Pump head structure, liquid pump assembly, liquid seasoning module and cooking equipment

Abstract

The utility model discloses a pump head structure, a liquid pump assembly, a liquid seasoning module and cooking equipment. The pump head structure comprises a pump body, and the pump body is provided with a liquid inlet and a liquid outlet; the pump body is arranged in the pump shell, and a liquid inlet butt joint opening is formed in the side wall, opposite to the liquid inlet, of the pump shell; the first pipeline is communicated with the liquid inlet and the liquid inlet butt joint port; wherein the liquid inlets and the liquid inlet butt-joint ports are arranged in a staggered mode, and the first pipeline is provided with a bent structure. Therefore, the mutual influence of the arrangement positions of the liquid inlet and the liquid inlet butt-joint opening can be reduced, the range of the arrangement positions of the liquid inlet and the liquid inlet butt-joint opening is enlarged, the assembly difficulty is reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of kitchen equipment technology, and in particular to a pump head structure, a liquid pump assembly, a liquid seasoning module, and a cooking device. Background Technology

[0002] Current cooking equipment typically includes a liquid seasoning module for dispensing liquid seasonings, such as using a peristaltic pump. In related technologies, the pump head of a peristaltic pump includes a pump housing and a pump body located within the housing. Typically, the inlet connector needs to pass through the pump housing and connect to the inlet port on the pump body. Since the inlet and outlet ports on some pump bodies are located on the same side and adjacent to each other, and the pump body is usually small, the inlet and outlet ports are often located at the edge of the pump body. Therefore, a large installation space is required to connect the inlet connector through the pump housing to the inlet port on the pump body, making assembly difficult. Utility Model Content

[0003] In view of this, the present invention provides a pump head structure, a liquid pump assembly, a liquid seasoning module, and a cooking device. By connecting the liquid inlet of the pump body and the liquid inlet interface of the pump casing through a first pipeline with a bent structure, the mutual influence between the arrangement positions of the liquid inlet and the liquid inlet interface can be reduced, the range of arrangement positions of the liquid inlet and the liquid inlet interface can be increased, the assembly difficulty can be reduced, and the assembly efficiency can be improved.

[0004] An embodiment of the first aspect of this utility model provides a pump head structure, including: a pump body, the pump body being provided with an inlet and an outlet; a pump housing, the pump body being disposed inside the pump housing, and an inlet connector being provided on the side wall of the pump housing opposite to the inlet; a first pipeline, the first pipeline connecting the inlet and the inlet connector; wherein the inlet and the inlet connector are arranged alternately, and the first pipeline is provided with a bending structure.

[0005] Furthermore, the pump head structure also includes: a liquid inlet connector, which is connected to the pump casing and located at the liquid inlet interface. The first end of the liquid inlet connector is located outside the pump casing and configured to communicate with the storage tank, and the second end of the liquid inlet connector is connected to the first pipeline; wherein, the liquid inlet interface is located in the middle of the side wall of the pump casing.

[0006] Furthermore, the pump head structure also includes: a second pipeline, with the inlet and outlet located on the same side of the pump body, and the pump casing also having an outlet-to-outlet interface, the second pipeline connecting the outlet and the outlet-to-outlet interface; wherein the outlet-to-outlet interface and the inlet-to-outlet interface are located on different side walls of the pump casing.

[0007] Furthermore, the inlet and outlet ports are located on opposite side walls of the pump casing, and the second pipeline is configured as a flexible component.

[0008] Furthermore, the pump head structure also includes: a liquid outlet connector, which is connected to the pump housing and located at the liquid outlet interface, with a first end of the liquid outlet connector communicating with a second pipeline and a second end of the liquid outlet connector located outside the pump housing; and at least one first seal, disposed between the liquid outlet connector and the pump housing, the first seal being configured to seal the gap between the liquid outlet connector and the liquid outlet interface.

[0009] Furthermore, the pump head structure also includes: a heating component, which is disposed inside the pump casing and located outside the pump body, and is configured to heat the fluid flowing through the pump body; and an electrical connection wire, which passes through the pump casing and connects to the heating component.

[0010] Furthermore, the pump head structure also includes: an annular diaphragm, a pump shaft, an eccentric wheel, and a first bearing. The annular diaphragm is installed inside the pump body, and its two ends are connected to the pump body. The annular diaphragm and the pump body enclose a sealed space, which is connected to the inlet and outlet. An eccentric wheel located inside the annular diaphragm is installed on the pump shaft, and the first bearing is sleeved on the outside of the eccentric wheel. The pump shaft drives the eccentric wheel to rotate, and the first bearing periodically acts on the annular diaphragm to change the volume of the sealed space.

[0011] Furthermore, the pump head structure also includes: a second seal, which is located at the end of the annular diaphragm and is connected to the pump body and the annular diaphragm to seal the enclosed space; wherein, the periphery of the second seal is provided with a guide slope that contacts the annular diaphragm, and the guide slope is inclined from the outside to the inside of the annular diaphragm toward the direction close to the pump shaft; the second seal is an elastic element, and is configured to deform under external force to provide a force close to the pump body to the annular diaphragm.

[0012] Furthermore, the pump body is configured as a barrel-shaped structure with openings at both ends, and the second seal is at least partially exposed in the openings; wherein the openings include a first opening, the pump body is connected to the pump housing to seal the first opening, and is also configured to deform the second seal exposed in the first opening; and / or the openings include a second opening, the pump head structure further includes a gland located inside the pump housing, the gland is connected to the pump body to seal the second opening, and is also configured to deform the second seal exposed in the second opening; the pump head structure further includes a second bearing disposed at at least one end of the pump shaft.

[0013] Furthermore, the pump housing includes a detachably connected base and a cover. The pump body is mounted on the base, and the inlet and outlet are located on the side of the pump body facing the cover. The inlet interface is located on the cover, and the outlet interface is located on the base. A through hole opposite to the pump shaft is opened on the side of the base away from the cover. A boss is provided around the through hole, and a limiting structure matching the housing of the drive unit is provided on the boss.

[0014] A second aspect of this utility model provides a liquid pump assembly, including: a pump head structure as described in any of the preceding claims; the liquid pump assembly further includes a drive unit, which is separately disposed from the pump head structure, and the drive unit is configured to be dynamically connected to the pump shaft of the pump head structure.

