Coffee machine

Abstract

The utility model relates to the technical field of coffee machines, and provides a coffee machine which comprises a water tank, a liquid level balancing device, a coil assembly and a heating device, and the water tank is provided with a water storage cavity and a first water outlet communicated with the water storage cavity; the liquid level balancing device comprises a mounting shell and a floater module, the mounting shell is connected with the water tank, a containing cavity is formed in the mounting shell, the containing cavity is communicated with the first water outlet, the floater module is movably arranged in the containing cavity, the floater module can be close to or away from the first water outlet along with rising and falling of the water level, and the floater module is provided with a magnetic part; the coil assembly is provided with a coil, the coil is wound on the outer wall of the mounting shell, the coil is connected with the control circuit, and the coil is used for sensing position changes of the magnetic part; the heating device is connected with the liquid level balancing device so as to heat water discharged by the liquid level balancing device. Whether water exists in the water tank or not is judged according to cooperation of the magnetic part of the floater module and the coil assembly, so that power supply and power failure of the heating device can be controlled according to conditions, and dry burning is avoided.

Description

Technical Field

[0001] This utility model relates to the field of coffee machine technology, and more particularly to coffee machines. Background Technology

[0002] Current coffee machines generally use U-shaped or horseshoe-shaped tubes to heat water. In the early stages of the boiling process, the water level is high, the pressure is high, the flow rate is high, and the temperature is low. In the later stages, the water level is low, the flow rate is slow, and the temperature is higher. Related technologies typically use capacitive water level sensors to detect the water level in the tank. However, these sensors are easily affected by water droplets adhering to the walls, moisture, or installation gaps, leading to misjudgments and potentially causing the heating element to burn dry without water. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in related technologies. To this end, this invention proposes a coffee machine designed to improve the stability of water level detection in the water tank.

[0004] The coffee machine according to an embodiment of the present utility model includes:

[0005] A water tank, wherein the water tank is provided with a water storage chamber and a first water outlet connected to the water storage chamber;

[0006] A liquid level balancing device includes a mounting shell and a float module. The mounting shell is connected to the water tank and has a receiving cavity inside. The receiving cavity is connected to the first water outlet. The float module is movably disposed in the receiving cavity and can move closer to or further away from the first water outlet as the water level rises or falls. The float module is equipped with a magnetic component.

[0007] A coil assembly, wherein the coil assembly is provided with a coil wound around the outer wall of the mounting housing, the coil is connected to a control circuit, and the coil is used to sense the position change of the magnetic component;

[0008] A heating device, which is connected to a liquid level balancing device, is used to heat the water discharged by the liquid level balancing device.

[0009] According to an embodiment of this utility model, the coffee machine stores water through a water tank. The first outlet of the water tank is used to drain the water in the storage chamber into the mounting shell of the liquid level balancing device. When there is water in the storage chamber, the water flows through the first outlet into the receiving cavity of the mounting shell until the receiving cavity is full. At this time, the float module floats under the action of buoyancy and blocks the first outlet. When there is no water in the storage chamber, as the water level in the receiving cavity drops, the float module opens the first outlet. At the same time, the coil assembly is connected to the outer wall of the mounting shell. When the water level in the receiving cavity drops, the float module gradually moves away from the first outlet. At this time, the magnetic component in the float module gradually moves closer to the coil. The coil is connected to the control circuit. In this way, the presence or absence of water in the tank can be fed back based on the difference in current or inductance when the relative positions of the magnetic component and the coil are different. This method is not affected by water vapor and will not cause misjudgment of the water level in the tank, resulting in more stable detection results. The water discharged from the containment chamber flows to the heating device for heating. Based on the cooperation between the magnetic component of the float module and the coil assembly, it can determine whether there is water in the water tank, and thus control the power supply and cut-off of the heating device as needed to avoid dry burning.

[0010] According to one embodiment of the present invention, when the magnetic component is located inside the coil, the heating device stops heating.

[0011] According to one embodiment of the present invention, the float module includes:

[0012] The main body is movably disposed in the receiving cavity and can move closer to or further away from the first outlet as the water level rises or falls;

[0013] A mounting rod is connected to the main body, and a magnetic component is connected to the mounting rod. The mounting rod, when the main body moves, causes the magnetic component to extend into or retract from the coil.

