Coffee maker

Abstract

The utility model relates to domestic appliance technical field provides a coffee machine, include: water supply tank, liquid level stabilizing module, brewing module, pipeline and heating assembly, water supply tank has water supply opening, liquid level stabilizing module includes balance water tank, float assembly and stop piece, balance water tank has water inlet, water outlet and exhaust port, water inlet and water supply opening intercommunication, float assembly and stop piece all are located in balance water tank, float assembly is used for moving in balance water tank under the buoyancy of water to open or close water inlet, stop piece sets up between water inlet and exhaust port for preventing water between water inlet and stop piece from spouting to exhaust port, pipeline intercommunication water outlet and brewing module, heating assembly sets up in the pipeline, the utility model not only has guaranteed the stability of coffee machine's water supply liquid level, can effectively prevent liquid level stabilizing module from appearing water overflow from exhaust port in use, has reduced the operation that user carries out cleaning to overflowed water.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a coffee machine. Background Technology

[0002] Currently, to ensure the stability of the water flow rate, coffee machines typically have a level stabilization module installed on the water supply side. Existing level stabilization modules mainly consist of a float inside the water tank. The float rotates under the buoyancy of the water to open or close the water inlet, thus ensuring the stability of the water level. However, in practical applications, it has been found that some water overflows from the water tank's vent during use, requiring users to clean up the overflowing water promptly, which is time-consuming and laborious. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the related art. To this end, this invention proposes a coffee machine that ensures the stability of the water supply level and effectively prevents water from overflowing from the vent during use, reducing the need for users to clean up spilled water.

[0004] The coffee machine according to a first aspect of the present invention includes:

[0005] Water supply tank, equipped with a water inlet;

[0006] A liquid level stabilization module includes a balance tank, a float assembly, and a stop. The balance tank has an inlet, an outlet, and an exhaust port. The inlet is connected to the water supply port. The float assembly and the stop are both located inside the balance tank. The float assembly moves within the balance tank under the buoyancy of the water to open or close the inlet. The stop is located between the inlet and the exhaust port to prevent water from splashing between the inlet and the stop into the exhaust port.

[0007] A brewing module and piping, the piping connecting the outlet and the brewing module, and

[0008] A heating element is disposed in the pipe.

[0009] According to one embodiment of the present invention, the float assembly is configured to rise and fall within the balance tank under the buoyancy of water; the water inlet and the stop are respectively located above the balance tank.

[0010] The coffee machine of this invention features a float assembly and a stop component based on a balance water tank. The float assembly can move within the inner cavity of the balance water tank under the buoyancy of the water, opening or closing the water inlet of the balance water tank. This maintains a dynamic balance between the drainage from the water outlet and the water intake from the water inlet, ensuring a stable water level within the balance water tank. Since the stop component is located between the water inlet and the vent of the balance water tank, it prevents water from splashing from between the water inlet and the stop component into the vent during the opening or closing of the water inlet by the float assembly. This design ensures the stability of the water supply level of the coffee machine and effectively prevents water from overflowing from the vent during use, reducing the need for users to clean up spilled water.

[0011] According to one embodiment of the present invention, the stop member is a rib, and the rib and the balance water tank form an integral structure.

[0012] According to one embodiment of the present invention, the float assembly includes:

[0013] The float body is located inside the balance tank and is able to float on the water surface;

[0014] A plug is provided on the float body, and the plug is used to connect with the water inlet to open or close the water inlet;

[0015] The stop member is used to abut against the float body to limit the insertion stroke of the plug relative to the inlet.

[0016] According to one embodiment of the present invention, the plug includes:

[0017] The connecting part is connected to the float body;

[0018] A sealing part is connected to the connecting part, and the sealing part is positioned facing the water inlet for insertion into the water inlet.

[0019] The diameter of the plug gradually decreases along the insertion direction of the plug toward the water inlet.

[0020] According to one embodiment of the present invention, the float body includes:

[0021] A first body and a second body, the second body being disposed on the side of the first body, the top wall of the second body being lower than the top wall of the first body, and the plug being disposed on the top wall of the first body.

[0022] When the plug closes the water inlet, the stop member abuts against the top wall of the second body.

