housing.

[0010] The main effect and advantage of the present invention is that the first, second, and third channels each extend to the same side of the annular wall and are continuously connected to the valve chamber. This simplifies the airflow path between the cover, the pump, and the control valve. The pump and the control valve are each connected to the cover. The entire pipe configuration is simplified and exhibits low complexity. The cover, the pump, the control valve, the first air supply pipe, the second air supply pipe, and the third air supply pipe form a single-piece component assembly. This component assembly can be detached from the fluid reservoir to facilitate cleaning or replacement of the fluid reservoir. Fluid replacement is also straightforward.Depending on requirements, the component arrangement can be connected to a liquid storage container with a corresponding volume, thereby reducing the space required for storage or transport. Brief description of the drawings Fig. Figure 1 shows a perspective view according to a preferred embodiment of the present invention; Fig. Figure 2 shows a perspective view according to the preferred embodiment of the present invention from a different perspective, in which the liquid storage container is removed; Fig. 3 shows a top view according to the preferred embodiment of the present invention; Fig. Figure 4 shows a section view along the section line 4-4 in Fig. 3 according to the preferred embodiment of the present invention; Fig. Figure 5 shows a partial section view along the section line 5-5 in Fig. 3 according to the preferred embodiment of the present invention; Fig. Figure 6 shows an enlarged partial sectional view of the control valve according to Fig. 5; Fig. Figure 7 shows a partial section view along section line 7-7 in Fig. 4 according to the preferred embodiment of the present invention; Fig. Figure 8 shows a sectional view according to the preferred embodiment of the present invention, in which the piston is moved back and forth by actuating the handle; Fig. Figure 9 shows a partial sectional view of the control valve according to the preferred embodiment of the present invention, in which the valve stem is moved to a different position; Fig. Figure 10 shows a partial sectional view of the control valve according to a varied embodiment of the present invention. Detailed description of the exemplary implementations

[0011] It will be directed to the Fig. Reference is made to Figures 1 to 9, which show a preferred embodiment of the dual-purpose pump for drawing in and discharging liquids. It comprises a liquid storage container 10, a cover 2, a pump 30, and a control valve 40, wherein a liquid storage chamber 11 is formed inside the liquid storage container 10, a container opening 12 is provided at the upper edge of the liquid storage container 10, the liquid storage chamber 11 transitions into the container opening 12, and a liquid guide hose 13 is inserted into the liquid storage chamber 11 and protrudes from the outside of the liquid storage container 10 to draw a liquid 90 into / out of the liquid storage chamber 11.

[0012] The cover 20 is detachably connected to the liquid storage container 10 and seals the container opening 12. The cover 20 has a first side 21 and a second side 22. The first side 21 and the second side 22 are opposite each other along the thickness direction of the cover 20. The first side 21 faces the liquid storage chamber 11. The cover 20 is provided with an air duct 23. A first air supply pipe 51, a second air supply pipe 52, and a third air supply pipe 53 are each connected to the first side 21. The first air supply pipe 51 is continuously connected to the air duct 23, and the second air supply pipe 52 is continuously connected to the liquid storage chamber 11. In particular, the second air supply pipe 52 is optionally passed through two through-holes 54 to be continuously connected to the liquid storage chamber 11.

[0013] The pump 30 is connected to the cover 20 and arranged on the first side 21, wherein a cylinder chamber 32 is formed inside the pump 30, a piston 34 enabling the flow of air is arranged in the cylinder chamber 32, the cylinder chamber 32 is divided by the piston 34 into a first branch chamber 322 and a second branch chamber 324, the air flows unidirectionally from the first branch chamber 322 through the piston 34 and into the second branch chamber 324, the piston 34 is connected to a shaft 36, the shaft 36 projects from the cover 20 and is connected to a handle 38, the piston 34 can be moved back and forth along the cylinder chamber 32 by actuating the handle 38, the air flows unidirectionally from the first branch chamber 322 through the piston by changing the volumes of the first branch chamber 322 and the second branch chamber 324 34 flows and into the second branch chamber 324,The first branch chamber 322 is continuously connected to the air guide duct 23, and the second branch chamber 324 is continuously connected to the third air supply pipe 53. The piston 34, which enables the unidirectional flow of air, is part of the prior art known to a person skilled in the art in the field of the present invention, which is why the specific structure of the piston 34 is not described in detail here.

