A dual-chamber emulsion pump

Abstract

This utility model discloses a dual-chamber emulsion pump, including a pump body, a pump head, a pump column assembly, a seal, a pump ball, and an elastic element. The pump body has a pump chamber, a sealing channel, and a connecting channel that run from top to bottom, and also has an additional chamber with an opening at the lower end. The pump head is connected to the pump column assembly, which is movably inserted into the pump body and can move longitudinally. The pump column assembly has a trigger rod at its lower end. The seal can move relative to the pump body between a first position and a second position. In the first position, it seals the lower opening of the additional chamber. The seal has a driven rod extending to the sealing channel. The elastic element applies an upward force to the pump column assembly. When the pump column assembly is pressed down, it pushes the pump ball downward in the sealing channel, thereby pushing the driven rod to move the seal to the second position, opening the lower opening of the additional chamber. This structure is simplified, reduces the number of parts, lowers costs, improves assembly efficiency and reliability, and facilitates user operation for mixing liquids in both chambers.

Description

Technical Field

[0001] This utility model relates to the field of emulsion pump technology, and in particular to a dual-chamber emulsion pump. Background Technology

[0002] Emulsion pumps, widely used in daily chemicals, pharmaceuticals, and food industries, function primarily to dispense a measured amount of liquid (such as emulsions, creams, and detergents) from a container through pressing or other operations, providing users with a convenient way to dispensing the liquid. In typical usage scenarios, emulsion pumps are usually used with a single container. The container's cavity contains the liquid to be used, and the user extracts the liquid by repeatedly pressing the pump body, utilizing the piston movement or air pressure changes within the pump.

[0003] However, in certain specialized applications, such as some functional skincare products, specialty pharmaceuticals, and industrial mixed reagents, the stability and timeliness of liquids become critical considerations. Because some ingredients are prone to chemical reactions, separation, inactivation, or deterioration after pre-mixing, manufacturers need to physically separate two (or more) liquid components before the product leaves the factory. These components are then mixed when the consumer purchases and is ready to use the product to achieve the best results. Based on this specific need, dual-chamber emulsion pumps have emerged.

[0004] The existing design concept of dual-chamber emulsion pumps is to achieve liquid storage by setting up a separate auxiliary chamber: this auxiliary chamber is integrated into the emulsion pump structure and is used to hold one type of liquid that needs to be separated; while the external container connected to the emulsion pump serves as another chamber for holding another type of liquid. When the consumer needs to use it, a specific operation is performed to open the auxiliary chamber, allowing the liquid in the auxiliary chamber to flow into the external container, mix with the liquid in the external container, and then the mixed liquid can be drawn out like a conventional emulsion pump.

[0005] While existing dual-chamber emulsion pumps can meet the basic requirements of liquid separation and post-mixing, they have significant shortcomings in practical applications. The core problem lies in the overly complex structural design for opening the additional chamber. To achieve the opening function of the additional chamber, existing technologies often require adding multiple transmission components to the basic emulsion pump structure. These additional components not only increase the overall structural complexity of the emulsion pump but also significantly increase the number of steps in the production and assembly process, thereby increasing both production difficulty and production costs.

[0006] Based on the above, the existing dual-chamber emulsion pump needs further improvement. Utility Model Content

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a dual-chamber emulsion pump with a simple structure and convenient operation.

[0008] A dual-chamber emulsion pump designed for this purpose includes a pump body, a pump head, a pump column assembly, seals, pump balls, and elastic elements.

[0009] The pump body is provided with a pump chamber, a sealing channel and a connecting channel connected sequentially from top to bottom;

[0010] The pump head is connected to the pump column assembly; the pump column assembly is movably inserted into the pump body and is longitudinally movable relative to the pump body.

[0011] The pump body is provided with an additional cavity with a lower opening. The sealing member is movable relative to the pump body and moves between a first position and a second position. When the sealing member is in the first position, the sealing member seals the lower opening of the additional cavity.

[0012] The lower end of the pump column assembly is provided with a trigger rod, and the seal is provided with a driven rod that can extend to the sealing channel;

[0013] When the pump column assembly moves downward relative to the pump body, it can push the pump ball to move from top to bottom in the sealing channel, thereby pushing the driven rod to move the seal to the second position; when the seal is in the second position, the lower opening of the auxiliary cavity is in the open state;

[0014] The elastic element is used to apply an upward force to the pump column assembly.