[0023] According to one embodiment of the present invention, there is a water passage gap between the peripheral wall of the float body and the inner wall of the balance tank, and the width of the water passage gap is 0.1 to 0.3 mm.

[0024] According to one embodiment of the present invention, the peripheral wall of the float body and / or the inner wall of the balance tank are provided with a guide structure, the guide structure extending along the height direction of the balance tank to guide the float body to rise and fall within the balance tank.

[0025] According to one embodiment of the present invention, the bottom wall of the float body and / or the bottom wall inside the balance tank are provided with protrusions.

[0026] According to one embodiment of the present invention, the balancing water tank includes:

[0027] The tank has an open end at the bottom, the water inlet is located on the top wall of the tank, and the exhaust port is located on the side wall of the tank.

[0028] A cover is detachably disposed on the open end, and the water outlet is disposed on the cover.

[0029] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a cross-sectional structural diagram of the liquid level stabilization module provided in this embodiment of the present invention.

[0032] Figure 2 This is provided by the embodiment of the present utility model. Figure 1 AA sectional view.

[0033] Figure 3 This is a three-dimensional structural diagram of the liquid level stabilization module provided in this embodiment of the utility model.

[0034] Figure 4 This is a schematic diagram of the explosion structure of the balance water tank provided in this embodiment of the utility model.

[0035] Figure 5This is a three-dimensional structural diagram of the float assembly provided in this embodiment of the utility model.

[0036] Figure 6 This is a cross-sectional structural schematic diagram of the float assembly provided in this embodiment of the utility model.

[0037] Figure 7 This is a schematic diagram of the structure of the coffee machine provided in this embodiment of the utility model.

[0038] Figure label:

[0039] 1. Water supply tank;

[0040] 2. Liquid level stabilization module; 21. Balance tank; 2101. Inner cavity; 2111. Tank body; 2112. Cover; 211. Inlet; 212. Outlet; 213. Vent; 22. Float assembly; 221. Float body; 2211. First body; 2212. Second body; 222. Plug; 23. Stop; 201. Water passage gap; 202. Guide structure; 2021. First guide rib; 2022. Second guide rib; 203. Protrusion; 2011. Magnet; 2012. Magnetic induction element;

[0041] 3. Heating components; 4. Piping; 5. Brewing module; 6. Liquid receiving module; 7. Insulation module. Detailed Implementation

[0042] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0043] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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 the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0045] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] The following is combined with Figures 1-7 The coffee machine provided by the utility model embodiment will be described in detail through specific embodiments and application scenarios.

[0048] like Figure 1 and Figure 7 As shown, this utility model provides a coffee machine, comprising:

[0049] Water supply tank 1 has a water inlet;

[0050] The liquid level stabilization module 2 includes a balance tank 21, a float assembly 22, and a stop 23. The balance tank 21 has an inlet 211, an outlet 212, and an exhaust port 213. The inlet 211 is connected to the water supply port. The float assembly 22 and the stop 23 are both located inside the balance tank 21. The float assembly 22 is used to move within the balance tank 21 under the buoyancy of the water to open or close the inlet 211. The stop 23 is located between the inlet 211 and the exhaust port 213 to prevent water between the inlet 211 and the stop 23 from splashing into the exhaust port 213.

[0051] Brewing module 5 and pipe 4, pipe 4 connects outlet 212 and brewing module 5, and

[0052] Heating component 3 is installed in pipe 4.

[0053] Understandably, the inlet 211 of the balancing water tank 21 is configured to connect with the water inlet of the water supply tank 1, and the water level in the balancing water tank 21 is lower than the water level in the water supply tank 1, so that the water in the water supply tank 1 can automatically flow into the balancing water tank 21 under the action of gravity. The balancing water tank 21 can be located below the water supply tank 1.

[0054] After storing a certain volume of water in the inner cavity 2101 of the balance tank 21, the float assembly 22 can float on the water surface under the buoyancy of the water. At least part of the material of the float assembly 22 can be a material with a density lower than that of water, or the float assembly 22 can have a cavity formed inside to ensure that the float assembly 22 can float on the water surface.