[0014] The control valve 40 is arranged horizontally on the second side 22 and comprises a tubular valve housing 41 and a valve stem 42, wherein the valve housing 41 is connected to the cover 20, a valve chamber 43 is formed inside the valve housing 41, the valve chamber 43 is continuously connected to the outside space via two ends of the valve housing 41, the valve housing 41 is provided with an annular wall 44, a first channel 411, a second channel 412 and a third channel 413, the annular wall 44 surrounds the valve chamber 43 in a radial direction and the first channel 411, the second channel 412 and the third channel 413 each extend to the same side of the annular wall 44 and are continuously connected to the valve chamber 43. Specifically, the first channel 411, the second channel 412 and the third channel 413 all extend selectively towards the ring wall 44, which faces the liquid storage chamber 11.The first channel 411, the second channel 412, the third channel 413 and two ends of the valve chamber 43 are spaced apart from each other along the axial direction of the valve housing 41, wherein the second channel 412 is located between the first channel 411 and the third channel 413, the first channel 411 is continuously connected to the first air supply pipe 51, the second channel 412 is continuously connected to the second air supply pipe 52 and the third channel 413 is continuously connected to the third air supply pipe 53.

[0015] The valve stem 42 is arranged in the valve chamber 43 such that it is axially displaceable. The two axial ends of the valve stem 42 extend to the outside of the valve housing 41 to form a first actuating section 422 and a second actuating section 424. By selectively pressing either the first actuating section 422 or the second actuating section 424, the valve stem 42 can be moved axially. The valve stem 42 radially surrounds a first leak-proof ring 61, a second leak-proof ring 62, and a third leak-proof ring 63, with the first leak-proof ring 61 being located between the first channel 411 and the first actuating section 422.Accordingly, the first leak-proof ring 61 can optionally abut the ring wall 44, thereby selectively connecting the first channel 411 through the valve chamber 43 to the outer space of the valve housing 41. The second leak-proof ring 62 is located between the first channel 411 and the third channel 413, with the radial outer circumference of the second leak-proof ring 62 abutting the ring wall 44, thereby selectively connecting the second channel 412 through the valve chamber 43 to either the first channel 411 or the third channel 413. The third leak-proof ring 63 is located between the third channel 413 and the second actuating section 424. Accordingly, the third leak-proof ring 63 can optionally abut the ring wall 44, thereby selectively connecting the third channel 413 through the valve chamber 43 to the outer space of the valve housing 41.

[0016] If the valve stem 42 is in the Fig. In the position shown in Figure 6, the second leak-proof ring 62 is located between the second channel 412 and the third channel 413, wherein the first channel 411 is continuously connected to the second channel 412 through the valve chamber 43, the second channel 412 is not continuously connected to the third channel 413 through the valve chamber 43, the first leak-proof ring 61 is inserted into the valve chamber 43 and rests radially against the ring wall 44 to form an airtight seal, the valve chamber 43 is not continuously connected to the outside environment through the end of the valve housing 41 facing the first actuating section 422, the third leak-proof ring 63 is located outside the area of ​​the ring wall 44, the third leak-proof ring 63 does not rest against the ring wall 44, the third channel 413 through the valve chamber 43 and the end of the valve housing facing the second actuating section 424 41 is continuously connected to the outside environment,The liquid storage chamber 11 is continuously connected to the first branch chamber 322 via the second air supply pipe 52, the second channel 412, the valve chamber 43, the first channel 411, the first air supply pipe 51 and the air guide channel 23, and the second branch chamber 324 is continuously connected to the outside environment via the third air supply pipe 53 and the valve chamber 43.

[0017] It will be on Fig. 5. By actuating the handle 38, the piston 34 can be moved back and forth, thereby continuously changing the volumes of the first branch chamber 322 and the second branch chamber 324, whereby air is pumped out of the liquid storage chamber 11 and into the first branch chamber 322, the air in the first branch chamber 322 being drawn unidirectionally into the second branch chamber 324 via the piston 34 and then discharged to the outside environment through the third air supply tube 53 and the valve chamber 43. The liquid storage chamber 11 is under negative pressure, which draws the external liquid 90 into the liquid storage chamber 11 through the liquid guide tube 13.