[0015] A third aspect of this utility model provides a liquid seasoning module, including: a storage tank and the aforementioned liquid pump assembly, wherein the inlet connector of the pump head structure is configured to communicate with the storage tank; the storage tank is provided with a connecting connector, which is configured to communicate with the inlet connector, a first mating part is provided on the inlet connector, and the connecting connector and / or the storage tank is provided with a second mating part, the first mating part and the second mating part being connected or separated by magnetic attraction; the storage tank is provided with a notch structure, the connecting connector being located within the notch structure, the shape of the notch structure matching the shape of the pump head structure to accommodate at least part of the pump head structure.

[0016] A fourth aspect of this utility model provides a cooking device, including: a device body and the aforementioned liquid seasoning module, wherein the device body is provided with a liquid outlet, which is configured to communicate with the liquid outlet connector of the pump head structure.

[0017] The pump head structure, liquid pump assembly, liquid seasoning module, and cooking equipment provided in this embodiment of the utility model include a pump body, a pump housing, and a first pipeline. The pump body is disposed inside the pump housing and has a liquid inlet. The pump housing has a liquid inlet interface. The first pipeline, which has a bend structure, can smoothly connect the staggered liquid inlets and liquid inlets, ensuring that external liquid flows smoothly into the pump body through the liquid inlet interface on the pump housing, the first pipeline, and the liquid inlet of the pump body. The staggered arrangement of the liquid inlets and liquid inlets reduces the mutual influence of their placement positions, increases the range of their placement positions, helps save assembly space, and reduces the layout difficulty, assembly difficulty, and processing difficulty of the liquid inlets and / or liquid inlets, thereby improving the assembly efficiency and / or processing efficiency of the pump head structure.

[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0020] Figure 1 One of the schematic diagrams of the pump head structure provided in the embodiment of this utility model is shown;

[0021] Figure 2 An exploded view of one of the pump head structures provided in an embodiment of the present invention is shown;

[0022] Figure 3 A cross-sectional view of the pump head structure provided in an embodiment of the present invention is shown;

[0023] Figure 4 A second schematic diagram of the pump head structure provided in an embodiment of this utility model is shown;

[0024] Figure 5 One of the partial structural schematic diagrams of the pump head structure provided in an embodiment of the present invention is shown;

[0025] Figure 6 One of the structural schematic diagrams of the liquid seasoning module provided in the embodiment of this utility model is shown;

[0026] Figure 7 One of the structural schematic diagrams of the liquid seasoning module provided in the embodiment of this utility model is shown;

[0027] Figure 8 One of the exploded schematic diagrams of the liquid seasoning module provided in the embodiment of this utility model is shown;

[0028] Figure 9 This is a second exploded view of the liquid seasoning module provided in an embodiment of the present invention.

[0029] in, Figures 1 to 9 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0030] 100 Pump head structure, 110 Pump body, 111 Inlet, 112 Outlet, 113 Second opening, 115 Connector, 120 Pump housing, 121 Inlet connector, 122 Outlet connector, 123 Base, 1231 Through hole, 1232 Boss, 1233 Limiting structure, 124 Cover, 130 First pipeline, 131 Bending structure, 132 Inlet connector, 133 Clamp, 134 First mating part, 140 The... Two pipelines, 141 liquid outlet connector, 142 first seal, 143 snap ring, 150 heating assembly, 151 electrical connection wire, 160 annular diaphragm, 170 pump shaft, 171 eccentric wheel, 172 first bearing, 173 second bearing, 174 first spline structure, 180 second seal, 181 guide ramp, 190 pressure cap, 200 liquid seasoning module, 210 storage tank, 211 connecting connector, 212 notch structure. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0033] The following reference Figures 1 to 9 This invention describes a pump head structure 100, a liquid pump assembly, a liquid seasoning module 200, and a cooking device according to some embodiments of the present invention. The pump head structure 100 is applied to the liquid pump assembly, the liquid pump assembly is applied to the liquid seasoning module 200, and the liquid seasoning module 200 is applied to the cooking device, which can be a stir-fry machine or other kitchen equipment. The cooking device can dispense liquid seasonings through the liquid seasoning module 200.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the first aspect of this utility model provides a pump head structure 100, including: a pump body 110, which is provided with an inlet 111 and an outlet 112; a pump housing 120, which is disposed inside the pump body 110, and an inlet interface 121 is provided on the side wall of the pump housing 120 opposite to the inlet 111; and a first pipeline 130, which connects the inlet 111 and the inlet interface 121; wherein the inlet 111 and the inlet interface 121 are arranged alternately, and the first pipeline 130 is provided with a bending structure 131.

[0035] The pump head structure 100 provided in this embodiment includes a pump body 110, a pump housing 120, and a first pipeline 130. The pump body 110 is disposed inside the pump housing 120, so that the external pump housing 120 can provide good protection for the pump body 110, which is beneficial to extending the service life of the pump body 110. The pump body 110 is provided with an inlet 111 and an outlet 112 for the liquid flowing through the pump body 110 to circulate through the inlet 111 and the outlet 112. The pump housing 120 is provided with an inlet interface 121, which is connected to the inlet 111 and the inlet interface 121 through the first pipeline 130. Thus, external liquid can flow into the pump body 110 through the inlet interface 121 on the pump housing 120, the first pipeline 130, and the inlet 111 of the pump body 110, realizing the liquid intake operation of the pump body 110.

[0036] The liquid inlet interface 121 is located on the side wall opposite to the liquid inlet 111 of the pump housing 120, making the distance between the liquid inlet 111 and the liquid inlet interface 121 relatively short. In this way, the liquid inlet 111 and the liquid inlet interface 121 can be connected by the short first pipe 130, which helps to reduce the material used in the first pipe 130, save costs, and at the same time, it can reduce the space occupied by the first pipe 130, which can meet the design requirements of compact layout and small size of pump head structure 100.

[0037] The liquid inlet 111 and the liquid inlet interface 121 are arranged alternately, and the first pipeline 130 is provided with a bending structure 131. Thus, the first pipeline 130 with the bending structure 131 can smoothly connect the alternately arranged liquid inlet 111 and the liquid inlet interface 121, so as to ensure that the external liquid flows smoothly into the pump body 110 through the liquid inlet interface 121 on the pump housing 120, the first pipeline 130, and the liquid inlet 111 of the pump body 110. The staggered arrangement of the inlet 111 and the inlet interface 121 reduces the mutual influence between their positions. For example, it reduces the coaxiality requirements of the inlet 111 and the inlet interface 121 during processing, thereby reducing the restrictions on their positions and increasing the range of their positions. This allows the positions of the inlet 111 and / or the inlet interface 121 to meet layout, assembly, and processing requirements, which helps save assembly space and reduces the layout, assembly, and processing difficulties of the inlet 111 and / or the inlet interface 121, thereby improving the assembly and / or processing efficiency of the pump head structure 100.