[0014] According to one embodiment of the present invention, the inner wall of the receiving cavity is provided with a sliding groove, and the float module moves along the extension direction of the sliding groove to approach or move away from the first water outlet.

[0015] According to one embodiment of the present invention, the mounting shell has a vent hole that connects the receiving cavity to the outside.

[0016] According to one embodiment of the present invention, the mounting rod has a fixing cavity, and the magnetic component is accommodated and confined within the fixing cavity.

[0017] According to one embodiment of the present invention, the body includes:

[0018] A float is movably disposed within the receiving cavity, and one end of the mounting rod is connected to the bottom of the float.

[0019] A plug is attached to the top of the float and is used to block or open the first outlet.

[0020] According to one embodiment of the present invention, the end of the plug away from the float is provided with a blocking platform, and the diameter of the blocking platform gradually decreases in the direction away from the float.

[0021] According to one embodiment of the present invention, the coil assembly includes a protective shell, a connecting pipe section is formed at the bottom of the mounting shell, the connecting pipe section is used to connect the heating device, the protective shell is sleeved outside the connecting pipe section, the protective shell and the connecting pipe section enclose a receiving cavity, and the coil is accommodated in the receiving cavity.

[0022] According to one embodiment of the present invention, the receiving cavity is divided into a water supply cavity and an installation cavity, and the water supply cavity and the installation cavity are connected. The installation cavity is correspondingly connected to the first water outlet, and the float module is movably disposed in the installation cavity.

[0023] According to one embodiment of the present invention, a control valve is provided between the connecting pipe section and the heating device, and the control valve is a one-way valve.

[0024] 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

[0025] 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.

[0026] Figure 1 This is a schematic diagram of the structure of the coffee machine provided in this embodiment of the utility model;

[0027] Figure 2 This is a longitudinal sectional view of the float module in the coffee machine provided in this embodiment of the present invention in the second state;

[0028] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0029] Figure 4 This is a longitudinal sectional view of the float module in the coffee machine provided in this embodiment of the present invention in its first state;

[0030] Figure 5 yes Figure 4 A magnified view of a section at point B.

[0031] Figure label:

[0032] 1. Water tank; 11. Water storage chamber; 12. First water outlet; 2. Liquid level balancing device; 21. Mounting shell; 211. Receiving chamber; 2111. Mounting chamber; 2112. Water supply chamber; 212. Connecting pipe section; 22. Float module; 221. Body; 2211. Float; 2212. Plug; 222. Mounting rod; 2221. Fixing chamber; 223. Magnetic component; 3. Coil assembly; 31. Coil; 32. Protective shell; 33. Storage chamber; 4. Heating device; 5. Heating module; 6. Brewing module; 7. Liquid receiving module; 8. Heat preservation module; 9. Control valve. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] The current market standard for coffee brewing is that the water temperature in contact with the coffee should be between 92℃ and 95℃ for at least 90% of the contact time. However, existing coffee machines use U-shaped tubes or horseshoe tubes to heat the water. In the early stages of the water boiling process, the water level is high, the pressure is high, the flow rate is high, and the temperature is low. In the later stages of the water boiling process, the water level is low, the flow rate is slow, and the temperature is high. As a result, the water temperature after heating does not meet the requirements of high-temperature coffee machines.

[0039] Meanwhile, for ordinary drip coffee machines, the heating element 4 uses an automatic reset thermostat to determine when there is no water and shut off the power. This has a relatively long delay, and insufficient water in the heating element 4 will produce a large amount of steam. During the heat preservation phase, the automatic reset thermostat will frequently activate. Furthermore, if residual water blocks the pipes, the air in the pipes cannot be expelled during the next water addition, resulting in a situation where two sections of water are sandwiched between sections of air. This will cause bubbles to appear during the initial heating stage, thus affecting the water temperature and subsequent coffee extraction.

[0040] In response to the above issues, the following is based on Figures 1 to 5 This application describes the coffee machine.

