Press pump

Abstract

A press pump, comprising a body, a pump plunger mechanism and at least two piston members. The body is provided with a pump cavity and a check valve structure, wherein a liquid suction hole is formed in the lower end of the pump cavity; and the check valve structure is arranged at the liquid suction hole and limits a fluid to a unidirectional entrance to the pump cavity through the liquid suction hole. The body is provided with a partition plate portion, which divides the pump cavity into at least two piston cavities arranged in the vertical direction. The pump plunger mechanism is vertically movably arranged in the body and penetrates both the piston cavities, and the pump plunger mechanism is provided with a liquid output channel. The at least two piston members are vertically slidably arranged in the piston cavities in a one-to-one correspondence manner, and the piston members can move with the pump plunger mechanism; the parts of the piston cavities located below the corresponding piston members are defined as liquid storage cavities; both the liquid storage cavities are in communication with each other; and one end of the liquid output channel is in communication with the liquid storage cavities.

Description

A compression pump Technical Field

[0001] The present invention relates to the field of compression pumps, and in particular to a compression pump. Background Art

[0002] Bottled liquids are commonly dispensed in a quantitative manner using a pump. Existing pumps include a main body, a pump column mechanism, and a piston. The main body defines a pump chamber, the bottom of which is provided with a liquid suction port and a one-way valve structure. The piston is vertically slidably mounted within the pump chamber. The pump column mechanism is provided with a liquid outlet channel. The pump column mechanism extends vertically through the pump chamber and drives the piston member up and down. The portion of the pump chamber below the piston member serves as a liquid reservoir. When the pump column mechanism rises, it drives the piston member up. Under the influence of atmospheric pressure, liquid enters the liquid reservoir through the one-way valve structure. When the pump column mechanism descends, it drives the piston member down, squeezing the liquid in the liquid reservoir through the outlet channel and ultimately discharging quantitatively from a push button at the top of the pump column mechanism. Existing pumps like these only deliver a small amount of liquid per press. When using a large amount of liquid, multiple presses are required, making them inconvenient to use, particularly in environments where the height of the bottle placement area is limited and operating space is limited.

[0003] Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a compression pump that can increase the amount of liquid discharged during a single compression.

[0005] According to an embodiment of the present invention, a press pump includes a main body, a pump column mechanism and at least two piston members. The main body is provided with a pump chamber and a one-way valve structure. The lower end of the pump chamber is provided with a liquid suction hole. The one-way valve structure is provided at the liquid suction hole and limits the fluid from entering the pump chamber from the liquid suction hole in one direction. The main body is provided with a partition portion, and the partition portion divides the pump chamber into at least two piston chambers arranged vertically; the pump column mechanism is movably provided on the main body along the vertical direction and passes through all the piston chambers, and the pump column mechanism is provided with a liquid outlet channel; at least two piston members are provided in the piston chamber in a one-to-one vertical sliding manner, and the piston members can move with the pump column mechanism. The part of the piston chamber located on the lower side of the corresponding piston member is defined as a liquid storage chamber, and all the liquid storage chambers are connected to each other, and one end of the liquid outlet channel is connected to the liquid storage chamber.

[0006] The pressing pump according to the embodiment of the present invention has at least the following beneficial effects: when the pressing pump is pressed, the pump column mechanism descends, driving all the piston parts to descend. At this time, the volume of all the liquid storage chambers is compressed, and the liquid in the liquid storage chambers is eventually squeezed out through the liquid outlet channel, thereby increasing the liquid output during a single press; when the lifting column rises and resets, the liquid enters all the interconnected liquid storage chambers through the one-way valve structure for storage, waiting for the next press.

[0007] According to some embodiments of the present invention, the pump column mechanism includes a connecting rod structure arranged vertically, the connecting rod structure is provided with a connecting channel, the connecting channel connects two adjacent liquid storage chambers, and the connecting rod structure is connected to the piston member.

[0008] According to some embodiments of the present invention, the connecting rod structure includes a liquid outlet column and a connecting pipe, the liquid outlet column is provided with the liquid outlet channel, the connecting pipe is provided with the communicating channel, and the upper end of the connecting pipe is connected to the lower end of the liquid outlet column.