[0038] As in the pump head structure of related technologies, the inlet and outlet of the pump body are located on the same side of the pump body and are adjacent to each other. Since the volume of the pump body is usually small, the inlet and outlet are usually located at the edge of the pump body. Therefore, a large installation space is required to connect the inlet connector through the pump casing to the inlet on the pump body 110.

[0039] like Figure 2 and Figure 3 As shown, the embodiment provided by this utility model connects the liquid inlet interface 121 on the pump housing 120 and the liquid inlet 111 on the pump head through the first pipeline 130 with a bending structure 131. This allows the liquid inlet 111 and the liquid inlet interface 121 to be arranged alternately, thereby allowing the liquid inlet interface 121 to be positioned without being restricted by the liquid inlet 111. The liquid inlet interface 121 can be arranged in a position that is convenient for assembly, thereby saving assembly space, reducing the assembly difficulty of components connected to the liquid inlet interface 12 (such as the first pipeline 130 and the liquid inlet connector 132 mentioned later), and improving assembly efficiency.

[0040] The bending structure 131 can be at least one of Z-shape, S-shape, and N-shape.

[0041] The first pipeline 130 is a flexible component, possessing significant adaptability to deformation. By incorporating a bending structure 131 within the flexible first pipeline 130, the combination of the flexible component and the bending structure 131 further enhances its adaptability to deformation. This reduces the requirements for the placement of the inlet 111 and the inlet interface 121, while increasing the range of their placement. This allows the first pipeline 130 to smoothly connect the staggered inlets 111 and inlet interfaces 121. Simultaneously, the flexible first pipeline 130 exhibits excellent waterproof sealing performance and corrosion resistance, which helps extend its service life, thereby improving the reliability and service life of the pump head structure 100. Specifically, the first pipeline 130 is a flexible hose.

[0042] like Figure 1 , Figure 2 and Figure 3 As shown, in some possible embodiments provided by this utility model, the pump head structure 100 further includes: a liquid inlet connector 132, which is connected to the pump housing 120 and located at the liquid inlet interface 121. The first end of the liquid inlet connector 132 is located outside the pump housing 120 and is configured to communicate with the storage tank 210. The second end of the liquid inlet connector 132 is connected to the first pipeline 130. The liquid inlet interface 121 is located in the middle of the side wall of the pump housing 120.

[0043] The storage tank 210 is used to contain liquid, such as liquid seasoning. It is connected to the pump housing 120 via the inlet connector 132 at the inlet interface 121. The inlet connector 132 connects the storage tank 210 and the first pipeline 130. Thus, when the pump body 110 is working, the liquid in the storage tank 210 flows into the pump body 110 through the inlet connector 132, the inlet interface 121, the first pipeline 130, and the inlet 111.

[0044] In this embodiment, the inlet interface 121 is located in the middle of the side wall of the pump housing 120, that is, the end of the first pipeline 130 connected to the inlet port is located in the middle of the side wall of the pump housing 120. Compared with the situation where the inlet interface 121 is located at the edge of the side wall of the pump housing 120, which makes the assembly space of the inlet connector 132 narrow and limited, this arrangement provides a larger assembly space for the assembly operation of the inlet connector 132 and the inlet interface 121, and the assembly operation of the inlet connector 132 and the first pipeline 130. This facilitates the assembly operation of the inlet connector 132 and the inlet interface 121, and the inlet connector 132 and the first pipeline 130, which helps to reduce the assembly difficulty and improve the assembly efficiency.

[0045] Furthermore, the inlet connector 132 is detachably connected to the pump housing 120, facilitating the disassembly and separation of the inlet connector 132 from the pump housing 120 for maintenance and replacement of parts. This improves maintenance efficiency and saves on replacement costs. Specifically, the inlet connector 132 can be detachably connected to the pump housing 120 via at least one of the following methods: bolt structure, plug-in structure, snap-fit ​​structure, tenon and mortise structure, or magnetic structure. It is understood that in some examples, the inlet connector 132 can also be fixedly connected to the pump housing 120 by adhesive, welding, or other methods.

[0046] Furthermore, the inlet connector 132 is detachably connected to the storage tank 210, facilitating the disassembly and separation of the inlet connector 132 and the storage tank 210 for maintenance and replacement of parts. This improves maintenance efficiency and saves on replacement costs. Specifically, the inlet connector 132 can be detachably connected to the storage tank 210 via at least one of the following methods: bolt structure, plug-in structure, snap-fit ​​structure, tenon and mortise structure, or magnetic structure. It is understood that in some examples, the inlet connector 132 can also be fixedly connected to the storage tank 210 by adhesive, welding, or other methods.

[0047] like Figure 2 , Figure 3 and Figure 5 As shown, in some possible embodiments provided by this utility model, the pump head structure 100 further includes: a second pipeline 140, with the inlet 111 and the outlet 112 located on the same side of the pump housing 120, and the pump housing 120 also having an outlet connection interface 122, the second pipeline 140 connecting the outlet 112 and the outlet connection interface 122.

[0048] In this embodiment, the pump casing 120 is provided with a liquid outlet interface 122, and the second pipeline 140 connects the liquid outlet interface 122 and the liquid outlet 112. Thus, when the pump body 110 is working, the liquid entering the pump body 110 can be discharged to the outside of the pump casing 120 through the liquid outlet 112, the second pipeline 140, and the liquid outlet interface 122, so as to realize the liquid feeding operation.

[0049] The inlet 111 and outlet 112 are located on the same side of the pump housing 120, which facilitates the processing of the inlet 111 and outlet 112 at the same processing station of the pump body 110, which helps to improve processing efficiency. At the same time, it enables the assembly connection of the first pipeline 130 to the inlet 111 and the assembly connection of the second pipeline 140 to the outlet 112 at the same assembly station, which helps to improve the assembly efficiency of the pump head structure 100.

[0050] The outlet port 122 and the inlet port 121 are located on different side walls of the pump body 110, allowing the inlet connector 132 at the inlet port 121 and the outlet connector 141 at the outlet port 122 to be assembled from different directions of the pump housing 120. This provides ample assembly space for the inlet connector 132 and the outlet connector 141, reducing their assembly difficulty, increasing their assembly efficiency, and improving the overall assembly efficiency of the pump head structure 100. Furthermore, this arrangement allows the storage tank 210 connected to the inlet connector 132 and the device connected to the outlet connector 141 to be positioned on different sides of the pump housing 120, achieving a rational layout.

