Automatic coffee maker

Abstract

The utility model discloses an automatic brewing coffee machine belongs to coffee making process technical field, wherein, including main part, water tank, key, connecting pipeline, main part has control circuit board, liquid level detection sensor, and water tank is detachably connected with main part, and connecting pipeline is installed in main part, and liquid level detection sensor is set up close to the first end of connecting pipeline, and the second end of connecting pipeline is communicated with water tank, and the liquid level of connecting pipeline and the liquid level in water tank are located on the same plane, liquid level detection sensor is used for detecting the liquid level state of connecting pipeline, water tank cooperates with key, and key is electrically connected with liquid level detection sensor, and liquid level detection sensor is electrically connected with control circuit board. Through water tank trigger key, liquid level detection sensor stops work after water tank removal, prevents liquid level detection sensor to take place the detection phenomenon of error, realizes the normal brewing function of coffee.

Description

Technical Field

[0001] This utility model relates to the technical field of coffee making process, and in particular to an automatic coffee brewing machine. Background Technology

[0002] In existing technology, coffee machines generally consist of a water tank and a main body. The main body is used for grinding coffee, while the water in the tank is used for brewing. Currently, coffee machines on the market either have a separate water tank and a single integrated structure. Coffee machines with an integrated structure require moving the entire machine to fill with water, or using a container to collect the water before pouring it into the tank. This type of integrated coffee machine is not very convenient to use.

[0003] Therefore, a more common design in the market is to separate the main body and water tank of the coffee machine. When the water tank is low, it is removed to refill, and then the filled water tank is inserted back into the main body. The main body contains a liquid level sensor and a connecting tube, which forms a communication device with the water tank, ensuring the liquid levels are the same. The liquid level sensor detects the water tank's level to determine its capacity. However, when the water tank is removed, one end of the connecting tube is sealed, and the liquid level does not change. The liquid level sensor mistakenly interprets the liquid level in the connecting tube as the water tank's level, causing the operating system to mistakenly believe the coffee machine still has water, preventing proper brewing. Summary of the Invention

[0004] The purpose of this invention is to improve the problem that existing automatic coffee makers cannot accurately identify the water capacity, which leads to the inability to brew coffee properly, and to provide an automatic coffee maker.

[0005] The technical solutions for achieving the above objectives include the following:

[0006] An automatic coffee maker includes a main body, a water tank, a power switch, and a connecting pipe. The main body has a control circuit board and a liquid level detection sensor. The water tank is detachably connected to the main body. The connecting pipe is installed inside the main body. The liquid level detection sensor is located near the first end of the connecting pipe. The second end of the connecting pipe is connected to the water tank. The liquid level in the connecting pipe and the liquid level in the water tank are on the same plane.

[0007] The control circuit board has at least a first brewing setting and a second brewing setting. The water tank has at least a first liquid level and a second liquid level. The first liquid level corresponds to the first brewing setting, and the second liquid level corresponds to the second brewing setting. The liquid level detection sensor is used to detect the liquid level status of the connected pipe. The water tank cooperates with the switch. The switch is electrically connected to the liquid level detection sensor, and the liquid level detection sensor is electrically connected to the control circuit board.

[0008] In one embodiment, the main body includes a housing and a connecting seat. The connecting seat is installed on one side of the housing. The first end of the connecting pipe is disposed inside the housing. The second end of the connecting pipe is disposed on the connecting seat. The connecting seat has a first sealing component. The bottom of the water tank has a second sealing component. The first sealing component is located below the second sealing component. The first sealing component cooperates with the second sealing component.

[0009] In one embodiment, the first sealing assembly includes a first sealing plug, a first elastic element, and a first support base. The first end of the first support base is installed on the second end of the connecting pipe and communicates with the connecting pipe. The second end of the first support base is installed on the connecting base.

[0010] The first support has a water inlet, the first end of the first sealing plug is installed inside the water inlet and abuts against the first support; the first elastic member is sleeved outside the first sealing plug, and the two ends of the first elastic member abut against the second end of the first sealing plug and the first support, respectively.

[0011] The first sealing plug has a first through groove, and the first sealing plug has a first movable position and a second movable position. In the first movable position, the first through groove is connected to the water inlet; in the second movable position, the first through groove is disconnected from the water inlet.