[0009] According to some embodiments of the present invention, the main body is provided with two piston chambers, the upper end of the connecting tube is located in the upper liquid storage chamber, and the lower end of the connecting tube passes through to the lower side wall of the piston member located below.

[0010] According to some embodiments of the present invention, the connecting pipe and the piston member located below are an integrally formed structure.

[0011] According to some embodiments of the present invention, the main body includes at least two cylinder members arranged vertically, the cylinder members are provided with the piston chamber, the upper end of the cylinder members is provided with an opening, two adjacent cylinder members are connected, the bottom wall of the cylinder members forms the partition part, and the partition part is provided with a clearance hole for making way for the pump column mechanism.

[0012] According to some embodiments of the present invention, the relief hole is a tapered hole, and the hole wall of the small end of the tapered hole is in sealing contact with the pump column mechanism.

[0013] According to some embodiments of the present invention, at least a portion of the lower periphery of the piston member is provided with a chamfered portion.

[0014] According to some embodiments of the present invention, one end of the liquid outlet channel is connected to the uppermost liquid storage cavity.

[0015] According to some embodiments of the present invention, the pump column mechanism includes a liquid outlet column, the liquid outlet column is provided with the liquid outlet channel, the pump column mechanism also includes a main column, the liquid outlet column is passed through the main column, the liquid outlet column is provided with a lower pushing portion, the main column is provided with an upper pushing portion surrounding the outer side of the liquid outlet column, the topmost piston member is located between the upper pushing portion and the lower pushing portion, the topmost piston member and the upper pushing portion are sealed and slidably matched with each other, when the pump column mechanism rises, the topmost piston member can descend relative to the liquid outlet column to seal and cooperate with the lower pushing portion, so that the piston member, the upper pushing portion and the liquid outlet column are enclosed to form a back suction chamber, the volume of the back suction chamber increases as the pump column mechanism rises; when the pump column mechanism descends, the piston member separates from the lower pushing portion and allows the liquid in the topmost liquid storage chamber to enter the liquid outlet channel.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments with reference to the following drawings, in which:

[0018] FIG1 is a schematic cross-sectional view of a pressing pump according to an embodiment of the present invention during pressing;

[0019] FIG2 is a partial enlarged schematic diagram of point A in FIG1 according to an embodiment of the present invention;

[0020] FIG3 is a cross-sectional view of the pressing pump according to the embodiment of the present invention when it is rising and resetting;

[0021] FIG4 is a partial enlarged schematic diagram of point B in FIG3 according to an embodiment of the present invention;

[0022] FIG5 is an exploded schematic diagram of a body according to an embodiment of the present invention;

[0023] FIG6 is an exploded schematic diagram of the pump column mechanism according to an embodiment of the present invention.

[0024] Figure numerals: Main body 100, piston chamber 101, liquid storage chamber 102, one-way valve structure 110, partition part 120, cylinder part 130, plug-in ring 131, give way hole 140; Pump column mechanism 200, liquid outlet channel 201, connecting channel 202, liquid outlet column 210, lower push part 211, plug-in column 212, plug-in ring 131, connecting pipe 220, main column 230, upper push part 231; Piston part 300; Back-suction chamber 400; Press head 500; Spring 600; Suction tube 700; Installation cover 800. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present invention, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] Bottled liquids are commonly dispensed in a metered manner using a pump. Existing pumps include a main body 100, a pump mechanism 200, and a piston 300. The main body 100 defines a pump chamber, with a liquid suction port and a one-way valve structure 110 at the bottom. The piston 300 is vertically slidably mounted within the pump chamber. The pump mechanism 200 is provided with a liquid outlet channel 201. The pump mechanism 200 vertically penetrates the pump chamber and drives the piston 300 upward and downward. The portion of the pump chamber below the piston 300 forms the liquid reservoir 102. As the pump mechanism 200 rises, it also drives the piston 300 upward. Under the influence of atmospheric pressure, liquid enters the liquid reservoir 102 through the one-way valve structure 110. As the pump mechanism 200 descends, it also drives the piston 300 downward, squeezing the liquid within the liquid reservoir 102 through the liquid outlet channel 201, ultimately discharging a metered amount from the push button 500 at the top of the pump mechanism 200. The existing press pump has a small amount of liquid discharged in one press. When the amount of liquid used is large, multiple presses are required, which is not convenient to use, especially in situations where the height of the bottle placement area is limited and the operating space is small.