[0015] Preferably, the sealing element is connected to a connecting sleeve, the connecting sleeve is longitudinally movably inserted into the communicating channel, and the driven rod is fixedly connected to the upper end of the connecting sleeve;

[0016] A connecting cavity, which communicates with the suction tube, is provided between the driven rod and the connecting sleeve.

[0017] When the seal is in the second position, the sealing channel, the communicating cavity, and the suction tube are interconnected.

[0018] Preferably, two positioning grooves are longitudinally spaced within the connecting channel, and the outer wall of the connecting sleeve is provided with a positioning part that can be embedded into the positioning groove.

[0019] When the seal is in the first position, the positioning part is embedded in the positioning groove on the upper side;

[0020] When the seal is in the second position, the positioning part is embedded in the positioning groove on the lower side.

[0021] Preferably, when the dual-chamber emulsion pump is in transport mode, the pump ball is located inside the pump chamber and both the trigger rod and the driven rod remain inserted in the sealed channel.

[0022] Preferably, the upper end of the sealing channel is provided with a plurality of deformable ribs arranged along the circumference, and the deformable ribs can constrain the pump ball to remain within the sealing channel;

[0023] The lower part of the sealing channel is provided with an annular cone; when the pump ball is driven downward by the trigger rod, the pump ball can fit against the annular cone to maintain a seal.

[0024] Preferably, the pump column assembly includes a main column, a secondary column, and an annular sealing piston; the driven rod is fixedly connected to the secondary column;

[0025] The main column is provided with a liquid suction channel inside, the main column is connected to the pump head, and the liquid suction channel is connected to the internal channel of the pump head;

[0026] The auxiliary column is located at the lower end of the main column, and an inlet is provided between the main column and the auxiliary column;

[0027] The annular sealing piston is movable up and down relative to the main column, and can move between a sealed position and an open position; when the annular sealing piston is in the sealed position, the liquid inlet is in a sealed state; when the annular sealing piston is in the open position, the liquid inlet is in an open state.

[0028] Preferably, the auxiliary cavity is located below the pump cavity; the auxiliary cavity has an annular structure, and the sealing channel and the communicating channel are located on the pump body inside the auxiliary cavity.

[0029] Compared with the prior art, the dual-chamber emulsion pump provided by this invention has significant advantages, as detailed below:

[0030] Firstly, the structure is significantly simplified, improving assembly efficiency. This dual-chamber emulsion pump cleverly designs the pump column assembly, seals, and their interlocking relationship. Utilizing the force exerted by the pump column assembly as it moves downwards relative to the pump body, it directly drives the pump ball and driven rod, moving the seals to open the lower opening of the auxiliary chamber. The entire opening mechanism relies solely on the coordinated action of core components such as the pump column assembly, trigger rod, pump ball, driven rod, and seals. No additional complex transmission parts are needed, greatly simplifying the overall structure, reducing the number of parts, thereby lowering the complexity of the assembly process and significantly improving production assembly efficiency.

[0031] Secondly, it is easy to operate and highly reliable. When using it, consumers simply need to unscrew the pump head, causing the pump column assembly to spring upwards, and then press down to move the pump column assembly downwards. This mechanical transmission directly triggers the switching of the seal position, completing the opening of the auxiliary chamber. The operation process balances safety and convenience, similar to the usage habits of conventional emulsion pumps, eliminating the need for additional learning of complex opening procedures and improving the user experience. At the same time, by reducing redundant transmission components, the risk of failures such as wear and jamming between parts is significantly reduced. The switching of the seal between the first position (sealed state) and the second position (open state) is more stable, effectively ensuring the sealing performance and opening reliability of the auxiliary chamber.

[0032] Thirdly, production costs are reduced and practicality is enhanced. Compared to existing dual-chamber emulsion pumps that require multiple additional transmission components, this solution reduces the number of parts, thereby lowering raw material procurement costs and reducing energy and labor costs during production, processing, and assembly, significantly improving the product's cost advantage. Furthermore, the simplified structural design makes the product easier to standardize and reduces maintenance costs during long-term use, better meeting market demand for high-performance, cost-effective, and highly practical dual-chamber emulsion pumps, and possessing broad application prospects. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0034] Figure 2 A cross-sectional view of the pump head in the screwed-on state with the pump body.

[0035] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0036] Figure 4 A schematic cross-sectional view of the pump head and pump column assembly within the spring-loaded device;

[0037] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0038] Figure 6 This is a cross-sectional structural diagram of the pump head and pump column assembly in a pressure-bearing device.

