Suction-back type emulsion pump with anti-blocking function

Abstract

The utility model discloses a back-suction type emulsion pump with an anti-blocking function, and belongs to the technical field of daily chemical products, and the key points of the technical scheme are that the back-suction type emulsion pump comprises a pump body, the pump body comprises a back-suction device which comprises an air extracting pump, a backflow pipe and a sealing assembly; the filter device comprises a filter screen; the bottle body is in threaded connection with the pump body; the pump head comprises a liquid outlet pipe; a liquid guide tube; wherein the pump head is connected with the pump body in a sliding mode, and the sucking pump is connected with the pump body. According to the back-suction type emulsion pump with the anti-blocking function, after a user accidentally extrudes a large amount of emulsion, redundant emulsion can be sucked back so as to reduce waste, and the emulsion entering a pipeline can be filtered so as to prevent the pipeline from being blocked by impurities.

Description

Technical Field

[0001] This application belongs to the technical field of daily chemical products, and particularly relates to a suction-back type lotion pump with a clogging prevention function. Background Art

[0002] Lotion pumps are usually used in daily cleaning and skin care products such as hand sanitizer, body wash, facial cleanser, etc., and are widely used in daily life.

[0003] The existing Chinese patent with the publication number CN213650516U discloses a lotion pump with a suction-back structure, including a connection cover. A piston cylinder is fixed to the bottom of the connection cover. A piston plate is hermetically and movably connected inside the piston cylinder. A connection pipe communicates with the top of the piston plate. The upper end of the connection pipe movably penetrates through the piston cylinder and the connection cover. A pressing head is fixed to the upper end of the connection pipe. A one-way valve mechanism is arranged at the bottom of the piston cylinder. A pressing airbag is installed on the outer wall of the pressing head. An extension pipe communicates with the bottom of the piston cylinder. An annular groove is arranged in the inner wall of the extension pipe. An annular airbag is arranged in the annular groove. The pressing airbag and the annular airbag are communicated through an air delivery pipe.

[0004] The structure of the above lotion pump is reasonable and ingeniously designed, which can prevent lotion from dripping from the pressing head and is suitable for popularization and use. However, in the actual use process by users, more lotion may be squeezed out at one time, and this lotion pump cannot suck back the excess lotion, resulting in waste. Moreover, when there are impurities in the liquid, the impurities will clog the pipeline in the lotion pump, and users need to clean the pipeline before they can continue to use it, which is very inconvenient. Summary of the Utility Model

[0005] The purpose of this application is to provide a suction-back type lotion pump with a clogging prevention function for the above-mentioned existing technical problems. After users accidentally squeeze out more lotion, it can suck back the excess lotion to reduce waste, and can filter the lotion entering the pipeline to prevent the pipeline from being clogged by impurities.

[0006] This application provides a suction-back type lotion pump with a clogging prevention function, including a pump body, and the pump body includes:

[0007] A suction-back device, including an air extraction pump, a reflux pipe and a sealing component;

[0008] A filtering device, including a filter screen;

[0009] A bottle body, which is threadedly connected to the pump body;

[0010] A pump head, including a liquid outlet pipe;

[0011] A liquid guiding pipe;

[0012] Among them, the pump head is slidably connected to the pump body, and the air extraction pump is connected to the pump body.

[0013] In this technical solution, by arranging a back-suction device and a filtering device inside the pump body, with an air extraction pump and a reflux pipe arranged in the back-suction device, when it is necessary to back-suction the excess emulsion outside the pump body, the liquid guide pipe and the liquid outlet pipe are isolated by a sealing component. The liquid outlet pipe of the pump head is aligned with the excess emulsion, and the pump head is pressed. When the pump head is pressed down, the emulsion is blocked. Then when the pump head resets, the air extraction pump can extract the air inside the bottle body, creating a negative pressure inside the bottle body, causing the emulsion to flow back into the pump body from the reflux pipe, thereby enabling the emulsion pump to recover the excess emulsion and reducing waste. When it is necessary to extrude the emulsion from the pump body, the reflux pipe and the liquid outlet pipe are isolated by a sealing component. When the pump head is pressed down, the emulsion is extruded from the liquid outlet pipe. Then when the pump head resets, the air extraction pump can extract the air inside the bottle body, creating a negative pressure inside the bottle body, causing the emulsion to flow back from the liquid outlet pipe to reflux a part of the emulsion at the liquid outlet pipe, preventing the emulsion from dripping from the liquid outlet pipe and keeping the surrounding environment of the emulsion pump clean. A filter screen is arranged in the filtering device, and the filter screen can filter the impurities inside the bottle body to prevent the inside of the liquid guide pipe from being blocked by impurities, and the emulsion extruded from the emulsion pump is not mixed with impurities, thereby improving the user experience.