[0030] 1 to 6 , a compression pump according to an embodiment of the present invention includes a body 100 , a pump column mechanism 200 and two piston members 300 . The main body 100 is provided with a pump chamber and a one-way valve structure 110. A suction hole is opened at the lower end of the pump chamber. The one-way valve structure 110 is arranged at the suction hole and limits the fluid to enter the pump chamber from the suction hole in one direction. The main body 100 is provided with a partition part 120. The partition part 120 divides the pump chamber into two piston chambers 101 arranged vertically; the pump column mechanism 200 is movably arranged on the main body 100 along the vertical direction and passes through all piston chambers 101. The pump column mechanism 200 is provided with a liquid outlet channel 201; two piston members 300 are arranged in the piston chamber 101 in a one-to-one manner along the vertical sliding direction. The piston member 300 can move with the pump column mechanism 200. The part of the piston chamber 101 located on the lower side of the corresponding piston member 300 is defined as the liquid storage chamber 102. All liquid storage chambers 102 are connected to each other, and one end of the liquid outlet channel 201 is connected to the liquid storage chamber 102.

[0031] When the pressing pump is pressed, the pump column mechanism 200 descends, driving all the piston parts 300 to descend. At this time, the volume of all the liquid storage chambers 102 is compressed, and the liquid in the liquid storage chamber 102 is finally squeezed out through the liquid outlet channel 201, thereby increasing the liquid output during a single press; when the lifting column rises and resets, the liquid enters all the interconnected liquid storage chambers 102 through the one-way valve structure 110 for storage, waiting for the next press.

[0032] In this embodiment, the main body 100 of the press pump is provided with a partition portion 120, which divides the pump cavity into two piston cavities 101, and correspondingly, two piston members 300 are also provided, thereby forming two liquid storage cavities 102. When the two piston members 300 descend, they compress the volume of the two liquid storage cavities 102 respectively, so that the liquid output of a single press can be nearly doubled. It is conceivable that in other embodiments, the number of partition portions 120 provided on the main body 100 can also be other numbers, such as two, three or more, to divide the pump cavity into three, four or more piston cavities 101, and correspondingly, three, four or more piston members 300 are also provided. The number of piston cavities 101 and the number of piston members 300 can be specifically configured according to the actual needs of those skilled in the art.

[0033] Specifically, when there are two partition parts 120, the two partition parts 120 divide the pump chamber into three piston chambers 101. At this time, there are also three piston parts 300, thereby forming three liquid storage chambers 102. When the three piston parts 300 descend, the volume of the three liquid storage chambers 102 is compressed respectively, so that the liquid output in a single press can reach nearly three times.

[0034] Similarly, when there are three partition parts 120, the three partition parts 120 divide the pump chamber into four piston chambers 101. At this time, four piston members 300 are also provided, thereby forming four liquid storage chambers 102. When the four piston members 300 descend, they compress the volume of the four liquid storage chambers 102 respectively, so that the amount of liquid discharged in a single press can reach nearly four times. Similarly, when there are N partition parts 120, N partition parts 120 divide the pump chamber into N+1 piston chambers 101. At this time, N+1 piston members 300 are also provided, thereby forming N+1 liquid storage chambers 102. When the N+1 piston members 300 descend, they compress the volume of the N+1 liquid storage chambers 102 respectively, so that the amount of liquid discharged in a single press can reach nearly N+1 times.