[0018] If the valve stem 42 is in the Fig. In the position shown in Figure 9, the second leak-proof ring 62 is located between the first channel 411 and the second channel 412, wherein the second channel 412 is continuously connected to the third channel 413 through the valve chamber 43, the first channel 411 is not continuously connected to the second channel 412 through the valve chamber 43, the third leak-proof ring 63 is inserted into the valve chamber 43 and rests radially against the ring wall 44 to form an airtight seal, the valve chamber 43 is not continuously connected to the outside environment through the end of the valve housing 41 facing the second actuating section 424, the first leak-proof ring 61 is located outside the area of ​​the ring wall 44, the first leak-proof ring 61 does not rest against the ring wall 44, the first channel 411 through the valve chamber 43 and the end of the valve housing facing the first actuating section 422 41 is continuously connected to the outside environment,The liquid storage chamber 11 is continuously connected to the second branch chamber 324 via the second air supply pipe 52, the second channel 412, the valve chamber 43, the third channel 413 and the third air supply pipe 53, and the first branch chamber 322 is continuously connected to the outside environment via the air supply channel 23, the first air supply pipe 51, the first channel 411 and the valve chamber 43.

[0019] By actuating the handle 38, the piston 34 can be moved back and forth, thereby continuously changing the volumes of the first branch chamber 322 and the second branch chamber 324. Air is drawn in from the outside environment and flows into the valve chamber 43 via the end of the valve housing 4 facing the first actuating section 422, and then further into the first branch chamber 322. The air in the first branch chamber 322 flows unidirectionally via the piston 34 into the second branch chamber 324 and is then discharged through the third air supply tube 53, the valve chamber 43, and the second air supply tube 52 into the liquid storage chamber 11. The liquid storage chamber 11 is pressurized, forcing the liquid 90 stored in the liquid storage chamber 11 to flow outwards through the liquid guide tube 13.

[0020] By selectively pressing the first actuating section 422 or the second actuating section 424 and changing the axial positioning of the valve stem 42, when actuating the handle 38 to cause a back-and-forth movement of the piston 34, the air in the liquid storage chamber 11 can be pumped out or air can be pumped into the liquid storage chamber 11, thus placing the liquid storage chamber 11 in a negative pressure or positive pressure state, in order to determine whether a liquid 90 is drawn into the liquid storage chamber 11 through the liquid guide tube 13 or the liquid 90 in the liquid storage chamber 11 is pumped outwards.

[0021] The first channel 411, the second channel 412, and the third channel 413 each extend to the same side of the annular wall 44. This simplifies the airflow path between the cover 20, the pump 30, and the control valve 40. The pump 30 and the control valve 40 are each connected to the cover 20. The first air supply pipe 51, the second air supply pipe 52, and the third air supply pipe 53 can each be connected to the first side 21, thus simplifying the overall pipe configuration and reducing complexity. The cover 20, the pump 30, the control valve 40, the first air supply pipe 51, the second air supply pipe 52, and the third air supply pipe 53 form a single-piece component assembly. Once the liquid storage tank 10 has been separated from the cover 20, it can be easily cleaned.There is no need to dismantle the pump 30 or the control valve 40, nor the first air supply pipe 51, the second air supply pipe 52 or the third air supply pipe 53.

[0022] The component arrangement can be configured so that, depending on the different usage requirements, the liquid storage container 10 has a suitable volume to form a dual-purpose pump for drawing in and discharging liquids. The user does not need to purchase a dual-purpose pump for drawing in and discharging liquids with a large liquid storage container 10, which simplifies storage and transport. If the liquid storage container 10 develops cracks or leaks, only a replacement liquid storage container 10, which is connectable to the cover 20, needs to be selected. The cover 20, pump 30, control valve 40, first air supply tube 51, second air supply tube 52, and third air supply tube 53 can still be used.

[0023] The user can have several liquid storage containers 10 available that are suitable for the component assembly. When the liquid 90 to be replaced is drawn in, the component assembly is equipped with one of the liquid storage containers 10. When a new liquid 90 is to be poured into the container space described in the prior art, the component assembly is removed and then combined with another liquid storage container 10, which contains the liquid 90. Replacing the liquid 90 is simple.

[0024] The distance between the first leak-proof ring 61 and the third leak-proof ring 63 is greater than the distance between the first channel 411 and the third channel 413.

[0025] The first actuating section 422 and the second actuating section 424 are limited by two ends of the valve housing 41 in order to limit the axial displacement stroke of the valve stem 42.

[0026] One axial end of the valve housing 41 is defined as the first end 45 and the other end as the second end 46, wherein the first end 45 is located between the first channel 411 and the first actuating section 422 and is opposite the first actuating section 422, the second end 46 is located between the third channel 413 and the second actuating section 424 and is opposite the second actuating section 424, and the first end 45, the first channel 411, the second channel 412, the third channel 413 and the second end 46 are arranged successively spaced apart along the axial direction of the valve housing 41.