[0051] Specifically, the inlet port 121 and the outlet port 122 can be located on two adjacent side walls of the pump housing 120, or the inlet port 121 and the outlet port 122 can be located on two opposite side walls of the pump housing 120.

[0052] like Figure 2 As shown, in some possible embodiments provided by this utility model, the inlet port 121 and the outlet port 122 are located on two opposite side walls of the pump housing 120, and the second pipeline 140 is configured as a flexible component.

[0053] In this embodiment, by arranging the inlet port 121 and the outlet port 122 on two opposite side walls of the pump housing 120, the inlet connector 132 and the outlet connector 141 of the pump head structure 100 are located on opposite sides of the pump head structure 100. For example, the inlet connector 132 and the outlet connector 141 of the pump head structure 100 can be located on the front and rear sides, left and right sides, or top and bottom sides of the pump head structure 100. Thus, the inlet connector 132 and the outlet connector 141 can be assembled from opposite sides of the pump head structure 100, providing a larger assembly space for the assembly of the inlet connector 132 and the outlet connector 141. This helps to reduce the assembly difficulty of the inlet connector 132 and the outlet connector 141, improve the assembly efficiency of the inlet connector 132 and the outlet connector 141, and improve the overall assembly efficiency of the pump head structure 100. At the same time, the storage tank 210 connected to the inlet connector 132 and the device connected to the outlet connector 141 can be arranged on different sides of the pump head structure 100 to achieve a reasonable layout.

[0054] Furthermore, since the outlet 112 and the inlet 111 are located on the same side of the pump body 110, and the inlet port 121 and the outlet port 122 are located on opposite side walls of the pump casing 120, with the inlet port 121 located on the side wall of the pump casing 120 opposite to the inlet port 111, the side wall of the pump casing 120 where the outlet port 122 is located is not opposite to the side wall of the pump body 110 where the outlet port 112 is located. Therefore, by setting the second pipeline 140 as a flexible component, the flexible second pipeline 140 has a greater ability to adapt to deformation, thereby reducing the requirements for the arrangement position of the outlet 112 and the outlet port 122 and increasing the range of the arrangement position of the outlet 112 and the outlet port 122, so that the flexible second pipeline 140 can smoothly connect the outlet 112 and the outlet port 122. Meanwhile, the flexible second conduit 140 has good waterproof sealing performance and corrosion resistance, which helps to extend the service life of the second conduit 140, thereby improving the reliability of the pump head structure 100 and extending its service life. Specifically, the second conduit 140 is a flexible hose.

[0055] Furthermore, such as Figure 2 As shown, the inlet connector 132 is fixed to the inlet interface 121 of the pump housing 120 by a retaining ring 143. The inlet connector 132 is designed with a pagoda structure for installing the first pipeline 130. Among them, the connection position of the first pipeline 130 with the inlet connector 132 and the inlet port 111 is provided with an elastic clamp 133 to prevent detachment and improve the reliability of the connection between the first pipeline 130 and the inlet connector 132 and the inlet port 111.

[0056] like Figure 2 and Figure 3As shown, in some possible embodiments provided by this utility model, the pump head structure 100 further includes: a liquid outlet connector 141, which is connected to the pump housing 120 and located at the liquid outlet interface 122. The first end of the liquid outlet connector 141 is connected to the second pipeline 140, and the second end of the liquid outlet connector 141 is located outside the pump housing 120. Thus, when the pump body 110 is working, the liquid in the pump body 110 is discharged to the outside of the pump housing 120 through the liquid outlet 112, the second pipeline 140, and the liquid outlet connector 141, thereby realizing the liquid feeding operation of the pump head structure 100.

[0057] Specifically, when the pump body 110 of the pump head structure 100 is working, the liquid in the storage tank 210 flows into the interior of the pump body 110 through the inlet connector 132, the inlet interface 121, the first pipeline 130, and the inlet port 111, and is discharged to the outside of the pump head structure 100 through the outlet port 112, the second pipeline 140, the outlet interface 122, and the outlet connector 141, so as to realize the liquid feeding operation of the pump head structure 100.

[0058] like Figure 2 As shown, in the above embodiment, the pump head structure 100 further includes at least one first seal 142 disposed between the liquid outlet connector 141 and the pump housing 120. The first seal 142 is configured to seal the gap between the liquid outlet connector 141 and the liquid outlet interface 122. The provision of the first seal 142 can improve the sealing performance at the connection position between the liquid outlet connector 141 and the liquid outlet interface 122, reduce the risk of liquid or air leakage at the connection position between the liquid outlet connector 141 and the liquid outlet interface 122, and improve the reliability of the pump head structure 100.

[0059] The first sealing element 142 can be a sealing ring, sealing cotton, or other sealing structure.

[0060] The number of first sealing elements 142 can be one, two, or more, to meet different sealing requirements at the connection position between the liquid outlet connector 141 and the liquid outlet interface 122. It is understood that the more first sealing elements 142 there are, the better the sealing performance. Specifically, there are two first sealing elements 142, each a sealing ring. These two sealing rings significantly improve the sealing performance at the connection position between the liquid outlet connector 141 and the liquid outlet interface 122.

[0061] like Figure 2As shown, the outlet connector 141 is further fixed to the outlet interface 122 of the pump housing 120 by a snap ring 143, and the outlet connector 141 is designed with a pagoda structure for installing the second pipeline 140. Elastic clamps 133 are provided at the connection points between the second pipeline 140 and the outlet connector 141 and the outlet 112 to prevent detachment and improve the reliability of the connection between the second pipeline 140 and the outlet connector 141 and the outlet 112.

[0062] like Figure 2 , Figure 3 and Figure 5 As shown, in some possible embodiments provided by this utility model, the pump head structure 100 further includes a heating component 150, which is disposed inside the pump housing 120 and located outside the pump body 110. The heating component 150 is configured to heat the fluid flowing through the pump body 110.

[0063] Therefore, by using the heating component 150, the fluid flowing through the pump body 110 can be heated and kept warm, so that the liquid output by the pump head structure 100 is heated, thereby improving the cooking quality. At the same time, it can reduce the possibility of the liquid flowing through the pump head structure 100 freezing or solidifying in a low-temperature environment, improve the smoothness of liquid delivery by the pump head structure 100, and enable the pump head structure 100 to meet the usage requirements of low-temperature environments, thus expanding its application range.