[0014] Further, the back-suction device includes:

[0015] An air extraction piston, which is connected to the air extraction pump;

[0016] An air extraction pipe, which is connected to the air extraction pump;

[0017] A pipe joint, which is installed at the pump head;

[0018] A hose, which is inserted into the pipe joint;

[0019] Wherein, the air extraction piston is slidably connected to the pump head, and the outlet of the air extraction pipe is placed on the upper end face of the bottle body.

[0020] In this technical solution, by arranging an air extraction piston and an air extraction pipe in the back-suction device, with the air extraction piston connected to the air extraction pump and the air extraction pipe connected to the air extraction pump, when the pump head resets after being pressed, the air extraction piston slides on the pump head, enabling the air extraction pipe with its outlet on the upper end face of the bottle body to continuously extract the air inside the bottle body, facilitating the formation of a negative pressure inside the bottle body. A pipe joint is also installed on the pump head, and a hose is inserted into the pipe joint. The outlet of the reflux pipe is connected to the pipe joint, and the hose is also placed on the upper end face of the bottle body. When the emulsion flows back on the reflux pipe, it passes through the pipe joint and the hose and then falls into the bottle body to prevent the emulsion from falling between the pump head and the pump body, affecting the use of the pump body by the user. The emulsion flowing back into the bottle body may carry impurities. Therefore, the emulsion falls from the upper position of the bottle body to facilitate the filtration of the emulsion through the filter screen in the filtering device, keeping the emulsion clean.

[0021] Further, the sealing component includes:

[0022] The knob includes a trigger;

[0023] The first electromagnet includes a first contact;

[0024] The second electromagnet includes a second contact;

[0025] A permanent magnet sphere;

[0026] Wherein, the knob is rotatably connected to the pump head, the first electromagnet is placed at the liquid suction pipe, the second electromagnet is placed at the return pipe, and after the first electromagnet is energized, it is connected to the permanent magnet sphere, and after the second electromagnet is energized, it is connected to the permanent magnet sphere.

[0027] In this technical solution, by arranging a knob in the sealing assembly, the knob is connected with a trigger and is rotatably connected to the pump head, and a first electromagnet with a first contact is arranged at the liquid suction pipe, and a second electromagnet with a second contact is arranged at the return pipe. When it is necessary to squeeze out the emulsion in the pump body, rotate the knob to connect the trigger with the second contact. At this time, the second electromagnet is energized, and the permanent magnet sphere is connected to the second electromagnet. At this time, the return pipe and the liquid outlet pipe are isolated from each other, and the liquid suction pipe and the liquid outlet pipe are communicated with each other, which is convenient for the user to squeeze out the emulsion. When it is necessary for the pump body to recover the excess emulsion, rotate the knob to connect the trigger with the first contact. At this time, the first electromagnet is energized, and the permanent magnet sphere is connected to the first electromagnet. At this time, the liquid suction pipe and the liquid outlet pipe are isolated from each other, and the return pipe and the liquid outlet pipe are communicated with each other, which is convenient for the emulsion pump to recover the emulsion.

[0028] Further, the filtering device includes:

[0029] A housing, the outer shape of which is funnel-shaped;

[0030] An interface, which is placed at the end with a smaller cross-sectional area of the housing;

[0031] Wherein, the filter screen is placed at the end with a larger cross-sectional area of the housing, and the interface is matched with the liquid suction pipe.