[0039] Figure 7 for Figure 6 Enlarged structural diagram at point C;

[0040] Figure 8 This is a schematic diagram of the cross-sectional structure of the pump body. Detailed Implementation

[0041] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0043] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0044] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0045] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0046] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0047] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0048] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0049] See Figures 1-8 A dual-chamber emulsion pump includes a pump body 10, a pump head 20, a pump column assembly 30, a seal 40, a pump ball 50, and an elastic element. The pump body 10 is provided with a pump chamber 103, a sealing channel 102, and a connecting channel 101 connected sequentially from top to bottom. The pump head 20 is connected to the pump column assembly 30. The pump column assembly 30 is movably inserted into the pump body 10 and is longitudinally movable relative to the pump body 10. The pump body 10 is provided with an additional cavity 110 with an opening at the lower end. The seal 40 is movable relative to the pump body 10 and moves between a first position and a second position. When the seal 40 is in the first position, the seal... The seal 40 seals the lower opening of the auxiliary cavity 110; the lower end of the pump column assembly 30 is provided with a trigger rod 350, and the seal 40 is provided with a driven rod 420 that can extend to the sealing channel 102; when the pump column assembly 30 moves downward relative to the pump body 10, it can push the pump ball 50 to move from top to bottom in the sealing channel 102, thereby pushing the driven rod 420 to move the seal 40 to the second position; when the seal 40 is in the second position, the lower opening of the auxiliary cavity 110 is in the open state; the elastic element is used to apply an upward moving force to the pump column assembly 30.

[0050] The operating principle of this dual-chamber emulsion pump is explained step by step based on the cooperation relationship between the various components under different conditions, as follows:

[0051] When the pump head is in the tightened state (factory default state), the pump head 20 and pump body 10 are in a tightened and fixed state, and the elastic element is in a compressed state. The pump ball 50 is located in the pump chamber 103. This arrangement has an important purpose: since the pump head 20 needs to be tightened onto the pump body 10, in this state, the downward stroke of the trigger rod 350 is greater than its downward stroke under pressure during user use. To prevent the trigger rod 350 from accidentally triggering the driven rod 420 due to excessive downward distance during the tightening of the pump head, which would cause the seal 40 to move to the second position prematurely and open the auxiliary chamber 110, the pump ball 50 needs to be removed from the sealing channel 102 and placed in the pump chamber 103. At this time, both the trigger rod 350 and the driven rod 420 remain inserted in the sealing channel 102. However, since the pump ball 50 is not in the sealing channel 102, the downward movement of the trigger rod 350 will not push the pump ball 50 to contact the driven rod 420, thereby ensuring that the seal 40 is stably in the first position, tightly fitting the lower opening of the auxiliary cavity 110, thus sealing the auxiliary cavity 110 and ensuring that the liquid in the auxiliary cavity 110 is completely separated from the liquid in the container connected to the pump body 10, ensuring the stability of the product when it leaves the factory.

[0052] When the pump head is in the pop-up state (the user unscrews the pump head), the previously compressed elastic element releases its elasticity, applying an upward force to the pump column assembly 30, causing the pump head 20, pump column assembly 30, and trigger rod 350 to pop upward as a whole. During this process, the trigger rod 350 disengages from the sealing channel 102, and the pump ball 50, under its own weight, slides from the pump chamber 103 to the upper opening of the sealing channel 102, preparing for pushing the pump ball 50 back into the sealing channel 102 during subsequent use.

[0053] When the pump head is under pressure (the user presses down on the pump head), the user presses down on the pump head 20. The pump head 20 drives the pump column assembly 30 and the trigger rod 350 to move downwards simultaneously, and the elastic element is compressed again. As the trigger rod 350 moves downwards, its front end pushes the pump ball 50 located at the opening above the sealing channel 102 into the sealing channel 102. At the same time, the trigger rod 350 continues to move downwards and simultaneously pushes the driven rod 420 of the seal 40 downwards. Driven by the driven rod 420, the seal 40 moves from the first position to the second position. At this time, the lower opening of the auxiliary cavity 110 is fully opened, and the liquid in the auxiliary cavity 110 flows into the container connected to the pump body 10 through the lower opening, mixing with the liquid in the container so that the user can subsequently take the mixed liquid by pressing the pump head.