[0055] For the balancing water tank 21, the inlet 211 and the vent 213 can be respectively located on the top wall of the balancing water tank 21, and the outlet 212 can be located on the bottom wall or side wall of the balancing water tank 21; or, the inlet 211 and the vent 213 can be respectively located on the side wall of the balancing water tank 21, and the outlet 212 can be located on the bottom wall or side wall of the balancing water tank 21; or, one of the inlet 211 and the vent 213 can be located on the top wall of the balancing water tank 21, the other of the inlet 211 and the vent 213 can be located on the side wall of the balancing water tank 21, and the outlet 212 can be located on the bottom wall or side wall of the balancing water tank 21, without any specific limitation.

[0056] The float assembly 22 can be configured to be rotatably connected to the balance tank 21. The float assembly 22 can rotate relative to the balance tank 21 under the buoyancy of the water to open or close the water inlet 211. Of course, the float assembly 22 can also be configured to rise and fall within the inner cavity 2101 under the buoyancy of the water to open or close the water inlet 211, and there is no specific limitation on this.

[0057] The stop member 23 can be detachably installed in the inner cavity 2101 or it can be integrated with the inner wall of the inner cavity 2101. No specific limitation is made in this regard.

[0058] In practical applications, when water from the water supply tank 1 enters the inner cavity 2101 through the inlet 211, the water level in the balance tank 21 rises. The float assembly 22 rises in the inner cavity 2101 under the buoyancy of the water until it contacts the inlet 211, thus closing the inlet 211. As water in the balance tank 21 is gradually discharged through the outlet 212, the water level in the balance tank 21 drops, and the float assembly 22 falls with the drop in water level until it separates from the inlet 211, thus opening the inlet 211. At this time, water from the water supply tank 1 is replenished into the inner cavity 2101 through the inlet 211, causing the water level in the balance tank 21 to rise and drive the float assembly 22 to close the inlet 211 again. This process repeats, ensuring that the water level in the balance tank 21 remains stable, thereby ensuring the stability of the water flow rate at the outlet 212.

[0059] Because the water level in the balance tank 21 fluctuates significantly during the opening or closing of the inlet 211 of the float assembly 22, especially in the area where the inlet 211 is located, this embodiment uses a stop 23 to divide the inner cavity 2101 into a first region and a second region. The first region is formed between the inlet 211 and the stop 23, and the second region is formed between the stop 23 and the vent 213. This limits the water level fluctuations and water droplet splashes caused by the water level fluctuations during the opening or closing of the inlet 211 of the float assembly 22 to the first region, ensuring that no significant water level fluctuations occur in the second region. This allows the balance tank 21 to perform normal venting through the vent 213 without water droplets overflowing from the vent 213.

[0060] For the heating element 3, the heating element 3 can be an electric heating wire, which is wound around the circumferential wall of the pipe 4. The diameter of the outlet 212 and the inner diameter of the pipe 4 can be 8 to 12 mm.

[0061] like Figure 7 As shown, for a coffee machine, the coffee machine includes a brewing module 5, a liquid receiving module 6, and a heat preservation module 7 arranged from top to bottom; the brewing module 5 includes a spray nozzle and a powder container, and the outlet 212 of the balance water tank 21 is connected to the spray nozzle through a pipe 4, and the spray nozzle is located on the upper side of the powder container.

[0062] In practical applications, the water in the liquid level stabilization module 2 is output from the outlet 212 and heated to a high temperature of 92-95°C by the heating component 3. The high temperature water flows into the powder container through the shower head and mixes with the coffee powder in the powder container. The brewed coffee then flows into the receiving module 6, such as into a coffee cup. A heat preservation module 7, such as a heating plate, is installed below the receiving module 6 to maintain the temperature of the coffee in the receiving module 6 and ensure the quality of the coffee.

[0063] The coffee machine shown in this utility model, by setting a float assembly 22 and a stop 23 based on the balance water tank 21, allows the float assembly 22 to move within the inner cavity 2101 of the balance water tank 21 under the buoyancy of the water, thereby opening or closing the water inlet 211 of the balance water tank 21. This maintains the dynamic balance between the drainage of the water outlet 212 and the water intake of the water inlet 211 of the balance water tank 21, ensuring the stability of the water level in the balance water tank 21. Since the stop 23 is set between the water inlet 211 and the vent 213 of the balance water tank 21, it can prevent water between the water inlet 211 and the stop 23 from splashing into the vent 213 during the process of the float assembly 22 opening or closing the water inlet 211.