[0064] The heating component 150 can be a heating wire, a heating tube, or other heating structure. The heating component 150 can be connected to the pump body 110, or the heating component 150 can be connected to the pump housing 120.

[0065] like Figure 5 As shown, in the above embodiment, the pump head structure 100 further includes an electrical connection wire 151, which passes through the pump housing 120 and connects to the heating assembly 150. The electrical connection wire 151 enables the heating assembly 150 to be smoothly connected to an external power source to supply power to the heating assembly 150.

[0066] The electrical connection wire 151 passes through the pump housing 120, with one end of the electrical connection wire 151 located inside the pump housing 120 and electrically connected to the heating component 150, and the other end of the electrical connection wire 151 located outside the pump housing 120 for connection to an external power source. It can be understood that, depending on the application scenario of the pump head structure 100 and whether heating of the output liquid is required, the end of the electrical connection wire 151 located outside the pump housing 120 can be selectively connected to an external power source, thereby increasing the applicability of the pump head structure 100.

[0067] Specifically, when the ambient temperature of the pump head structure 100 is low, there is a possibility that the liquid inside the pump head structure 100 may freeze or solidify, or when it is necessary to heat the liquid output from the pump head structure 100, the end of the electrical connection cable 151 located outside the pump housing 120 can be connected to an external power source to supply power to the heating component 150, enabling the heating component 150 to operate smoothly and heat the liquid flowing through the pump body 110. When the ambient temperature of the pump head structure 100 is high, there is no possibility that the liquid may freeze or solidify, or when it is not necessary to heat the liquid output from the pump head structure 100, the end of the electrical connection cable 151 located outside the pump housing 120 can be disconnected from the external power source, so that the heating component 150 does not need to operate.

[0068] Specifically, the end of the electrical connection wire 151 located outside the pump housing 120 is connected to a plug for easy connection to an external power source with a socket via a plug-and-play method, making operation convenient. Specifically, the plug can be a DC plug, and the socket can be a DC socket.

[0069] like Figure 2 , Figure 3 As shown, in some possible embodiments provided by this utility model, the pump head structure 100 further includes: an annular diaphragm 160, a pump shaft 170, an eccentric wheel 171, and a first bearing 172. The annular diaphragm 160 is installed inside the pump body 110, and its two ends are connected to the pump body 110. The annular diaphragm 160 and the pump body 110 enclose a sealed space, that is, the outer wall of the pump body 110 and the inner wall of the annular diaphragm 160 enclose a sealed space. The sealed space communicates with the inlet 111 and the outlet 112. An eccentric wheel 171 located inside the annular diaphragm 160 is installed on the pump shaft 170. The first bearing 172 is sleeved on the outside of the eccentric wheel 171. The pump shaft 170 drives the eccentric wheel 171 to rotate, and the first bearing 172 periodically acts on the annular diaphragm 160 to change the volume of the sealed space, thereby realizing the intake and discharge of liquid.

[0070] Specifically, when the volume of the sealed space increases, a negative pressure is created that draws in liquid, allowing the liquid to enter the sealed space through the inlet 111; when the volume of the sealed space decreases, the liquid is discharged, allowing the liquid in the sealed space to be discharged through the outlet 112. Thus, the pump shaft 170 drives the eccentric wheel 171 to rotate, and the first bearing 172, which is sleeved outside the eccentric wheel 171, periodically acts on the annular diaphragm 160 to change the volume of the sealed space, so that the pump head structure 100 can periodically realize the intake and discharge of liquid, thereby drawing the liquid in the storage tank 210 into the pump body 110 through the inlet connector 132, the inlet interface 121, the first pipeline 130, and the inlet 111, and discharging it to the outside of the pump head structure 100 through the outlet 112, the second pipeline 140, the outlet interface 122, and the outlet connector 141, thereby realizing the liquid feeding operation of the pump head structure 100.

[0071] like Figure 2 and Figure 3 As shown, in some possible embodiments provided by this utility model, the pump head structure 100 further includes a second sealing member 180. The second sealing member 180 is located at the end of the annular diaphragm 160 and is connected to the pump body 110 and the annular diaphragm 160 to seal the enclosed space. The second sealing member 180 is used to seal the gap between the pump body 110 and the annular diaphragm 160, which helps to improve the sealing performance of the enclosed space, reduce air leakage in the enclosed space that affects the reliability of the pump head structure 100 in sucking in or discharging liquid, and improve the reliability of the pump head structure 100.

[0072] like Figure 2 As shown, in the above embodiment, the second seal 180 is provided with a guide slope 181 on its periphery that contacts the annular diaphragm 160. The guide slope 181 is inclined from the outside to the inside of the annular diaphragm 160 toward the pump shaft 170. The second seal 180 is an elastic member and is configured to deform under external force to provide a force to the annular diaphragm 160 that is close to the pump body 110.

[0073] In this embodiment, since the second seal 180 seals the gap between the annular diaphragm 160 and the pump body 110 by sealing the end of the annular diaphragm 160, a guide slope 181 is provided on the periphery of the second seal 180. In a direction parallel to the pump shaft 170, the guide slope 181 is inclined from the outside to the inside of the annular diaphragm 160 towards the pump shaft 170. That is, the distance between the guide slope 181 located inside the annular diaphragm 160 and the pump shaft 170 is smaller, while the distance between the guide slope 181 located at the edge or outside of the annular diaphragm 160 and the pump shaft 170 is larger. The second seal 180 is an elastic element and contacts the annular diaphragm 160. Under the action of external force, the second seal 180 deforms, and under the action of the guide slope 181, the annular diaphragm 160 moves closer to the pump body 110, thereby achieving the purpose of sealing, improving the sealing performance at the connection between the annular diaphragm 160 and the pump body 110, and improving the sealing performance of the enclosed space.

[0074] Furthermore, the second seal 180 is an expansion plug with a bevel. When the expansion plug is pressed, it will squeeze the annular part to move towards the inner surface of the pump body 110 to achieve the purpose of sealing.

[0075] like Figure 2 and Figure 3 As shown, in some possible embodiments provided by this utility model, the pump body 110 is configured as a barrel-shaped structure with openings at both ends, and the second seal 180 is at least partially exposed in the openings, wherein the openings include a first opening, the pump body 110 is connected to the pump housing 120 to seal the first opening, and is also configured to deform the second seal 180 exposed in the first opening; and / or the openings include a second opening 113, and the pump head structure 100 also includes a gland 190 located inside the pump housing 120, the gland 190 is connected to the pump body 110 to seal the second opening 113, and is also configured to deform the second seal 180 exposed in the second opening 113.