[0041] The coffee machine according to an embodiment of the present invention includes a water tank 1, a liquid level balancing device 2, a coil assembly 3, and a heating device 4. The water tank 1 is provided with a water storage chamber 11 and a first water outlet 12 communicating with the water storage chamber 11. The liquid level balancing device 2 includes a mounting shell 21 and a float module 22. The mounting shell 21 is connected to the water tank 1 and has a receiving cavity 211 inside. The receiving cavity 211 is communicating with the first water outlet 12. The float module 22 is movably disposed in the receiving cavity 211 and can move closer to or further away from the first water outlet 12 as the water level rises or falls. The float module 22 is provided with a magnetic element 223. The coil assembly 3 is provided with a coil 31, which is wound around the outer wall of the mounting shell 21. The coil 31 is connected to a control circuit and is used to sense the position change of the magnetic element 223. The heating device 4 is connected to the liquid level balancing device 2 to heat the water discharged by the liquid level balancing device 2. It should be noted that the mounting housing 21 includes a water outlet pipe that is subsequently connected to the heating device 4, and the coil 31 can also be wound around the water outlet pipe, as long as the position change of the magnetic component 223 can be sensed by the coil 31, which is not limited here.

[0042] According to an embodiment of the present invention, the coffee machine stores water through a water tank 1. The first outlet 12 of the water tank 1 is used to drain water from the water storage chamber 11 into the mounting shell 21 of the liquid level balancing device 2. When there is water in the water storage chamber 11, the water in the water storage chamber 11 flows through the first outlet 12 into the receiving cavity 211 of the mounting shell 21 until the receiving cavity 211 is full. At this time, the float module 22 floats up under the action of buoyancy and blocks the first outlet 12. When there is no water in the water storage chamber 11, as the water level in the receiving cavity 211 drops, the float module 22 opens the first outlet 12. Meanwhile, the coil assembly 3 is connected to the outer wall of the mounting shell 21. When the water level in the receiving cavity 211 drops, the float module 22 gradually moves away from the first outlet 12. At this time, the magnetic component 223 in the float module 22 moves closer to the coil, and the coil 31 is connected to the control circuit. Thus, the presence or absence of water in the water tank 1 can be fed back based on the difference in current or inductance when the relative positions of the magnetic component 223 and the coil 31 are different. This prevents misjudgment of the water level in the water tank 1 due to water vapor, resulting in more stable detection results. The water discharged from the receiving cavity 211 flows to the heating device 4 for heating. Based on the cooperation between the magnetic component 223 of the float module 22 and the coil assembly 3, the presence or absence of water in the water tank 1 can be determined, thereby allowing for control of the power supply and disconnection of the heating device 4 to prevent dry burning.

[0043] In one embodiment, the inner wall of the receiving cavity 211 is provided with a sliding groove, and the float module 22 moves along the extending direction of the sliding groove to approach or move away from the first outlet 12. In this way, the displacement of the float module 22 is restricted by the sliding groove to ensure that the float module 22 floats smoothly, which can effectively improve the detection accuracy.

[0044] In one embodiment, when the magnetic component 223 is located inside the coil 31, the heating device 4 stops heating to improve detection accuracy. Exemplarily, the magnetic component 223 is a magnet. It should be noted that "magnetic component 223 inside the coil 31" means that the magnetic component 223 extends into the hollow area enclosed by the coil 31, while "magnetic component 223 outside the coil 31" means that the magnetic component 223 exits the hollow area enclosed by the coil 31. When the magnetic component 223 is inside the coil 31, it can be that part of the magnetic component 223 enters the coil 31, or it can be that the magnetic component 223 completely enters the coil 31; this is not limited here. The magnetic field generated by the magnetic component 223 extending into the coil 31 will affect the current or inductance of the coil 31. Therefore, the control circuit can determine whether the magnetic component 223 extends into the coil 31, thereby determining the buoyancy of the float module 22, and further determining whether there is water in the water tank 1. For example, if the magnetic component 223 extends into the coil 31, it can be determined that there is no water in the water tank 1; if the magnetic component 223 is located outside the coil 31, it can be determined that there is water in the water tank 1.

[0045] like Figure 3 As shown, it can be understood that the first outlet 12 of the water tank 1 can be located at the bottom of the water tank 1 so that the water in the water storage chamber 11 can flow naturally to the first outlet 12 for discharge. Thus, the liquid level balancing device 2, the coil assembly 3, and the heating device 4 can form a heating module 5 located at the bottom of the water tank 1. Optionally, the liquid level balancing device 2 is located at the first outlet 12. For example, the upper part of the mounting shell 21 is the water inlet, which connects the first outlet 12 and the receiving chamber 211, so that the receiving chamber 211 of the mounting shell 21 can receive the water flowing out of the first outlet 12. The float module 22 can float up and down in the receiving cavity 211, moving closer to or away from the first outlet 12 as the water level rises and falls. That is, when there is water in the water storage cavity 11, the receiving cavity 211 will also be filled with water. When there is no water in the water storage cavity 11, the water in the receiving cavity 211 flows to the heating device 4, causing the water level in the receiving cavity 211 to drop, and the float module 22 will drop as the water level drops.