[0027] Inside the valve housing 41, a first subchamber 47 and a second subchamber 48 are formed, each continuously connected to the valve chamber 43, wherein the first subchamber 47 is located between the first channel 411 and the first end 45 and extends to the first end 45, the second subchamber 48 is located between the third channel 413 and the second end 46 and extends to the second end 46, and the inner diameters of the first subchamber 47 and the second subchamber 48 are each larger than the outer diameters of the first leak-proof ring 61 and the third leak-proof ring 63 in the free state, so that when the first leak-proof ring 61 is removed from the valve chamber 43, the first leak-proof ring 61 is inserted into the first subchamber 47 and thus the valve chamber 43 can be continuously connected to the outside environment via the first subchamber 47 and,when the third leak-proof ring 63 is removed from the valve chamber 43, the third leak-proof ring 63 is inserted into the second sub-chamber 48 and thus the valve chamber 43 can be continuously connected to the outside environment via the second sub-chamber 48.

[0028] It will be on Fig. Reference is made to Section 10. The varied embodiment is based on the preferred embodiment. The main difference between the varied embodiment and the preferred embodiment is that the valve chamber 43 extends to the first end 45 and second end 46, and the valve housing 41 does not have a first sub-chamber 47 and a second sub-chamber 48 as in the preferred embodiment.