[0076] In this embodiment, the pump body 110 has a barrel-shaped structure with a first opening and a second opening 113 at its two ends. The pump body 110 is connected to the pump housing 120 to seal the first opening, and the pump body 110 is connected to the pressure cap 190 to seal the second opening 113. The annular diaphragm 160 is located outside the pump body 110 and is connected to the pump body 110. The second seal 180 is at least partially exposed in the opening. Since there are two openings, the number of second seals 180 can be one or two. One second seal 180 may be at least partially exposed in the first opening to seal the gap between the pump body 110 and the annular diaphragm 160 at the first opening; or, one second seal 180 may be at least partially exposed in the second opening 113 to seal the gap between the pump body 110 and the annular diaphragm 160 at the second opening 113. Alternatively, two second seals 180 may be exposed in the first opening and the second opening 113 respectively to seal the gaps between the pump body 110 and the annular diaphragm 160 at the first opening and the gaps between the pump body 110 and the annular diaphragm 160 at the second opening 113, respectively.

[0077] Among them, such as Figure 2 and Figure 3 As shown, during the process of connecting the pump body 110 and the pump housing 120 to seal the first opening, the pump body 110 is also configured to deform the second seal 180 exposed in the first opening. That is, the connection between the pump body 110 and the pump housing 120 can seal the first opening, and during the connection process, a force is applied to the second seal 180 exposed in the first opening to deform it. This causes the annular diaphragm 160 to move closer to the pump body 110 to achieve a seal, thereby improving the sealing performance between the annular diaphragm 160 and the pump body 110 at the first opening. Specifically, the pump body 110 and the pump housing 120 can be connected by at least one of the following: bolt structure, snap-fit ​​structure, plug-in structure, tenon and mortise structure, and magnetic structure.

[0078] Among them, such as Figure 2 , Figure 3 and Figure 5As shown, during the process of connecting the gland 190 to the pump body 110 to seal the second opening 113, it is also configured to deform the second seal 180 exposed in the second opening 113. That is, the connection between the gland 190 and the pump body 110 can seal the second opening 113, and during the connection process, the gland 190 applies a force to the second seal 180 exposed in the second opening 113 to cause deformation of the second seal 180. This causes the annular diaphragm 160 to move closer to the pump body 110 to achieve a seal, thereby improving the sealing performance between the annular diaphragm 160 and the pump body 110 at the second opening 113. Specifically, the gland 190 and the pump body 110 can be connected by at least one of the following: bolt structure, snap-fit ​​structure, plug-in structure, tenon structure, and magnetic structure.

[0079] Specifically, such as Figure 2 As shown, the gland 190 and the pump body 110 are detachably connected by bolts to facilitate the disassembly and assembly of the gland 190 and the pump body 110, and to facilitate the disassembly, assembly and maintenance of the pump head structure 100.

[0080] like Figure 2 and Figure 3 As shown, in some possible embodiments provided by this utility model, the pump head structure 100 further includes a second bearing 173, which is disposed at at least one end of the pump shaft 170. The second bearing 173 improves the stability and smoothness of the rotation of the pump shaft 170 relative to the pump body 110.

[0081] Specifically, the first end of the pump shaft 170 can be rotatably connected to the pump body 110 via the second bearing 173, and the second end of the pump shaft 170 can be suspended in the air. Alternatively, the second end of the pump shaft 170 can be rotatably connected to the gland 190 via the second pump shaft 170. It is understood that having the second bearing 173 at both ends of the pump shaft 170 can greatly improve the stability of the pump shaft 170's rotation.

[0082] like Figure 3 and Figure 4 As shown, in some possible embodiments provided by this utility model, the pump housing 120 includes a detachably connected base 123 and a cover 124. This arrangement facilitates the disassembly, assembly, and maintenance of components such as the pump body 110, the first pipeline 130, the second pipeline 140, the annular diaphragm 160, the pump shaft 170, the eccentric wheel 171, the second seal 180, and the gland 190 located within the pump housing 120. This improves the maintenance efficiency of the entire pump head structure 100 and saves on replacement costs. It is understood that the base 123 and the cover 124 can be detachably connected using at least one of the following methods: bolt structure, snap-fit ​​structure, plug-in structure, tenon and mortise structure, and magnetic attraction structure.

[0083] In the above embodiment, the pump body 110 is mounted on the base 123. The inlet 111 and outlet 112 are located on the side of the pump body 110 facing the cover 124, so that the inlet 111 and outlet 112 are on the same side of the pump head. The inlet interface 121 is disposed on the cover 124, so that the inlet interface 121 and the inlet 111 are close to each other, and can be smoothly connected through the first pipeline 130. The outlet interface 122 is disposed on the base 123, so that the outlet interface 122 and the inlet interface 121 are located on different sides of the pump housing 120, so that the inlet and outlet of the entire pump head structure 100 are located on different sides of the pump housing 120, thereby achieving a reasonable layout. The distance between the liquid outlet 122 and the liquid outlet 112 is relatively far. The liquid outlet 122 and the liquid outlet 112 can be smoothly connected through the second pipeline 140 of the flexible component.

[0084] like Figure 4 As shown, in the above embodiment, the seat 123 has a through hole 1231 opposite to the pump shaft 170 on the side away from the cover 124. A boss 1232 is provided on the periphery of the through hole 1231. A limiting structure 1233 matching the housing of the drive unit is provided on the boss 1232.

[0085] In this embodiment, the liquid pump assembly includes a drive unit, which includes an output shaft and a housing. The through hole 1231 on the base 123 facilitates the output shaft of the drive unit to extend into the interior of the pump housing 120 through the through hole 1231 and be powered to connect with the pump shaft 170, thereby causing the output shaft of the drive unit to rotate and drive the pump shaft 170 to rotate.

[0086] like Figure 4 As shown, the limiting structure 1233 on the boss 1232 around the through hole 1231 matches the housing of the drive unit, which plays a good limiting role in the movement of the housing of the drive unit relative to the pump housing 120. The relative position of the housing of the drive unit and the output shaft can be determined by the design of the drive unit, and the relative position of the pump shaft 170 and the pump housing 120 can be determined by the design of the pump head structure 100. Thus, by matching the limiting structure 1233 with the housing of the drive unit, the movement of the housing of the drive unit relative to the pump housing 120 is limited, which can realize the pre-positioning of the assembly of the output shaft of the drive unit and the pump shaft 170. This is beneficial to improve the accuracy and speed of the power connection between the output shaft of the drive unit and the pump shaft 170, and facilitates maintenance and parts replacement.