[0054] See Figure 3The sealing element 40 is connected to a connecting sleeve 410, which is longitudinally movably inserted into the communicating channel 101. The driven rod 420 is fixedly connected to the upper end of the connecting sleeve 410. A communicating cavity 430, which communicates with the suction tube 60, is provided between the driven rod 420 and the connecting sleeve 410. When the sealing element 40 is in the second position, the sealing channel 102, the communicating cavity 430, and the suction tube 60 are interconnected. In this embodiment, the connecting sleeve 410 is longitudinally movably inserted into the communicating channel 101 to guide the movement of the sealing element 40 and ensure its precise position switching. The driven rod 420 is fixed to the upper end of the connecting sleeve 410 and bears the thrust of the trigger rod 350, driving the sealing element 40 to move and open the additional cavity 110. The communicating cavity 430 between the two communicates with the sealing channel 102 and the suction tube 60 when the sealing element 40 is in the second position, forming a liquid flow path to ensure that the mixed liquid is smoothly extracted.

[0055] See Figure 7 The connecting channel 101 has two longitudinally spaced positioning grooves 104, and the outer wall of the connecting sleeve 410 has a positioning part 411 that can be embedded in the positioning groove 104. The two positioning grooves 104 in the connecting channel 101 cooperate with the positioning part 411 on the outer wall of the connecting sleeve 410 to accurately position the seal 40. When the seal 40 is in the first position, the positioning part 411 is embedded in the upper positioning groove 104 to secure the seal. When the seal 40 is in the second position, the positioning part 411 is embedded in the lower positioning groove 104 to ensure that the auxiliary cavity 110 is stably opened and to prevent the seal 40 from moving accidentally.

[0056] See Figure 7 and Figure 8 The upper end of the sealing channel 102 is provided with several strip-shaped ribs 105 arranged circumferentially, and the lower part of the sealing channel 102 is provided with an annular cone 106. The pump ball 50 achieves connection and sealing through vertical movement, which is existing technology. The strip-shaped ribs 105 at the upper end of the sealing channel 102 can constrain the pump ball 50, preventing it from detaching from the sealing channel 102 and ensuring that the pump ball 50 is stably positioned within the sealing channel 102. Simultaneously, when the pump ball 50 is in contact with the several ribs 105, a flow channel is formed between adjacent ribs, which connects the lower connecting channel 101 with the upper pump chamber 103, ensuring liquid flow. The annular cone 106 at the lower part of the sealing channel 102 can fit against the pump ball 50 when the pump ball 50 is driven downward by the trigger rod 350, thereby achieving a good sealing effect.

[0057] See Figure 2 and Figure 3The pump column assembly 30 includes a main column 310, a secondary column 320, and an annular sealing piston 340; the driven rod 420 is fixedly connected to the secondary column 320; the main column 310 has a liquid suction channel inside, the main column 310 is connected to the pump head 20, and the liquid suction channel communicates with the internal channel of the pump head 20; the secondary column 320 is located at the lower end of the main column 310, and an inlet 330 is provided between the main column 310 and the secondary column 320; the annular sealing piston 340 is movable up and down relative to the main column 310, and the annular sealing piston 340 can move between a sealed position and an open position; when the annular sealing piston 340 is in the sealed position, the inlet 330 is in a sealed state; when the annular sealing piston 340 is in the open position, the inlet 330 is in an open state.

[0058] The relevant technology of the pump column assembly 30 is existing technology, and its principle is as follows: When the pump column assembly 30 is pressed down, the annular sealing piston 340 moves upward relative to the main column 310 to the open position, and the liquid inlet 330 is in the open state, so that liquid can enter the suction channel inside the main column 310 through the liquid inlet 330; when the pump column assembly 30 moves upward to reset under the action of the elastic element, the annular sealing piston 340 moves downward relative to the main column 310 to the sealing position, and seals the liquid inlet 330.

[0059] Specifically, regarding the setting of the elastic element, it is set inside the pump chamber 103, with the upper end of the elastic element abutting against the annular sealing piston 340 and its lower end abutting against the cavity wall of the pump chamber 103.

[0060] See Figure 8 The auxiliary cavity 110 is located below the pump cavity 103; the auxiliary cavity 110 has an annular structure, and the sealing channel 102 and the communicating channel 101 are located on the pump body 10 inside the auxiliary cavity 110. This design can efficiently utilize the internal space of the pump body, making the auxiliary cavity and sealing and communicating components compact, facilitating the rapid flow of liquid into the lower container to mix with another liquid after the auxiliary cavity is opened, and also promoting the coordinated operation of various components, improving the rationality of the overall structure and the space utilization rate.