[0035] In this embodiment, the pump column mechanism 200 includes a vertically arranged connecting rod structure, which is provided with a liquid outlet channel 201 and a connecting channel 202. The connecting channel 202 connects two adjacent liquid storage chambers 102. The connecting rod structure is connected to the piston member 300. When the connecting rod structure is raised or lowered, it not only drives the piston member 300 to move up and down, but also functions to circulate the liquid in the liquid storage chambers 102 to facilitate uniform extrusion from the liquid outlet channel 201. The structure is simple and compact.

[0036] In the embodiment, the connecting rod structure includes a liquid outlet column 210 and a connecting tube 220. The liquid outlet column 210 is provided with a liquid outlet channel 201, and the connecting tube 220 is provided with a connecting channel 202. The upper end of the connecting tube 220 is connected to the lower end of the liquid outlet column 210. The adjacent liquid storage chambers 102 realize the flow of liquid through the connecting tube 220, so that the liquid in each liquid storage chamber 102 can flow to the liquid outlet channel 201, and the liquid outlet column 210 can drive the connecting tube 220 to move. The connecting rod structure is relatively compact and has good functional integration. The liquid outlet column 210 and the connecting tube 220 are produced separately and then assembled to form the connecting rod structure, which reduces the difficulty of production and manufacturing.

[0037] Specifically, a notch is provided on the side wall of the liquid outlet column 210 , and the liquid in the corresponding liquid storage cavity 102 can enter the liquid outlet channel 201 through the notch.

[0038] In this embodiment, the main body 100 is provided with two piston chambers 101. The upper end of the connecting tube 220 is located in the upper liquid storage chamber 102, and the lower end of the connecting tube 220 extends through the lower sidewall of the piston member 300 located below. When the main body 100 is provided with two piston chambers 101, the compression stroke of the compression pump is relatively minimally affected, while significantly increasing the amount of liquid discharged by the monomer, resulting in relatively better performance.

[0039] Specifically, a plug-in post 212 is provided at the lower end of the liquid outlet column 210. The plug-in post 212 is partially inserted into the upper end of the connecting tube 220, so that the liquid outlet column 210 and the connecting tube 220 can be raised and lowered synchronously. The plug-in post 212 is provided with a blind hole, and the side wall of the blind hole is provided with a notch, so that the liquid in the lower liquid storage chamber 102 can pass through the connecting channel 202 and the notch of the plug-in post 212 into the upper liquid storage chamber 102. The notch and the blind hole facilitate the elastic deformation of the plug-in post 212 to insert into the upper end of the connecting tube 220.

[0040] Specifically, the outer side of the plug-in column 212 is provided with ribs in the horizontal direction, and the inner wall of the connecting tube 220 is correspondingly provided with grooves. The ribs and the grooves are adapted to each other, so that the plug-in fit between the liquid outlet column 210 and the connecting tube 220 is relatively firm, and the connection between the two is relatively firm when the liquid outlet column 210 pulls the connecting tube 220 to move up and down.

[0041] It is conceivable that the connecting tube 220 can also be connected to the liquid outlet column 210 in other ways, for example, the connecting tube 220 is connected and fixed to the liquid outlet column 210 by gluing, or the connecting tube 220 is connected and fixed to the liquid outlet column 210 by threading.

[0042] It is conceivable that two notches may be directly opened in the wall of the connecting tube 220 , with the two notches respectively located in the two liquid storage chambers 102 , so that the liquid in the lower liquid storage chamber 102 can enter the upper liquid storage chamber 102 .

[0043] In the embodiment, the connecting tube 220 and the piston member 300 located below are integrally formed. When there are two piston chambers 101, the structure is significantly simplified and the assembly difficulty is reduced. It is conceivable that the connecting tube 220 and the piston member 300 located below can also be manufactured separately and assembled into one body.

[0044] It is conceivable that when the main body 100 is provided with multiple piston chambers 101, the connecting tube 220 can be connected to multiple piston chambers 101. For example, the connecting tube 220 has notches on the tube wall corresponding to the number of piston chambers 101. The liquid in each piston chamber 101 can enter the piston chamber 101 where the liquid outlet column 210 is located through the corresponding notch, and finally flow out from the liquid outlet channel 201, so that all piston chambers 101 are connected to each other.