[0087] Specifically, the limiting structure 1233 can be a concave part, a convex part, or a concave part and a convex part.

[0088] A second aspect of this utility model provides a liquid pump assembly, including a pump head structure 100 of any of the embodiments in the first aspect. Since the liquid pump assembly includes the pump head structure 100 of any of the aforementioned embodiments, it possesses all the technical effects of the aforementioned pump head structure 100, which will not be elaborated further here.

[0089] In some possible embodiments, the liquid pump assembly further includes a drive unit that is separately disposed from the pump head structure 100. The drive unit is configured to be poweredly connected to the pump shaft 170 of the pump head structure 100, thereby enabling the drive unit to operate and drive the pump shaft 170 to rotate.

[0090] Among them, the liquid pump components in the related technologies usually have the drive unit and pump head structure integrated into one piece. However, during use, the pump head structure is easily damaged, while the drive unit is almost never damaged. Each time the whole unit is replaced, after-sales personnel need to come to the site to open the back cover of the cooking equipment for replacement. The replacement involves connecting pipes and circuits, which is time-consuming and labor-intensive. The undamaged drive unit can only be scrapped together, which is costly.

[0091] In this embodiment, the drive unit and the pump head structure 100 are separately configured, facilitating disassembly and separation for separate maintenance of each component. Compared to related technologies where the drive unit and pump head structure are integrated, this design simplifies maintenance and reduces or avoids the need to replace the entire drive unit and pump head due to a fault. In this embodiment, the faulty pump head structure 100 or faulty drive unit can be replaced individually after disassembly, saving on maintenance and replacement costs. Furthermore, this design allows users to directly replace the pump head themselves after damage, eliminating the need for on-site after-sales service, simplifying operations and reducing after-sales costs.

[0092] Specifically, such as Figure 2 and Figure 3 As shown, the output shaft of the drive unit and the pump shaft 170 of the pump head structure 100 can be connected via a splined shaft to transmit power. The second splined structure of the splined shaft is mounted on the output shaft of the drive unit, and the first splined structure 174 of the splined shaft is connected to the pump shaft 170. When the pump head structure 100 is inserted into the output shaft of the drive unit, the output shaft of the drive unit and the pump shaft 170 rotate synchronously, thus enabling the operation of the pump head structure 100. If the pump head structure 100 fails, the user can directly pull it out of the output shaft of the drive unit for replacement; the operation is convenient and the replacement is simple. Specifically, the drive unit can be a motor or other drive structure.

[0093] like Figure 6 , and 7, and 8 and Figure 9As shown, an embodiment of the third aspect of this utility model provides a liquid seasoning module 200, including: a storage tank 210 and a liquid pump assembly of the second aspect, wherein the inlet connector 132 of the pump head structure 100 is configured to communicate with the storage tank 210. Since the liquid seasoning module 200 includes the liquid pump assembly of any of the foregoing embodiments, it has all the technical effects of the aforementioned liquid pump assembly, which will not be described in detail here.

[0094] In the above embodiment, the storage tank 210 is provided with a connecting joint 211, which is configured to communicate with the liquid inlet joint 132. The liquid inlet joint 132 is provided with a first mating part 134, and the connecting joint 211 and / or the storage tank 210 are provided with a second mating part. That is, the second mating part can be provided on the connecting joint 211, or on the storage tank 210, or on both the connecting joint 211 and the storage tank 210. Thus, the first mating part 134 and the second mating part are connected or separated by magnetic attraction, which can realize the connection or separation of the connecting joint 211 and the liquid inlet joint 132. This facilitates disassembly and assembly, simplifies the operation of tightening bolts, and improves the disassembly and assembly efficiency of the connecting joint 211 and the liquid inlet joint 132, thereby improving the disassembly and assembly efficiency of the liquid seasoning module 200.

[0095] The first mating component 134 and the second mating component are connected or separated by magnetic attraction. This can be understood as either the first mating component 134 or the second mating component being a permanent magnet, or one of the first mating component 134 and the second mating component being a permanent magnet and the other a soft magnet. Permanent magnets are generally made of steel, and their magnetic properties are permanently maintained. Soft magnets refer to magnets made of materials such as iron, and their magnetism cannot be permanently maintained.

[0096] like Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown in the above embodiment, the storage tank 210 is provided with a notch structure 212, and the connecting joint 211 is located within the notch structure 212. The shape of the notch structure 212 matches the shape of the pump head structure 100 to accommodate at least a portion of the pump head structure 100. This allows for a compact layout of the storage tank 210 and the pump head structure 100. While maintaining the same space occupied by the liquid seasoning module 200, the volume of the storage tank 210 is maximized, enabling the storage tank 210 to store a larger amount of liquid seasoning using its space, thereby reducing the frequency of refilling the storage tank 210 and simplifying user operation.

[0097] Understandably, as the volume of the liquid pump assembly decreases, the corresponding size of the storage tank 210 is also further reduced. In order to maximize the use of space, a notch structure 212 is provided on the storage tank 210 so that the bottom of the storage tank 210 extends backward to the bottom of the liquid pump assembly, which can maximize the use of space to store more liquid seasonings.

[0098] A fourth aspect of this utility model provides a cooking device, comprising: a device body and a liquid seasoning module 200 provided in the embodiment of the third aspect. The device body is provided with a liquid outlet, which is configured to communicate with the liquid outlet connector 141 of the pump head structure 100. Since the cooking device includes the aforementioned liquid seasoning module 200, it has all the technical effects of the aforementioned liquid seasoning module 200, which will not be described in detail here.

[0099] In this system, the drive unit in the liquid seasoning module 200 operates, driving the pump head structure 100 to operate. The liquid seasoning contained in the storage tank 210 is drawn into the pump body 110 through the connecting connector 211, inlet connector 132, first pipeline 130, and inlet port 111. It is then delivered and dispensed through the outlet port 112, second pipeline 140, outlet connector 141, and outlet component. If the cooking equipment also includes a pot, the liquid seasoning module 200 can dispense the liquid seasoning from the outlet component into the pot, thus achieving the dispensing of liquid seasoning.