[0032] In this technical solution, by arranging a housing in the filtering device, the outer shape of the housing is funnel-shaped, the interface is placed at the end with a smaller cross-sectional area of the housing, and the filter screen is placed at the end with a larger cross-sectional area of the housing. The interface is matched with the liquid suction pipe. The emulsion passes through the filter screen and enters the inside of the housing. When the pump head is pressed down, the emulsion in the housing is attracted by the pump body, enters the pump body through the interface and the liquid suction pipe, and is finally squeezed out from the liquid outlet pipe on the pump head. At this time, the impurities in the emulsion have been filtered by the filter screen to prevent the pipes in the pump body and the pump head from being blocked, and at the same time ensure the cleanliness of the emulsion.

[0033] Further, the filter screen is provided with liquid seepage holes;

[0034] Among them, the liquid seepage holes are evenly arranged on the filter net.

[0035] In this technical solution, by evenly distributing the liquid seepage holes on the filter net, the emulsion passes through the filter net through the liquid seepage holes, while the impurities in the emulsion are isolated outside the housing by the filter net, thereby preventing the liquid guiding pipe from being blocked by impurities, avoiding the user from frequently cleaning the inside of the emulsion pump, and the emulsion extruded by the user from the emulsion pump is cleaner, thus improving the user experience.

[0036] Furthermore, the pump head includes:

[0037] An auxiliary sleeve, which is slidably connected to the pump head;

[0038] Among them, the auxiliary sleeve is provided with a convex block.

[0039] In this technical solution, by slidably connecting an auxiliary sleeve to the pump head, when it is necessary to suck the excess emulsion back into the pump body, the auxiliary sleeve is slid, thereby extending the length of the liquid outlet pipe to facilitate the operation of the back suction device, and the inner diameter of the auxiliary sleeve is larger, increasing the contact range between the pump head and the emulsion. The auxiliary sleeve is provided with a convex block to facilitate the user to slide the auxiliary sleeve, thereby improving the back suction rate of the emulsion pump and accelerating the working efficiency.

[0040] The beneficial effects of this application are:

[0041] 1. When it is necessary to suck back the emulsion, the liquid guiding pipe and the liquid outlet pipe are isolated by the sealing component to prevent the emulsion from being extruded when the pump head is pressed. When the pump head is reset, the air pump extracts the air in the bottle body, forming a negative pressure inside the bottle body, facilitating the emulsion to flow back into the pump body from the return pipe to complete the recovery. The filter net can filter the impurities in the bottle body to prevent the inside of the liquid guiding pipe from being blocked by impurities, and there are no impurities in the emulsion, thus improving the user experience.

[0042] 2. The air extraction pipe on the upper end face of the bottle body can continuously extract the air inside the bottle body to facilitate the formation of a negative pressure inside the bottle body. The hose and the pipe can prevent the emulsion from falling between the pump head and the pump body, facilitating the user to use the pump body. When the pump head is reset, a negative pressure is formed inside the bottle body, causing the emulsion to flow back from the liquid outlet pipe, and preventing the emulsion from dripping from the liquid outlet pipe, thus keeping the surrounding environment of the emulsion pump clean.

[0043] 3. The emulsion enters the inside of the housing after passing through the liquid seepage holes in the filter net. At this time, the impurities have been filtered by the filter net, which can prevent the pipes inside the pump body and the pump head from being blocked, and at the same time ensure the cleanliness of the emulsion. Brief Description of the Drawings

[0044] Figure 1 It is a schematic structural diagram of a back suction type emulsion pump with an anti-blocking function according to this application;

[0045] Figure 2 This is a schematic structural diagram of the inside of a sucking-back type emulsion pump with an anti-blocking function according to the present application;

[0046] Figure 3 is Figure 2 an enlarged view of part A;

[0047] Figure 4 is Figure 2 an enlarged view of part B;