[0046] In one embodiment, the mounting shell 21 has a vent hole connecting the receiving cavity 211 to the outside, which connects the receiving cavity 211 to the outside atmosphere to achieve a communicating vessel effect. A sealing element, such as a rubber ring or silicone ring, is provided at the connection between the mounting shell 21 and the water tank 1 to prevent water leakage.

[0047] In one embodiment, determining whether there is water in the water tank 1 does not necessarily refer to whether the water in the water storage chamber 11 is emptied. One possibility is that the water in the water storage chamber 11 is just emptied, while the water level in the receiving chamber 211 just reaches the first outlet 12. In this case, the float module 22 is still blocked at the first outlet 12, and it can still be determined that there is water in the water tank 1. In this situation, the heating device 4 can continue to operate without power. Optionally, the amount of water required to fill the receiving chamber 211 can be equal to the amount of water heated by the heating device 4 once. Therefore, when the water level in the receiving chamber 211 reaches the first outlet 12, even if there is no water in the water storage chamber 11, the water supply from the receiving chamber 211 to the heating device 4 can still meet the required water volume. However, if the water level in the receiving chamber 211 cannot reach the first outlet 12, the water in the receiving chamber 211 is insufficient to allow the heating device 4 to complete a quantitative water heating operation, making it difficult to guarantee the subsequent coffee brewing effect. In this case, the heating device 4 can be powered off to prompt the user to add water to the water tank 1.

[0048] Thus, the water supply from the liquid level balancing device 2 to the heating device 4 can ensure that the liquid level of the heating device 4 is constant during heating, and can heat a certain amount of water to a relatively stable temperature range, such as reaching the standard of 92~96 degrees Celsius, thereby ensuring a good brewing temperature in the future.

[0049] like Figure 3 and Figure 5 As shown, according to one embodiment of the present invention, the float module 22 includes a body 221 and a mounting rod 222. The body 221 is movably disposed in the receiving cavity 211 and can move closer to or away from the first outlet 12 as the water level rises or falls. The mounting rod 222 is connected to the body 221, and the magnetic component 223 is connected to the mounting rod 222. The mounting rod 222 drives the magnetic component 223 to extend into or retract from the coil 31 under the movement of the body 221.

[0050] Understandably, the main body 221 can be designed as a module that is easy to float and sink, such as a plastic block or a hollow block of other materials. This is not limited, as long as it can float and sink according to water level changes. The mounting rod 222 can be connected to the bottom of the main body 221. The connection method can be adhesive, welding, plug-in, snap-fit, or threaded connection. This is not limited, as long as the mounting rod 222 floats and sinks with the main body 221. Since the main body 221 requires a large volume to ensure normal floating and sinking, its large volume makes it inconvenient to extend into the coil 31. Therefore, the volume of the mounting rod 222 is set smaller than the volume of the main body 221 to facilitate its extension into the coil 31. Simultaneously, the magnetic component 223 is located on the mounting rod 222, for example, at the end of the mounting rod 222 away from the main body 221, so that it extends into the coil 31 along with one end of the mounting rod 222. The connection method between the magnetic component 223 and the mounting rod 222 can be adhesive, snap-fit, plug-in, or threaded connection. This is not limited.

[0051] According to one embodiment of this utility model, a fixing cavity 2221 is provided inside the mounting rod 222, and the magnetic component 223 is accommodated and confined within the fixing cavity 2221. In this embodiment, the magnetic component 223 is fixed within the fixing cavity 2221 to prevent it from loosening and falling off during the floating and sinking movement of the mounting rod 222, thus improving installation stability. Optionally, the fixing cavity 2221 is an independent cavity and is not connected to the receiving cavity 211. When the magnetic component 223 is a magnet, water in the receiving cavity 211 will not enter the fixing cavity 2221, thereby preventing the magnet from contacting water, preventing rusting, and extending the service life of the magnet.

[0052] According to one embodiment of the present invention, the main body 221 includes a float 2211 and a plug 2212. The float 2211 is movably disposed in the receiving cavity 211, and one end of the mounting rod 222 is connected to the bottom of the float 2211. The plug 2212 is connected to the top of the float 2211 and is used to block or open the first water outlet 12.