[0064] Therefore, this utility model not only ensures the stability of the water supply level of the coffee machine, but also effectively prevents water from overflowing from the exhaust port 213 during use, reducing the user's need to clean up the overflowing water.

[0065] In some embodiments, such as Figure 1 and Figure 4 As shown, the float assembly 22 is configured to rise and fall within the balance tank 21 under the buoyancy of water; the inlet 211 and the stop 23 are respectively located above the balance tank 21.

[0066] For example, the inlet 211 and the stop 23 are respectively provided on the top wall of the balance water tank 21, and the vent 213 is provided on the side wall of the balance water tank 21; or the inlet 211, the stop 23 and the vent 213 can all be provided on the top wall of the balance water tank 21.

[0067] In practical applications, the height of the vent 213 should be higher than the actual water level that the liquid level stabilization module 2 needs to maintain. Since the actual water level that the liquid level stabilization module 2 needs to maintain is usually located in the middle area of ​​the balance tank 21, the vent 213 can be set near the top wall of the balance tank 21.

[0068] The float assembly 22 is configured to rise and fall within the inner cavity 2101 of the balance tank 21 under the buoyancy of water. At this time, the inlet 211 and the stop 23 are respectively located above the balance tank 21. This design facilitates the use of the top structure of the float assembly 22 to cooperate with the inlet 211 to open or close the inlet 211. During the opening or closing of the inlet 211, the stop 23 directly stops the water on the side of the inlet 211 to block the water jet path between the inlet 211 and the vent 213, thereby preventing water from splashing between the inlet 211 and the stop 23 into the vent 213.

[0069] For example, the stop 23 may be configured as an annular shape and extended circumferentially along the inlet 211.

[0070] For example, the stop 23 may be configured as a plate and is configured to extend downward from the top wall of the balance tank 21, for example, the stop 23 extends downward to the lower side of the set height of the vent 213, so as to block the water jet path between the inlet 211 and the vent 213.

[0071] In some embodiments, such as Figure 1 and Figure 4 As shown, in order to reduce the number of stops 23, the stops 23 can be set as ribs, and the ribs and the balance tank 21 form an integral structure.

[0072] In practical applications, the ribs and the balance tank 21 can be integrated injection molded parts. The ribs can be spaced apart on the side of the water inlet 211 facing the exhaust port 213. The ribs are configured as strips and are set to extend vertically downward from the top wall of the balance tank 21. The bottom edge of the ribs is at a height lower than the exhaust port 213.

[0073] In some embodiments, such as Figure 1 , Figure 5 and Figure 6 As shown, the float assembly 22 includes: a float body 221 and a plug 222;

[0074] The float body 221 is located inside the balance tank 21 and is configured to float on the water surface. The plug 222 is located on the top wall of the float body 221 and is used to insert into the water inlet 211 to open or close the water inlet 211. The stop member 23 is used to abut against the float body 221 to limit the insertion stroke of the plug 222 relative to the water inlet 211.

[0075] It is understandable that the equivalent density of the float body 221 is less than the density of water, thereby ensuring that the float body 221 can float on the water surface and rise and fall with the water level in the balance tank 21.

[0076] For example, the float body 221 can be a foam float.

[0077] For example, the float body 221 is a plastic body or a metal body, and a cavity is constructed inside the float body 221 to ensure that the float body 221 can float on the water surface.

[0078] Furthermore, since the inlet 211 is located on the top wall of the balance tank 21, and the float body 221 is configured to rise and fall within the inner cavity 2101 under the buoyancy of the water, the plug 222 is located on the top wall of the float body 221. This facilitates the float body 221 to drive the plug 222 into the inlet 211 to close the water inlet during its ascent, or the float body 221 to drive the plug 222 out of the inlet 211 during its descent to open the inlet 211. When the plug 222 closes the inlet 211, the peripheral wall of the plug 222 is sealed to the inner wall of the inlet 211.

[0079] In some embodiments, the plug 222 is selected as an elastic plug, such as a silicone plug or a rubber plug. This design can ensure that the peripheral wall of the plug 222 and the inner wall of the inlet 211 are interference-fitted when the plug 222 closes the inlet 211, thereby ensuring the sealing effect between the plug 222 and the inlet 211.