[0048] In the figure, the reference numerals are: 100, pump body; 200, sucking-back device; 210, air extraction pump; 220, return pipe; 230, sealing assembly; 231, knob; 232, first electromagnet; 233, second electromagnet; 234, permanent magnet sphere; 235, trigger; 236, first contact; 237, second contact; 240, air extraction piston; 250, air extraction pipe; 260, pipe joint; 270, hose; 300, filtering device; 310, filter net; 311, liquid seepage hole; 320, housing; 330, interface; 400, bottle body; 500, pump head; 510, liquid outlet pipe; 520, auxiliary sleeve; 521, convex block; 600, liquid guiding pipe. Specific embodiments

[0049] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0050] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0051] Next, the embodiments of the present application will be described in detail in conjunction with the accompanying drawings, through specific embodiments and their application scenarios.

[0052] Embodiment 1:

[0053] As Figures 1-4 shown, the embodiment of the present application provides a sucking-back type emulsion pump with an anti-blocking function, including a pump body 100, and the pump body 100 includes:

[0054] The back suction device 200 includes an air extraction pump 210, a return pipe 220 and a sealing assembly 230;

[0055] The filtering device 300 includes a filter net 310;

[0056] The bottle body 400 is threadedly connected to the pump body 100;

[0057] The pump head 500 includes a liquid outlet pipe 510;

[0058] The liquid guiding pipe 600;

[0059] Wherein, the pump head 500 is slidably connected to the pump body 100, and the air extraction pump 210 is connected to the pump body 100.

[0060] By arranging the back suction device 200 and the filtering device 300 in the pump body 100, the back suction device 200 is provided with an air extraction pump 210 and a return pipe 220. When it is necessary to back suction the excess emulsion outside the pump body 100, the liquid guiding pipe 600 and the liquid outlet pipe 510 are isolated by the sealing assembly 230. Align the liquid outlet pipe 510 of the pump head 500 with the excess emulsion and press the pump head 500. When the pump head 500 is pressed down, the emulsion is blocked. After the pump head 500 is reset, the air extraction pump 210 can extract the air in the bottle body 400, and a negative pressure is formed inside the bottle body 400, so that the emulsion flows back to the pump body 100 from the return pipe 220, thereby enabling the emulsion pump to recover the excess emulsion and reducing waste. When it is necessary to extrude the emulsion from the pump body 100, the return pipe 220 and the liquid outlet pipe 510 are isolated by the sealing assembly 230. When the pump head 500 is pressed down, the emulsion is extruded from the liquid outlet pipe 510. After the pump head 500 is reset, the air extraction pump 210 can extract the air in the bottle body 400, and a negative pressure is formed inside the bottle body 400, so that the emulsion flows back from the liquid outlet pipe 510 to return a part of the emulsion at the liquid outlet pipe 510, avoiding the emulsion from dripping from the liquid outlet pipe 510 and keeping the surrounding environment of the emulsion pump clean. The filtering device 300 is provided with a filter net 310, and the filter net 310 can filter the impurities inside the bottle body 400 to prevent the inside of the liquid guiding pipe 600 from being blocked by impurities, and the emulsion extruded from the emulsion pump is not mixed with impurities, thereby improving the user experience.

[0061] Further, the back suction device 200 includes:

[0062] An air extraction piston 240, which is connected to the air extraction pump 210;

[0063] An air extraction pipe 250, which is connected to the air extraction pump 210;

[0064] A pipe joint 260, which is installed at the pump head 500;

[0065] A hose 270 is inserted between a pipe joint 260;

[0066] Wherein, the air extraction piston 240 is slidably connected to the pump head 500, and the outlet of the air extraction pipe 250 is placed on the upper end face of the bottle body 400.