[0061] See Figure 3 The driven rod 420 is provided with a sealing plate 400 at its lower end; when the sealing member 40 is in the first position, it is exactly at the junction of the sealing channel 102 and the connecting channel 101, which can form an effective seal at the junction and effectively strengthen the overall sealing of the emulsion pump.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A dual-chamber emulsion pump, characterized in that: It includes a pump body (10), a pump head (20), a pump column assembly (30), a seal (40), a pump ball (50), and an elastic element; The pump body (10) is provided with a pump chamber (103), a sealing channel (102) and a connecting channel (101) connected from top to bottom; The pump head (20) is connected to the pump column assembly (30); the pump column assembly (30) is movably inserted into the pump body (10) and is longitudinally movable relative to the pump body (10); The pump body (10) is provided with an additional cavity (110) with a lower opening. The sealing member (40) is movably disposed relative to the pump body (10) and moves between a first position and a second position. When the sealing member (40) is in the first position, the sealing member (40) seals the lower opening of the additional cavity (110). The pump column assembly (30) is provided with a trigger rod (350) at its lower end, and the seal (40) is provided with a driven rod (420) that can extend to the sealing channel (102); When the pump column assembly (30) moves downward relative to the pump body (10), it can push the pump ball (50) to move from top to bottom in the sealing channel (102), thereby pushing the driven rod (420) to move the seal (40) to the second position; when the seal (40) is in the second position, the lower opening of the auxiliary cavity (110) is in the open state; The elastic element is used to apply an upward force to the pump column assembly (30).

2. The dual-chamber emulsion pump according to claim 1, characterized in that: The sealing element (40) is connected to a connecting sleeve (410), the connecting sleeve (410) is longitudinally movably inserted into the communicating channel (101), and the driven rod (420) is fixedly connected to the upper end of the connecting sleeve (410); A connecting cavity (430) communicating with the suction tube (60) is provided between the driven rod (420) and the connecting sleeve (410); When the seal (40) is in the second position, the sealing channel (102), the communicating cavity (430), and the suction tube (60) are interconnected.

3. A dual-chamber emulsion pump according to claim 2, characterized in that: The connecting channel (101) is provided with two positioning grooves (104) spaced longitudinally, and the outer wall of the connecting sleeve (410) is provided with a positioning part (411) that can be embedded into the positioning groove (104); When the seal (40) is in the first position, the positioning part (411) is embedded in the positioning groove (104) on the upper side; When the seal (40) is in the second position, the positioning part (411) is embedded in the positioning groove (104) on the lower side.

4. A dual-chamber emulsion pump according to claim 1, characterized in that: When the dual-chamber emulsion pump is in its factory condition, the pump ball (50) is located in the pump chamber (103) and the trigger rod (350) and the driven rod (420) are both inserted into the sealed channel (102).

5. A dual-chamber emulsion pump according to claim 1, characterized in that: The upper end of the sealing channel (102) is provided with a plurality of deformable ribs (105) arranged along the circumference. The deformable ribs (105) can constrain the pump ball (50) to be kept in the sealing channel (102). The lower part of the sealing channel (102) is provided with an annular cone (106); when the pump ball (50) is driven to move downward by the trigger rod (350), the pump ball (50) can fit with the annular cone (106) to maintain a seal.

6. A dual-chamber emulsion pump according to claim 1, characterized in that: The pump column assembly (30) includes a main column (310), a secondary column (320), and an annular sealing piston (340); the driven rod (420) is fixedly connected to the secondary column (320); The main column (310) is provided with a liquid suction channel inside. The main column (310) is connected to the pump head (20) and the liquid suction channel is connected to the internal channel of the pump head (20). The secondary column (320) is disposed at the lower end of the main column (310), and an inlet (330) is provided between the main column (310) and the secondary column (320); The annular sealing piston (340) is movable up and down relative to the main column (310), and the annular sealing piston (340) can move between a sealed position and an open position; when the annular sealing piston (340) is in the sealed position, the liquid inlet (330) is in a sealed state; when the annular sealing piston (340) is in the open position, the liquid inlet (330) is in an open state.

7. A dual-chamber emulsion pump according to claim 1, characterized in that: The additional cavity (110) is located below the pump cavity (103); The additional cavity (110) has an annular structure, and the sealing channel (102) and the communicating channel (101) are located on the pump body (10) inside the additional cavity (110).

8. A dual-chamber emulsion pump according to claim 1, characterized in that: A sealing plate (400) is provided at the lower end of the driven rod (420); When the seal (40) is in the first position, the sealing plate (400) is located at the junction of the sealing channel (102) and the communicating channel (101) and seals the junction.

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