[0080] Furthermore, such as Figure 1 As shown, when the plug 222 closes the inlet 211, the stop 23 abuts against the top of the float body 221. This design uses the stop 23 to limit the height of the float body 221, thereby limiting the depth of the plug 222 inserted into the inlet 211, and preventing the plug 222 from being difficult to detach from the inlet 211 when the water level drops.

[0081] In some embodiments, such as Figure 1 , Figure 5 and Figure 6 As shown, the float body 221 includes: a first body 2211 and a second body 2212. Both the first body 2211 and the second body 2212 are provided with cavities and are connected. The second body 2212 is located on the side of the first body 2211. The height of the top wall of the second body 2212 is lower than the height of the top wall of the first body 2211. The plug 222 is located on the top wall of the first body 2211. When the plug 222 closes the water inlet 211, the stop member 23 abuts against the top wall of the second body 2212.

[0082] It is understandable that by configuring the float body 221 as a first body 2211 and a second body 2212, the arrangement of the first body 2211 and the second body 2212 can ensure that the float body 221 can only rise and fall within the balance tank 21 under the buoyancy of the water, and will not rotate within the balance tank 21. This ensures that the attitude of the float body 221 remains unchanged during the rising and falling process, which is beneficial to ensure that the float body 221 drives the plug 222 to reliably open or close the inlet 211 during the rising and falling process.

[0083] Meanwhile, since the height of the top wall of the second body 2212 is lower than the height of the top wall of the first body 2211, when the plug 222 closes the water inlet 211, the top of the first body 2211 is inserted between the stop member 23 and the inner wall of the balance water tank 21 on the side away from the exhaust port 213, which enhances the isolation effect of the stop member 23 between the water inlet 211 and the exhaust port 213. This design also helps to prevent water from splashing from the area where the water inlet 211 is located into the exhaust port 213.

[0084] In some embodiments, such as Figure 1 , Figure 4 and Figure 6 As shown, the plug 222 is configured to be inserted into or detached from the inlet 211 along the height direction of the balance tank 21; wherein, along the height direction of the balance tank 21, the diameter of the inlet 211 gradually increases from top to bottom, for example, the inlet 211 includes a connecting section facing the bottom wall of the balance tank 21, the diameter of the connecting section gradually increasing from top to bottom, and the diameter of the plug 222 gradually increasing from top to bottom. The connecting section is used to mate with the top of the plug 222.

[0085] In some embodiments, the plug 222 includes a connecting part and a sealing part, the connecting part being connected to the float body 221; the sealing part and the connecting part are connected, the sealing part being disposed toward the water inlet 211 and used for insertion into the water inlet 211; wherein, along the insertion direction of the plug 222 toward the water inlet 211, the diameter of the sealing part gradually decreases.

[0086] Understandably, the sealing part is located above the connecting part and is connected to the connecting part. The connecting part is connected to the top wall of the first body 2211. The diameter of the sealing part gradually increases from top to bottom and is configured to control the opening or closing of the water inlet 211. To facilitate the insertion of the sealing part into the water inlet 211, the diameter of the end of the sealing part near the connecting part can be larger than the diameter of the water inlet 211, and the diameter of the end of the sealing part away from the connecting part can be smaller than the diameter of the water inlet 211.

[0087] By defining the shape of the plug 222 and the matching inlet 211, the sealing effect between the plug 222 and the inlet 211 can be ensured when the plug 222 is inserted into the inlet 211, and the plug 222 can be easily removed from the inlet 211 when the water level in the balance tank 21 drops.

[0088] In some embodiments, such as Figure 1 and Figure 2 As shown, a water passage gap 201 is provided between the peripheral wall of the float body 221 and the inner wall of the balance water tank 21.

[0089] It is understandable that by setting the water gap 201, it can be ensured that the water input from the inlet 211 can flow through the water gap 201 to the inner cavity 2101 on the lower side of the float body 221 during the raising and lowering of the float body 221, so that the float body 221 can accurately sense the water level change in the inner cavity 2101 and raise and lower accordingly.

[0090] The width of the water passage gap 201 is 0.1 to 0.3 mm, for example, the width of the water passage gap 201 is 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm and other suitable widths.