[0067] By arranging an air extraction piston 240 and an air extraction pipe 250 in the back suction device 200, the air extraction piston 240 is connected to the air extraction pump 210, the air extraction pipe 250 is connected to the air extraction pump 210. When the pump head 500 is reset after being pressed, the air extraction piston 240 slides on the pump head 500, so that the air extraction pipe 250 with the outlet on the upper end face of the bottle body 400 continuously extracts the air inside the bottle body 400, so as to form a negative pressure inside the bottle body 400. A pipe joint 260 is also installed on the pump head 500, and a hose 270 is inserted on the pipe joint 260. The outlet of the return pipe 220 is connected to the pipe joint 260, and the hose 270 is also placed on the upper end face of the bottle body 400. When the emulsion flows back on the return pipe 220, it passes through the pipe joint 260 and the hose 270 and then falls into the bottle body 400 to avoid the emulsion falling between the pump head 500 and the pump body 100, which affects the user's use of the pump body 100. The emulsion flowing back into the bottle body 400 may carry impurities. Therefore, the emulsion falls from the upper position of the bottle body 400 to facilitate the emulsion to pass through the filter screen 310 in the filtering device 300 to keep the emulsion clean.

[0068] Furthermore, the sealing assembly 230 includes:

[0069] A knob 231, including a trigger 235;

[0070] A first electromagnet 232, including a first contact 236;

[0071] A second electromagnet 233, including a second contact 237;

[0072] A permanent magnet sphere 234;

[0073] Wherein, the knob 231 is rotatably connected to the pump head 500, the first electromagnet 232 is placed at the liquid guiding pipe 600, the second electromagnet 233 is placed at the return pipe 220, the first electromagnet 232 is connected to the permanent magnet sphere 234 after being energized, and the second electromagnet 233 is connected to the permanent magnet sphere 234 after being energized.

[0074] By arranging a knob 231 inside the sealing assembly 230, a trigger 235 is connected to the knob 231 and is rotatably connected to the pump head 500. A first electromagnet 232 with a first contact 236 is arranged at the liquid suction pipe 600, and a second electromagnet 233 with a second contact 237 is arranged at the reflux pipe 220. When it is necessary to extrude the emulsion in the pump body 100, the knob 231 is rotated to connect the trigger 235 with the second contact 237. At this time, the second electromagnet 233 is powered on, and a connection is established between the permanent magnet sphere 234 and the second electromagnet 233. At this time, the reflux pipe 220 is isolated from the liquid outlet pipe 510, and the liquid suction pipe 600 is communicated with the liquid outlet pipe 510, facilitating the user to extrude the emulsion. When it is necessary for the pump body 100 to recover the excess emulsion, the knob 231 is rotated to connect the trigger 235 with the first contact 236. At this time, the first electromagnet 232 is powered on, and a connection is established between the permanent magnet sphere 234 and the first electromagnet 232. At this time, the liquid suction pipe 600 is isolated from the liquid outlet pipe 510, and the reflux pipe 220 is communicated with the liquid outlet pipe 510, facilitating the emulsion pump to recover the emulsion.

[0075] Embodiment 2:

[0076] As Figures 1-4 shown, the embodiment of the present application provides a suction-back type emulsion pump with an anti-blocking function. In addition to including the technical solutions of the above embodiments, it also has the following technical features. The filtering device 300 includes:

[0077] A housing 320, whose outer shape is funnel-shaped;

[0078] An interface 330, which is placed at the end with a smaller cross-sectional area in the housing 320;

[0079] Among them, the filter net 310 is placed at the end with a larger cross-sectional area in the housing 320, and the interface 330 is matched with the liquid suction pipe 600.

[0080] By arranging the housing 320 in the filtering device 300, the outer shape of the housing 320 is funnel-shaped, the interface 330 is placed at the end with a smaller cross-sectional area in the housing 320, and the filter net 310 is placed at the end with a larger cross-sectional area in the housing 320. The interface 330 is matched with the liquid suction pipe 600. The emulsion passes through the filter net 310 and is filtered and then enters the inside of the housing 320. When the pump head 500 is pressed down, the emulsion in the housing 320 is attracted by the pump body 100, enters the pump body 100 through the interface 330 and the liquid suction pipe 600, and is finally extruded from the liquid outlet pipe 510 on the pump head 500. At this time, the impurities in the emulsion have been filtered by the filter net 310 to prevent the pipelines in the pump body 100 and the pump head 500 from being blocked, and at the same time ensure the cleanliness of the emulsion.