[0045] It is conceivable that the connecting rod structure may also be an integrally formed structure, that is, the liquid outlet column 210 and the connecting pipe 220 are an integrally formed structure.

[0046] It is conceivable that all liquid storage chambers 102 can also be interconnected in other ways. For example, several pipelines are respectively provided in the main body 100, and the liquid storage chamber 102 where the liquid outlet column 210 is located is connected to all other liquid storage chambers 102 through several pipelines.

[0047] Specifically, the liquid in the other liquid storage chambers 102 of this embodiment will flow through the connecting tube 220 to the liquid storage chamber 102 where the liquid outlet column 210 is located, and then flow out through the liquid outlet channel 201. It is conceivable that in some embodiments, the connecting channel 202 can be directly connected to the liquid outlet channel 201, that is, the liquid in all liquid storage chambers 102 will flow directly through the connecting channel 202 to the liquid outlet channel 201 and flow out directly.

[0048] In the embodiment, the body 100 includes two vertically arranged cylindrical members 130. Each cylindrical member 130 is provided with a piston cavity 101. The upper ends of the cylindrical members 130 are provided with an opening. Adjacent cylindrical members 130 are connected. The bottom walls of the cylindrical members 130 form a partition 120. The partition 120 defines a clearance hole 140 for accommodating the pump column mechanism 200. The body 100 is formed by connecting a plurality of cylindrical members 130 in a vertical arrangement, which reduces the manufacturing difficulty when the body 100 has multiple piston cavities 101 and improves manufacturability. It is understood that when the body 100 has three piston cavities 101, the body 100 can be composed of three vertically arranged cylindrical members 130 connected together to reduce manufacturing difficulties. When the body 100 has multiple piston cavities 101, the body 100 can be composed of cylindrical members 130 equal in number to the number of piston cavities 101, reducing manufacturing difficulties.

[0049] Specifically, the lower end of the upper cylinder 130 is provided with a plug ring 131131, which is inserted into the piston cavity 101 of the lower cylinder 130. The outer peripheral wall of the plug ring 131131 abuts and cooperates with the inner wall of the piston cavity 101, thereby connecting and fixing the two adjacent cylinders 130. Furthermore, the outer peripheral wall of the plug ring 131131 is provided with a rib, and the inner wall of the piston cavity 101 is provided with a groove. The rib is embedded in the groove, making the connection between the two more secure and enhancing the structural strength.

[0050] It is conceivable that two adjacent cylinder members 130 can also be assembled, connected and fixed by other structures. For example, two adjacent cylinder members 130 are connected and fixed by gluing, or a stud is provided on the upper cylinder member 130 and a threaded hole is provided in the piston chamber 101 of the lower cylinder member 130, and the two adjacent cylinder members 130 are connected and fixed by threaded connection.

[0051] It is conceivable that the main body 100 may also be an integrally formed structure.

[0052] In the embodiment, the clearance hole 140 is a tapered hole, and the wall of the small end of the tapered hole is in sealing contact with the pump column mechanism 200. The tapered hole structure of the clearance hole 140 facilitates the assembly of the pump column mechanism 200 and the cylinder member 130. The pump column mechanism 200 can be relatively easily and accurately passed through the tapered hole, eliminating the need for complex alignment processes, thereby facilitating assembly.

[0053] In the embodiment, the lower periphery of some piston members 300 is provided with a chamfered portion, which makes it easier for the piston member 300 to be inserted into the corresponding piston cavity 101 accurately and relatively simply without the need for a complicated alignment process, thus facilitating assembly.

[0054] In this embodiment, one end of the liquid outlet channel 201 is connected to the uppermost liquid storage chamber 102, making the structure of the pump column mechanism 200 simpler and easier to implement. It is understood that one end of the liquid outlet channel 201 can also be located in the remaining liquid storage chambers 102 below, and those skilled in the art can configure it according to actual needs.