[0100] The liquid seasoning module 200 can be installed on the main body of the equipment through a detachable connection scheme, such as by using at least one of the following: bolt structure, snap-fit ​​structure, magnetic structure, and tenon and mortise structure.

[0101] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0102] In the description of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions 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 one or more embodiments or examples.

[0103] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pump head structure (100), characterized in that, include: Pump body (110), the pump body (110) is provided with liquid inlet (111) and liquid outlet (112). Pump housing (120), the pump body (110) is disposed inside the pump housing (120), and the pump housing (120) has an inlet port (121) on the side wall opposite to the inlet port (111). The first pipeline (130) connects the liquid inlet (111) and the liquid inlet port (121). The liquid inlet (111) and the liquid inlet port (121) are arranged alternately, and the first pipeline (130) is provided with a bending structure (131).

2. The pump head structure (100) according to claim 1, characterized in that, Also includes: Liquid inlet connector (132), the liquid inlet connector (132) is connected to the pump housing (120) and located at the liquid inlet interface (121), the first end of the liquid inlet connector (132) is located outside the pump housing (120) and configured to communicate with the storage tank (210), and the second end of the liquid inlet connector (132) is connected to the first pipeline (130); The liquid inlet port (121) is located in the middle of the side wall of the pump housing (120).

3. The pump head structure (100) according to claim 1, characterized in that, Also includes: The second pipeline (140) has the inlet (111) and outlet (112) located on the same side of the pump body (110). The pump casing (120) is also provided with an outlet connection interface (122). The second pipeline (140) connects the outlet (112) and the outlet connection interface (122). The liquid outlet port (122) and the liquid inlet port (121) are located on different side walls of the pump casing (120).

4. The pump head structure (100) according to claim 3, characterized in that, The inlet port (121) and the outlet port (122) are located on opposite side walls of the pump housing (120), and the second pipeline (140) is configured as a flexible component.

5. The pump head structure (100) according to claim 3, characterized in that, Also includes: The liquid outlet connector (141) is connected to the pump housing (120) and located at the liquid outlet interface (122). The first end of the liquid outlet connector (141) is connected to the second pipeline (140), and the second end of the liquid outlet connector (141) is located outside the pump housing (120). At least one first seal (142) is disposed between the liquid outlet connector (141) and the pump housing (120), the first seal (142) being configured to seal the gap between the liquid outlet connector (141) and the liquid outlet interface (122).

6. The pump head structure (100) according to claim 1, characterized in that, Also includes: A heating assembly (150) is disposed inside the pump housing (120) and outside the pump body (110), the heating assembly (150) being configured to heat the fluid flowing through the pump body (110); An electrical connection wire (151) is provided, which passes through the pump housing (120) and connects to the heating assembly (150).

7. The pump head structure (100) according to claim 3, characterized in that, Also includes: The pump shaft (170), eccentric wheel (171), and first bearing (172) are provided. The annular diaphragm (160) is installed inside the pump body (110). The two ends of the annular diaphragm (160) are connected to the pump body (110). The annular diaphragm (160) and the pump body (110) enclose a sealed space. The sealed space is connected to the inlet (111) and the outlet (112). An eccentric wheel (171) located inside the annular diaphragm (160) is installed on the pump shaft (170). The first bearing (172) is sleeved on the outside of the eccentric wheel (171). The pump shaft (170) drives the eccentric wheel (171) to rotate, and the first bearing (172) periodically acts on the annular diaphragm (160) to change the volume of the sealed space.

8. The pump head structure (100) according to claim 7, characterized in that, Also includes: The second seal (180) is located at the end of the annular diaphragm (160) and is connected to the pump body (110) and the annular diaphragm (160) to seal the enclosed space. The second seal (180) has a guide slope (181) on its periphery that contacts the annular diaphragm (160). The guide slope (181) is inclined from the outside to the inside of the annular diaphragm (160) toward the pump shaft (170). The second seal (180) is an elastic member and is configured to deform under external force to provide a force to the annular diaphragm (160) toward the pump body (110).

9. The pump head structure (100) according to claim 8, characterized in that, The pump body (110) is configured as a barrel-shaped structure with openings at both ends, and the second seal (180) is at least partially exposed in the openings; The opening includes a first opening, the pump body (110) is connected to the pump housing (120) to seal the first opening, and is further configured to deform a second seal (180) exposed in the first opening; and / or The opening includes a second opening (113), and the pump head structure (100) further includes a gland (190) located inside the pump housing (120), the gland (190) being connected to the pump body (110) to seal the second opening (113), and also configured to deform the second seal (180) exposed in the second opening (113); The pump head structure (100) further includes a second bearing (173), which is disposed at at least one end of the pump shaft (170).

10. The pump head structure (100) according to claim 7, characterized in that, The pump housing (120) includes a detachably connected base (123) and a cover (124). The pump body (110) is mounted on the base (123). The inlet (111) and the outlet (112) are located on the side of the pump body (110) facing the cover (124). The inlet interface (121) is located on the cover (124), and the outlet interface (122) is located on the base (123). The seat (123) has a through hole (1231) on the side away from the cover (124) that is opposite to the pump shaft (170). A boss (1232) is provided on the periphery of the through hole (1231), and a limiting structure (1233) matching the housing of the drive unit is provided on the boss (1232).

11. A liquid pump assembly, characterized in that, include: Pump head structure (100) as described in any one of claims 1 to 10; The liquid pump assembly also includes a drive unit, which is separately disposed from the pump head structure (100) and is configured to be poweredly connected to the pump shaft (170) of the pump head structure (100).

12. A liquid seasoning module (200), characterized in that, include: The storage tank (210) and the liquid pump assembly as claimed in claim 11, wherein the inlet connector (132) of the pump head structure (100) is configured to communicate with the storage tank (210); The storage tank (210) is provided with a connecting joint (211), which is configured to communicate with the liquid inlet joint (132). The liquid inlet joint (132) is provided with a first mating part (134), and the connecting joint (211) and / or the storage tank (210) are provided with a second mating part. The first mating part (134) and the second mating part are connected or separated by magnetic attraction. The storage tank (210) is provided with a notch structure (212), and the connecting joint (211) is located in the notch structure (212). The shape of the notch structure (212) matches the shape of the pump head structure (100) to accommodate at least part of the pump head structure (100).

13. A cooking appliance, characterized in that, Includes: a main body of equipment and a liquid seasoning module (200) as described in claim 12, wherein the main body of equipment is provided with a liquid outlet, and the liquid outlet is configured to communicate with the liquid outlet connector (141) of the pump head structure (100).

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