[0081] Further, the filter net 310 is provided with liquid seepage holes 311;

[0082] Among them, the liquid seepage holes 311 are evenly arranged on the filter net 310.

[0083] By evenly distributing the liquid seepage holes 311 on the filter net 310, the emulsion passes through the filter net 310 through the liquid seepage holes 311, while the impurities in the emulsion are blocked outside the housing 320 by the filter net 310, thereby preventing the liquid guiding pipe 600 from being blocked by impurities, avoiding the user from frequently cleaning the inside of the emulsion pump, and the emulsion extruded by the user from the emulsion pump is cleaner, thus improving the user experience.

[0084] Furthermore, the pump head 500 includes:

[0085] An auxiliary sleeve 520 which is slidably connected with the pump head 500;

[0086] Among them, the auxiliary sleeve 520 is provided with a convex block 521.

[0087] By slidably connecting the auxiliary sleeve 520 on the pump head 500, when it is necessary to suck the excess emulsion back into the pump body 100, the auxiliary sleeve 520 is slid, so as to extend the length of the liquid outlet pipe 510, facilitating the operation of the suction device 200. Moreover, the inner diameter of the auxiliary sleeve 520 is larger, increasing the contact range between the pump head 500 and the emulsion. The auxiliary sleeve 520 is provided with a convex block 521 to facilitate the user to slide the auxiliary sleeve 520, thereby improving the suction rate of the emulsion pump and accelerating the working efficiency.

[0088] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0089] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A suction-back type emulsion pump with a clogging prevention function, comprising a pump body (100), characterized in that, The pump body (100) includes: A back-suction device (200), including an air extraction pump (210), a reflux pipe (220), and a sealing assembly (230); A filtering device (300), including a filter net (310); A bottle body (400) which is threadedly connected to the pump body (100); A pump head (500), including a liquid outlet pipe (510); A liquid guiding pipe (600); Wherein, the pump head (500) is slidably connected to the pump body (100), and the air extraction pump (210) is connected to the pump body (100).

2. The suck-back type emulsion pump with anti-clogging function according to claim 1, characterized in that The back-suction device (200) includes: An air extraction piston (240) which is connected to the air extraction pump (210); An air extraction pipe (250) which is connected to the air extraction pump (210); A pipe joint (260) which is installed at the pump head (500); A hose (270) which is inserted into the pipe joint (260); Wherein, the air extraction piston (240) is slidably connected to the pump head (500), and the outlet of the air extraction pipe (250) is placed on the upper end face of the bottle body (400).

3. The suck-back type emulsion pump with a clogging prevention function according to claim 2, wherein, The sealing assembly (230) includes: A knob (231), including a trigger (235); A first electromagnet (232), including a first contact (236); A second electromagnet (233), including a second contact (237); A permanent magnet sphere (234); Wherein, the knob (231) is rotatably connected to the pump head (500), the first electromagnet (232) is placed at the liquid guiding pipe (600), the second electromagnet (233) is placed at the reflux pipe (220), the first electromagnet (232) is connected to the permanent magnet sphere (234) after being energized, and the second electromagnet (233) is connected to the permanent magnet sphere (234) after being energized.

4. The suck-back type emulsion pump with a clogging prevention function according to claim 3, wherein The filtering device (300) includes: A housing (320) with a funnel-shaped outer shape; An interface (330) which is placed at the end with a smaller cross-sectional area in the housing (320); Wherein, the filter net (310) is placed at the end with a larger cross-sectional area in the housing (320), and the interface (330) is matched with the liquid guiding pipe (600).

5. The suck-back type emulsion pump with a clogging prevention function according to claim 4, characterized in that, The filter net (310) is provided with liquid seepage holes (311); Wherein, the liquid seepage holes (311) are evenly placed on the filter net (310).

6. The suck-back type emulsion pump with anti-blocking function according to claim 5, characterized in that, The pump head (500) includes: An auxiliary sleeve (520) which is slidably connected to the pump head (500); Wherein, the auxiliary sleeve (520) is provided with a convex block (521).

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