[0091] In some embodiments, such as Figure 1 and Figure 2 As shown, the peripheral wall of the float body 221 and / or the inner wall of the balance tank 21 are provided with a guide structure 202. The guide structure 202 extends along the height direction of the balance tank 21 to guide the float body 221 to rise and fall in the corresponding inner cavity 2101 of the balance tank 21.

[0092] For example, the guide structure 202 includes a plurality of first guide ribs 2021. The plurality of first guide ribs 2021 are all disposed on the side wall of the inner cavity 2101 corresponding to the balance water tank 21, and are arranged sequentially at intervals along the circumference of the inner cavity 2101. Each first guide rib 2021 extends along the height direction of the balance water tank 21, and a water passage gap 201 is formed between two adjacent first guide ribs 2021.

[0093] For example, the guide structure 202 includes a plurality of second guide ribs 2022, which are all disposed on the peripheral wall of the float body 221 and are arranged sequentially at intervals along the circumference of the float body 221. Each second guide rib 2022 extends along the height direction of the balance tank 21, and a water passage gap 201 is formed between two adjacent second guide ribs 2022.

[0094] In some embodiments, such as Figure 1 and Figure 6As shown, the bottom wall of the float body 221 and / or the bottom wall inside the balance tank 21 are provided with protrusions 203.

[0095] It is understood that the protrusions 203 can be dot-shaped or strip-shaped. The bottom wall of the float body 221 and / or the bottom wall of the inner cavity 2101 corresponding to the balance water tank 21 are provided with multiple protrusions 203, which are distributed at intervals.

[0096] By setting the protrusion 203, when the float body 221 falls onto the bottom wall of the inner cavity 2101, it can prevent the bottom wall of the float body 221 from being attracted together by the negative pressure, which would affect the upward movement of the float body 221 when water is added to the balance tank 21.

[0097] in, Figure 1 The illustration specifically shows a case where the bottom wall of the float body 221 has a protrusion 203, while the bottom wall of the inner cavity 2101 does not have a protrusion. Of course, it is also possible to design the bottom wall of the float body 221 to have no protrusion, while the bottom wall of the inner cavity 2101 has a protrusion; there is no specific limitation on this.

[0098] In some embodiments, such as Figure 3 and Figure 4 As shown, the balance water tank 21 includes: a tank body 2111 and a cover 2112;

[0099] The bottom of the tank 2111 has an open end, the water inlet 211 is located on the top wall of the tank 2111, and the exhaust port 213 is located on the side wall of the tank 2111; the cover 2112 is detachably located on the open end, and the water outlet 212 is located on the cover 2112.

[0100] The box body 2111 has a stop at its open end, and an external thread is provided on the peripheral wall of the stop. The peripheral wall of the stop also has a groove for embedding a sealing ring. The cover 2112 has a cover edge, and the inner wall of the cover edge has an internal thread. Based on the threaded engagement between the internal thread and the external thread, the cover 2112 can be installed on the open end of the box body 2111, and a waterproof seal between the cover 2112 and the open end is ensured.

[0101] In some embodiments, such as Figure 1 and Figure 6 As shown, the liquid level stabilization module 2 also includes a water shortage detection component, which includes a magnet 2011 and a magnetic induction element 2012. The magnet 2011 is located on the float assembly 22, and the magnetic induction element 2012 is located on the balance water tank 21. The magnet 2011 is used to trigger the magnetic induction element 2012 to generate an induction signal.

[0102] It is understood that the magnet 2011 can be a permanent magnet, and the magnet 2011 can be set at the bottom of the float body 221, while the magnetic induction element 2012 is set at the bottom of the balance water tank 21.

[0103] For example, the magnetic induction element 2012 can be a reed switch, which can be disposed at the bottom of the balance tank 21. The reed switch includes at least one pair of reeds. For example, when the magnet 2011 approaches the reed switch, the pair of reeds corresponding to the reed switch closes to form a conducting circuit. That is, the reed switch can generate a switching signal that turns on or off when triggered by the magnet 2011.

[0104] For example, the magnetic induction element 2012 can be a coil wound around the peripheral wall of the balance tank 21. When the magnet 2011 rises and falls with the float assembly 22, the position of the magnet 2011 relative to the coil changes. The change in the position of the magnet 2011 causes a change in the magnetic field strength of the coil, which in turn causes the coil to generate a current / voltage signal.