[0055] In the embodiment, the pump column mechanism 200 includes a liquid outlet column 210, the liquid outlet column 210 is provided with a liquid outlet channel 201, the pump column mechanism 200 also includes a main column 230, the liquid outlet column 210 is provided with a lower push portion 211, the main column 230 is provided with an upper push portion 231 around the outer side of the liquid outlet column 210, the uppermost piston member 300 is located between the upper push portion 231 and the lower push portion 211, and the uppermost piston member 300 and the upper push portion 231 are sealed with each other. The pump column mechanism 200 is sealed and slidably matched. When the pump column mechanism 200 rises, the uppermost piston member 300 can descend relative to the liquid outlet column 210 to a sealed fit with the lower push portion 211, so that the piston member 300, the upper push portion 231 and the liquid outlet column 210 enclose a back-suction chamber 400. The volume of the back-suction chamber 400 increases as the pump column mechanism 200 rises. When the pump column mechanism 200 descends, the piston member 300 separates from the lower push portion 211 and allows the liquid in the uppermost liquid storage chamber 102 to enter the liquid outlet channel 201. Specifically, the upper push portion 231 is a hole structure, and the lower push portion 211 is a plate structure. The above structure allows the pump column mechanism 200 to suck the liquid at the pressing head 500 back into the liquid outlet channel 201 and the back-suction chamber 400 when it rises and resets, and then refluxes it into the liquid storage chamber 102, thereby avoiding liquid waste. When the pressing head 500 is pressed, the piston 300 is separated from the lower pushing portion 211 , so that the liquid in the liquid storage chamber 102 can directly enter the liquid outlet channel 201 and flow out.

[0056] Specifically, the friction between the piston member 300 and the piston chamber 101 is greater than the friction between the piston member 300 and the upper push portion 231. As a result, during the ascent of the pump column mechanism 200, the piston member 300 initially remains stationary relative to the piston chamber 101 until the piston member 300 abuts and seals against the lower push portion 211. Subsequently, the lower end of the piston member 300 undergoes local elastic deformation, causing the piston member 300 to remain stationary while the upper push portion 231 continues to rise, thereby increasing the volume of the re-suck chamber 400. When the piston member 300 no longer elastically deforms, the lower push portion 211 drives the corresponding piston member 300 upward, thereby drawing the liquid in the bottle into the liquid storage chamber 102.

[0057] When the pump column mechanism 200 descends, the upper pushing portion 231 descends and the corresponding piston member 300 remains stationary relative to the piston chamber 101 until the upper end of the piston member 300 is pushed down by the upper pushing portion 231. At this time, the liquid in the corresponding liquid storage chamber 102 can be compressed and eventually flows out from the liquid outlet channel 201.

[0058] It is conceivable that the upper pushing portion 231 may also be a ring structure, and the outer peripheral wall of the ring structure is in sealing sliding cooperation with the piston member 300.

[0059] Specifically, a liquid channel is also provided in the main column 230 of the pump column mechanism 200. The liquid outlet channel 201 of the liquid outlet column 210 is connected to the pressing head 500 through the liquid channel of the main column 230. The pressing head 500 is connected to the upper end of the main column 230. A spring 600 is provided between the pressing head 500 and the main body 100. When the pressing head 500 is pressed down and released, the spring 600 can exert an elastic force to push the pressing head 500 and the pump column mechanism 200 to rise and reset so that the pressing pump can be used next time.

[0060] Specifically, a liquid suction tube 700 is further provided at the lower end of the body 100 , and the upper end of the liquid suction tube 700 is connected to the liquid suction port, so as to facilitate the suction of liquid from the inside of the bottle.

[0061] Specifically, a mounting cover 800 is further provided on the outer peripheral side of the main body 100 . The mounting cover 800 is provided with a threaded hole. The mounting cover 800 facilitates threading the pressing pump to the bottle body for use.

[0062] Specifically, in the field of compression pumps, the structure of the one-way valve structure 110 is relatively common and will not be described in detail here.

[0063] Specifically, the piston cavity 101 is provided with an air pressure hole, which is located above the piston member 300 corresponding to the piston cavity 101, so as to reduce the resistance of air pressure when the piston member 300 is raised or lowered.