[0053] Understandably, the float 2211 is relatively large in size because it needs to be controlled to float, which makes it inconvenient to block the first outlet 12. Therefore, a plug 2212 is connected to the top of the float 2211. The plug 2212 is smaller in volume than the float 2211, so it moves closer to or further away from the first outlet 12 under the action of the float 2211, thereby blocking or opening the first outlet 12.

[0054] According to one embodiment of this utility model, the end of the plug 2212 away from the float 2211 is provided with a blocking platform, the diameter of which gradually decreases in the direction away from the float 2211. It is understood that one end of the plug 2212 is connected to the float 2211, and the connection method can be snap-fit, adhesive, or plug-in. Of course, the two can also be an integrally formed structure, which is not limited here. To better automatically seal the first outlet 12, the blocking platform is provided with a conical structure, that is, the diameter of the end of the blocking platform away from the float 2211 is smaller, so as to facilitate insertion into the first outlet 12, while the diameter of the end of the blocking platform adjacent to the float 2211 is larger, which can stop and abut against the outside of the first outlet 12, achieving complete sealing of the first outlet 12. The conical structure of the blocking platform facilitates guiding the blocking platform into the first outlet 12, avoiding the situation where the plug 2212 cannot be aligned and sealed in the first outlet 12 due to positional displacement caused by floating.

[0055] According to one embodiment of the present invention, the inner wall of the first outlet 12 is rounded at one end adjacent to the liquid level balancing device 2. It is understood that the rounded corner treatment better guides the plug 2212 to move into the first outlet 12, reducing the possibility that the plug 2212 may not be aligned with the first outlet 12 for sealing.

[0056] According to one embodiment of the present invention, the coil assembly 3 includes a protective shell 32, and a connecting pipe section 212 is formed at the bottom of the mounting shell 21. The connecting pipe section 212 is used to connect the heating device 4. The protective shell 32 is sleeved on the connecting pipe section 212, and the protective shell 32 and the connecting pipe section 212 enclose each other to form a receiving cavity 33, in which the coil 31 is accommodated.

[0057] Understandably, the protective shell 32 is sleeve-shaped, with a diameter larger than that of the connecting pipe section 212. This allows the inner wall of the sleeve and the outer wall of the connecting pipe section 212 to form a receiving cavity 33 when the sleeve is fitted over the connecting pipe section 212. The coil 31 is housed within the receiving cavity 33, and the protective shell 32 protects the coil 31 from damage by other components. Simultaneously, the protective shell 32 covers the coil 31 to restrict its displacement, preventing the coil 31 from moving out of the floating area of ​​the magnetic component 223, thus preventing the magnetic component 223 from being unable to extend into the coil 31. Understandably, the protective shell 32 may have wiring holes to facilitate wiring between the coil 31 and the control circuit.

[0058] According to one embodiment of the present invention, the receiving cavity 211 is divided into a water supply cavity 2112 and an installation cavity 2111, and the water supply cavity 2112 and the installation cavity 2111 are connected. The installation cavity 2111 is correspondingly connected to the first water outlet 12, and the float module 22 is movably disposed in the installation cavity 2111.

[0059] Understandably, the mounting cavity 2111 is adapted to the float module 22 to limit the float module 22 to move only in the direction of approaching and moving away from the first water outlet 12, preventing the float module 22 from shifting to a position where it cannot correspond to and block the first water outlet 12. For example, the mounting cavity 2111 is a cylindrical cavity that extends vertically corresponding to the first water outlet 12, so that the float module 22 floats and sinks in the extension direction of the mounting cavity 2111, thereby moving away from or closer to the first water outlet 12. The side wall of the mounting cavity 2111 stops the float module 22 to prevent it from shifting to a position where it cannot correspond to the first water outlet 12. At the same time, in order to increase the water storage capacity of the receiving cavity 211, a water supply cavity 2112 is provided to communicate with the mounting cavity 2111, so that the water flowing into the mounting cavity 2111 from the first water outlet 12 can flow to the water supply cavity 2112, thereby ensuring the water supply from the receiving cavity 211 to the heating device 4. For example, the positional relationship between the water supply cavity 2112 and the installation cavity 2111 can be a left-right structure, an up-down structure, or a semi-enclosed structure, and is not limited here.