[0105] In practical applications, as the float assembly 22 rises and falls within the balance tank 21 under the buoyancy of the water, the position of the magnet 2011 relative to the magnetic induction element 2012 also changes when the water level in the balance tank 21 changes. When the height of the magnet 2011 relative to the magnetic induction element 2012 is greater than a preset value, the magnetic induction element 2012 will not generate an induction signal. However, when the height of the magnet 2011 relative to the magnetic induction element 2012 is less than or equal to the preset value, the magnetic induction element 2012 will generate an induction signal. Therefore, the height of the float assembly 22 in the balance tank 21 can be determined based on whether the magnetic induction element 2012 generates an induction signal, thereby determining whether the balance tank 21 is short of water. This solution does not damage the overall appearance of the balance tank 21 and has high reliability, as it is not affected by vibration or drops, thus improving the accuracy and reliability of the water shortage detection results.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A coffee machine, characterized in that, include: Water supply tank (1) has a water inlet; The liquid level stabilization module (2) includes a balance tank (21), a float assembly (22), and a stop (23). The balance tank (21) has an inlet (211), an outlet (212), and an exhaust port (213). The inlet (211) is connected to the water supply port. The float assembly (22) and the stop (23) are both located inside the balance tank (21). The float assembly (22) is used to move within the balance tank (21) under the buoyancy of the water to open or close the inlet (211). The stop (23) is located between the inlet (211) and the exhaust port (213) to prevent water between the inlet (211) and the stop (23) from splashing into the exhaust port (213). The brewing module (5) and the pipe (4), the pipe (4) connecting the outlet (212) and the brewing module (5), and Heating component (3) is disposed in the pipe (4).

2. The coffee machine according to claim 1, characterized in that, The float assembly (22) is configured to rise and fall within the balance tank (21) under the buoyancy of water; the inlet (211) and the stop (23) are respectively located above the balance tank (21).

3. The coffee machine according to claim 2, characterized in that, The stop (23) is a rib, and the rib and the balance water tank (21) form an integral structure.

4. The coffee machine according to claim 2, characterized in that, The float assembly (22) includes: The float body (221) is located inside the balance tank (21) and can float on the water surface; A plug (222) is provided on the float body (221). The plug (222) is used to be inserted into the water inlet (211) to open or close the water inlet (211). The stop (23) is used to abut against the float body (221) to limit the insertion stroke of the plug (222) relative to the inlet (211).

5. The coffee machine according to claim 4, characterized in that, The plug (222) includes: A connecting part is provided, which is connected to the float body (221); A sealing part is connected to the connecting part, and the sealing part is arranged facing the water inlet (211) for insertion into the water inlet (211); The diameter of the plug gradually decreases along the insertion direction of the plug (222) toward the inlet (211).

6. The coffee machine according to claim 4, characterized in that, The float body (221) includes: A first body (2211) and a second body (2212), the second body (2212) being disposed on the side of the first body (2211), the height of the top wall of the second body (2212) being lower than the height of the top wall of the first body (2211), and the plug (222) being disposed on the top wall of the first body (2211); When the plug (222) closes the inlet (211), the stop (23) abuts against the top wall of the second body (2212).

7. The coffee machine according to claim 4, characterized in that, There is a water passage gap (201) between the peripheral wall of the float body (221) and the inner wall of the balance tank (21), and the width of the water passage gap (201) is 0.1 to 0.3 mm.

8. The coffee machine according to claim 7, characterized in that, The circumferential wall of the float body (221) and / or the inner wall of the balance tank (21) are provided with a guide structure (202), which extends along the height direction of the balance tank (21) to guide the float body (221) to rise and fall within the balance tank (21).

9. The coffee machine according to claim 4, characterized in that, The bottom wall of the float body (221) and / or the bottom wall inside the balance tank (21) are provided with protrusions (203).

10. The coffee machine according to any one of claims 1 to 9, characterized in that, The balance tank (21) includes: The box body (2111) has an open end at the bottom, the water inlet (211) is located on the top wall of the box body (2111), and the exhaust port (213) is located on the side wall of the box body (2111). A cover (2112) is detachably provided at the open end, and a water outlet (212) is provided at the cover (2112).

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