Claims

[1] A manually operated dual-purpose pump for sucking in and discharging liquids, comprising: a liquid storage container, wherein a liquid storage space is formed inside the liquid storage container, a container opening is provided at the upper edge of the liquid storage container, the liquid storage space merges into the container opening, and a liquid guide tube is inserted into the liquid storage space and protrudes from the outside of the liquid storage container to guide a liquid into / out of the liquid storage space; a cover detachably connected to the liquid storage container and sealing the container opening, the cover having a first side and a second side, the first side and the second side opposite each other along the thickness direction of the cover, the first side facing the liquid storage space, the cover being provided with an air guide duct, a first air supply pipe, a second air supply pipe, and a third air supply pipe being each connected to the first side, the first air supply pipe being continuously connected to the air guide duct, and the second air supply pipe being continuously connected to the liquid storage space; a pump connected to the cover and arranged on the first side, wherein a cylinder chamber is formed inside the pump, a piston allowing air to flow through is arranged in the cylinder chamber, the cylinder chamber is divided by the piston into a first branch chamber and a second branch chamber, the piston is connected to a shaft, the shaft protrudes from the cover and is connected to a handle, the piston is movable back and forth along the cylinder chamber by actuation, the air flows unidirectionally from the first branch chamber through the piston and into the second branch chamber by changing the volumes of the first branch chamber and the second branch chamber, the first branch chamber is continuously connected to the air guide channel, and the second branch chamber is continuously connected to the third air supply pipe; and a control valve arranged horizontally on the second side and comprising a tubular valve housing and a valve stem, wherein the valve housing is connected to the cover, a valve chamber is formed inside the valve housing, the valve chamber is continuously connected to the outside via two ends of the valve housing, the valve housing is provided with an annular wall, a first channel, a second channel, and a third channel, the annular wall annularly surrounds the valve chamber in the radial direction, and the first channel, the second channel, and the third channel each extend to the same side of the annular wall and are continuously connected to the valve chamber, wherein the first channel, the second channel, the third channel, and two ends of the valve chamber are arranged spaced apart from each other along the axial direction of the valve housing, the second channel being located between the first channel and the third channel,the first channel is continuously connected to the first air supply pipe, the second channel is continuously connected to the second air supply pipe, and the third channel is continuously connected to the third air supply pipe; wherein the valve stem is arranged in the valve chamber so as to be displaceable back and forth along the axial direction, wherein the two axial ends of the valve stem extend to the outside of the valve housing to form a first actuating portion and a second actuating portion, wherein the valve stem radially surrounds a first leak-proof ring, a second leak-proof ring, and a third leak-proof ring, wherein the first leak-proof ring is located between the first channel and the first actuating portion, whereby the first leak-proof ring selectively abuts the ring wall and thus the first channel is selectively continuously connected through the valve chamber to the outside of the valve housing, wherein the second leak-proof ring is located between the first channel and the third channel and the second leak-proof ring abuts the ring wall,whereby the second channel is selectively continuously connected to the first channel or the third channel through the valve chamber, wherein the third leak-proof ring is located between the third channel and the second actuating section, whereby the third leak-proof ring selectively abuts the ring wall and thus the third channel is selectively continuously connected to the exterior of the valve housing through the valve chamber. [2] A manually operated dual-purpose pump for sucking and discharging liquids according to claim 1, wherein the distance between the first leak-proof ring and the third leak-proof ring is greater than the distance between the first channel and the third channel. [3] A manually operated dual-purpose pump for suction and discharge of liquids according to claim 1, wherein the two ends of the valve housing provided along the axial direction are respectively defined as a first end and a second end, the first end being located between the first channel and the first operating portion, and the second end being located between the third channel and the second operating portion, wherein a first sub-space and a second sub-space, each continuously connected to the valve chamber, are formed inside the valve housing, the first sub-space being located between the first channel and the first end and extending to the first end,the second subspace is located between the third channel and the second end and extends to the second end, and the inner diameters of the first subspace and the second subspace are each larger than the outer diameters of the first leak-proof ring and the third leak-proof ring in the free state. [4] A component assembly for the manually operated dual-purpose pump for sucking and discharging liquids, the component assembly being for cooperating with a liquid storage container to form the manually operated dual-purpose pump for sucking and discharging liquids; wherein the component arrangement comprises: a cover that serves to connect to the liquid storage container. wherein the cover has a first side and a second side, the first side and the second side are opposite each other along the thickness direction of the cover, the first side faces the liquid storage space, the cover is provided with an air guide channel, a first air supply pipe, a second air supply pipe and a third air supply pipe are each connected to the first side, the first air supply pipe is continuously connected to the air guide channel and the second air supply pipe is continuously connected to the liquid storage space; a pump connected to the cover and arranged on the first side, wherein a cylinder chamber is formed inside the pump, a piston allowing air to flow through is arranged in the cylinder chamber, the cylinder chamber is divided by the piston into a first branch chamber and a second branch chamber, the piston is connected to a shaft, the shaft protrudes from the cover and is connected to a handle, the piston is movable back and forth along the cylinder chamber by actuation, the air flows unidirectionally from the first branch chamber through the piston and into the second branch chamber by changing the volumes of the first branch chamber and the second branch chamber, the first branch chamber is continuously connected to the air guide channel, and the second branch chamber is continuously connected to the third air supply pipe; and a control valve arranged horizontally on the second side and comprising a tubular valve housing and a valve stem, wherein the valve housing is connected to the cover, a valve chamber is formed inside the valve housing, the valve chamber is continuously connected to the outside via two ends of the valve housing, the valve housing is provided with an annular wall, a first channel, a second channel, and a third channel, the annular wall annularly surrounds the valve chamber in the radial direction, and the first channel, the second channel, and the third channel each extend to the same side of the annular wall and are continuously connected to the valve chamber, wherein the first channel, the second channel, the third channel, and two ends of the valve chamber are arranged spaced apart from each other along the axial direction of the valve housing, the second channel being located between the first channel and the third channel,the first channel is continuously connected to the first air supply pipe, the second channel is continuously connected to the second air supply pipe, and the third channel is continuously connected to the third air supply pipe; wherein the valve stem is arranged in the valve chamber so as to be displaceable back and forth along the axial direction, wherein the two axial ends of the valve stem extend to the outside of the valve housing to form a first actuating portion and a second actuating portion, wherein the valve stem radially surrounds a first leak-proof ring, a second leak-proof ring, and a third leak-proof ring, wherein the first leak-proof ring is located between the first channel and the first actuating portion, whereby the first leak-proof ring selectively abuts the ring wall and thus the first channel is selectively continuously connected through the valve chamber to the outside of the valve housing, wherein the second leak-proof ring is located between the first channel and the third channel and the second leak-proof ring abuts the ring wall,whereby the second channel is selectively continuously connected to the first channel or the third channel through the valve chamber, wherein the third leak-proof ring is located between the third channel and the second actuating section, whereby the third leak-proof ring selectively abuts the ring wall and thus the third channel is selectively continuously connected to the exterior of the valve housing through the valve chamber. [5] A manually operated dual-purpose pump for sucking and discharging liquids according to claim 4, wherein the distance between the first leak-proof ring and the third leak-proof ring is greater than the distance between the first channel and the third channel. [6] A manually operated dual-purpose pump for suction and discharge of liquids according to claim 4, wherein the two ends of the valve housing provided along the axial direction are respectively defined as a first end and a second end, the first end being located between the first channel and the first operating portion, and the second end being located between the third channel and the second operating portion, wherein a first sub-space and a second sub-space, each continuously connected to the valve chamber, are formed inside the valve housing, the first sub-space being located between the first channel and the first end and extending to the first end,the second subspace is located between the third channel and the second end and extends to the second end, and the inner diameters of the first subspace and the second subspace are each larger than the outer diameters of the first leak-proof ring and the third leak-proof ring in the free state.

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