[0060] like Figure 2 and Figure 4As shown, according to one embodiment of the present invention, a control valve 9 is provided between the connecting pipe section 212 and the heating device 4. It is understood that the control valve 9 is provided on the pipe connecting the connecting pipe section 212 and the heating device 4 to control the water supply from the receiving cavity 211 to the heating device 4 via the connecting pipe section 212, facilitating the control of the water supply to the heating device 4. According to one embodiment of the present invention, the control valve 9 is a one-way valve to prevent water in the heating device 4 from flowing back to the liquid level balancing device 2. Exemplarily, the heating device 4 includes a heating tube and a thermostat. The heating tube has an L-shaped structure, with one end connected to the connecting pipe section 212 via a pipe. The thermostat is located on the heating tube to control the heating temperature. The other end of the heating tube can be connected to the subsequent brewing module 6 via a pipe to provide hot water for brewing coffee in the brewing module 6.

[0061] In one embodiment, the coffee machine further includes a brewing module 6, a liquid receiving module 7, and a heat preservation module 8. The brewing module 6 is connected to a heating device 4 via a pipe. The heating device 4 heats the water flow, ensuring that hot water flows into the coffee powder container of the brewing module 6 and mixes with the coffee powder inside. The brewed coffee flows into the liquid receiving module 7 below the brewing module 6, such as into a coffee cup. The heat preservation module 8 is located below the liquid receiving module 7 to maintain the temperature of the coffee inside the liquid receiving module 7 and ensure the quality of the coffee.

[0062] 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: A water tank, wherein the water tank is provided with a water storage chamber and a first water outlet connected to the water storage chamber; A liquid level balancing device includes a mounting shell and a float module. The mounting shell is connected to the water tank and has a receiving cavity inside. The receiving cavity is connected to the first water outlet. The float module is movably disposed in the receiving cavity and can move closer to or further away from the first water outlet as the water level rises or falls. The float module is equipped with a magnetic component. A coil assembly, wherein the coil assembly is provided with a coil wound around the outer wall of the mounting housing, the coil is connected to a control circuit, and the coil is used to sense the position change of the magnetic component; A heating device, which is connected to a liquid level balancing device, is used to heat the water discharged by the liquid level balancing device.

2. The coffee machine according to claim 1, characterized in that, When the magnetic component is located inside the coil, the heating device stops heating.

3. The coffee machine according to claim 1, characterized in that, The float module includes: The main body is movably disposed in the receiving cavity and can move closer to or further away from the first outlet as the water level rises or falls; A mounting rod is connected to the main body, and a magnetic component is connected to the mounting rod. The mounting rod, when the main body moves, causes the magnetic component to extend into or retract from the coil.

4. The coffee machine according to claim 3, characterized in that, The inner wall of the receiving cavity is provided with a sliding groove, and the float module moves along the extension direction of the sliding groove to get closer to or away from the first water outlet.

5. The coffee machine according to claim 3, characterized in that, The mounting shell has a vent hole that connects the receiving cavity to the outside.

6. The coffee machine according to claim 3, characterized in that, The mounting rod has a fixed cavity, and the magnetic component is accommodated and confined within the fixed cavity.

7. The coffee machine according to claim 3, characterized in that, The body includes: A float is movably disposed within the receiving cavity, and one end of the mounting rod is connected to the bottom of the float. A plug is attached to the top of the float and is used to block or open the first outlet.

8. The coffee machine according to claim 7, characterized in that, The end of the plug away from the float is provided with a blocking platform, and the diameter of the blocking platform gradually decreases in the direction away from the float.

9. The coffee machine according to claim 1, characterized in that, The coil assembly includes a protective shell, and a connecting pipe section is formed at the bottom of the mounting shell. The connecting pipe section is used to connect the heating device. The protective shell is sleeved on the connecting pipe section, and the protective shell and the connecting pipe section enclose a receiving cavity, in which the coil is housed.

10. The coffee machine according to any one of claims 1 to 9, characterized in that, The accommodating cavity is divided into a water supply cavity and an installation cavity, and the water supply cavity and the installation cavity are connected. The installation cavity is correspondingly connected to the first water outlet, and the float module is movably disposed in the installation cavity.

11. The coffee machine according to claim 9, characterized in that, A control valve is provided between the connecting pipe section and the heating device, and the control valve is a one-way valve.

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