[0064] Throughout this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0065] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A compression pump, characterized in that: include: The body (100) is provided with a pump chamber and a one-way valve structure (110). A liquid suction hole is opened at the lower end of the pump chamber. The one-way valve structure (110) is arranged at the liquid suction hole and limits the fluid from entering the pump chamber from the liquid suction hole in one direction. The body (100) is provided with a partition part (120). The partition part (120) divides the pump chamber into at least two piston chambers (101) arranged vertically. A pump column mechanism (200) is movably arranged on the body (100) in a vertical direction and penetrates all the piston chambers (101), and the pump column mechanism (200) is provided with a liquid outlet channel (201); At least two piston members (300) are arranged in the piston cavity (101) in a one-to-one correspondence and slide vertically. The piston members (300) can move with the pump column mechanism (200). The part of the piston cavity (101) located on the lower side of the corresponding piston member (300) is defined as a liquid storage cavity (102). All the liquid storage cavities (102) are connected to each other, and one end of the liquid outlet channel (201) is connected to the liquid storage cavity (102).

2. The compression pump according to claim 1, wherein: The pump column mechanism (200) includes a connecting rod structure arranged vertically, the connecting rod structure is provided with a connecting channel (202), the connecting channel (202) connects two adjacent liquid storage chambers (102), and the connecting rod structure is connected to the piston member (300).

3. The compression pump according to claim 2, wherein: The connecting rod structure comprises a liquid outlet column (210) and a connecting pipe (220), wherein the liquid outlet column (210) is provided with the liquid outlet channel (201), and the connecting pipe (220) is provided with the communicating channel (202), and the upper end of the connecting pipe (220) is connected to the lower end of the liquid outlet column (210).

4. The compression pump according to claim 3, wherein: The body (100) is provided with two piston chambers (101), the upper end of the connecting tube (220) is located in the upper liquid storage chamber (102), and the lower end of the connecting tube (220) is connected to the lower side wall of the piston member (300) located below.

5. The compression pump according to claim 4, wherein: The connecting pipe (220) and the piston member (300) located below are an integrally formed structure.

6. The compression pump according to claim 1, wherein: The body (100) includes at least two cylinder members (130) arranged vertically, the cylinder member (130) is provided with the piston chamber (101), the upper end of the cylinder member (130) is provided with an opening, two adjacent cylinder members (130) are connected, the bottom wall of the cylinder member (130) forms the partition part (120), and the partition part (120) is provided with a clearance hole (140) for making way for the pump column mechanism (200).

7. The compression pump according to claim 6, wherein: The relief hole (140) is a tapered hole, and the small end hole wall of the tapered hole is in sealing contact with the pump column mechanism (200).

8. The compression pump according to claim 6, wherein: At least a portion of the lower periphery of the piston member (300) is provided with a chamfered portion.

9. The compression pump according to claim 1, wherein: One end of the liquid outlet channel (201) is in communication with the uppermost liquid storage chamber (102).

10. The compression pump according to claim 9, wherein: The pump column mechanism (200) includes a liquid outlet column (210), the liquid outlet column (210) is provided with the liquid outlet channel (201), and the pump column mechanism (200) further includes a main column (230), the liquid outlet column (210) is passed through the main column (230), the liquid outlet column (210) is provided with a lower push portion (211), and the main column (230) is provided with an upper push portion (231) surrounding the outer side of the liquid outlet column (210), the uppermost piston member (300) is located between the upper push portion (231) and the lower push portion (211), and the uppermost piston member (300) and the upper push portion (231) are sealed with each other. When the pump column mechanism (200) rises, the uppermost piston member (300) can descend relative to the liquid outlet column (210) to be sealed with the lower push portion (211), so that the piston member (300), the upper push portion (231) and the liquid outlet column (210) are combined to form a back-suction chamber (400), and the volume of the back-suction chamber (400) increases as the pump column mechanism (200) rises; when the pump column mechanism (200) descends, the piston member (300) is separated from the lower push portion (211) and allows the liquid in the uppermost liquid storage chamber (102) to enter the liquid outlet channel (201).

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