[0012] In one embodiment, the first sealing assembly further includes a sealing ring fitted over the first sealing plug, wherein the first sealing plug is in a second movable position, the sealing ring abuts against the inner wall of the first support base, and closes the water inlet.

[0013] In one embodiment, the first sealing assembly further includes a support member, which includes a limiting block and a first support ring. The first support base includes a first connecting ring and a second connecting ring. The first connecting ring is sleeved on the outside of the connecting pipe, the first support ring is installed on the connecting base, and the first support ring is sleeved on the outside of the second connecting ring. The limiting block cooperates with the second sealing assembly.

[0014] In one embodiment, the second sealing assembly includes a second sealing plug, a second support base, and a second elastic member. The second support base has a water outlet, and the second sealing plug is installed at the water outlet. The first end of the second sealing plug abuts against the second support base. The second elastic member is sleeved outside the second sealing plug, and both ends of the second elastic member abut against the second end of the second sealing plug and the second support base, respectively.

[0015] In one embodiment, the second support has a communicating groove, the outer wall of the second sealing plug has a second through groove, and the second sealing plug has a first moving position and a second moving position. In the first moving position, the second through groove is connected to the water outlet, and the second through groove is connected to the first through groove through the communicating groove; in the second moving position, the second through groove is disconnected from the water outlet.

[0016] In one embodiment, the second support base includes a second support ring and a support plate, the support plate and the second support ring are an integral structure, the water outlet is opened on the support plate, the second support ring is installed on the connecting base, the outer wall of the second support ring has a groove, and the limiting block at least partially cooperates with the groove.

[0017] In one embodiment, the water tank has a chamber, the first end of the connecting pipe is higher than the maximum liquid level in the chamber, and the second end of the connecting pipe is connected to the external atmospheric pressure.

[0018] The technical solution provided by this utility model has the following advantages and effects:

[0019] When the water tank is installed on the main body, the inner wall of the water tank touches the switch on the main body. The switch sends an electrical signal to activate the liquid level detection sensor, making the liquid level detection sensor electrically connected to the control circuit board. Since the liquid level detection sensor is located near the first end of the connecting pipe, and the second end of the connecting pipe is connected to the water tank, the liquid level in the connecting pipe and the liquid level in the water tank are on the same plane. Therefore, the liquid level detection sensor can indirectly detect the liquid level in the water tank by detecting the liquid level in the connecting pipe, and thus determine the water capacity in the water tank.

[0020] Furthermore, when the water tank is removed from the main body, the water tank does not activate the on / off switch. The on / off switch disconnects the connection between the level detection sensor and the control circuit board, and the level detection sensor is in a non-operating state. By triggering the on / off switch through the water tank, the second end of the connecting pipe can be sealed after the water tank is removed, preventing water from flowing out of the main body. At the same time, the level detection sensor stops operating after the water tank is removed, preventing erroneous detection and ensuring normal coffee brewing. Attached Figure Description

[0021] The accompanying drawings illustrate specific examples of the technical solutions described in this utility model, and together with the detailed embodiments, form part of the specification, serving to explain the technical solutions, principles, and effects of this utility model.

[0022] Unless otherwise specified or defined, the same reference numerals in different figures represent the same or similar technical features, and different reference numerals may be used to represent the same or similar technical features.

[0023] Figure 1 This is a schematic diagram of an automatic coffee brewing machine according to one embodiment of the present invention;

[0024] Figure 2 This is a cross-sectional view of an automatic coffee brewing machine according to one embodiment of the present invention;

[0025] Figure 3 This is a cross-sectional view of the water tank and the connecting seat in one embodiment of the present invention. Figure 1 ;

[0026] Figure 4 This is a cross-sectional view of the water tank and the connecting seat in one embodiment of the present invention. Figure 2 ;

[0027] Figure 5 This is one embodiment of the present invention. Figure 3 Enlarged view of point A;

[0028] Figure 6 This is one embodiment of the present invention. Figure 4 Enlarged view of point B;

[0029] Figure 7 This is an enlarged schematic diagram of the first sealing component and the connecting seat in one embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the water tank level in one embodiment of the present invention;

[0031] Explanation of reference numerals in the attached figures:

[0032] 100. Coffee machine; 1. Main body; 11. Connecting seat; 12. Power switch; 13. First sealing assembly; 131. First sealing plug; 1311. First through groove; 1312. Abutting part; 1313. Connecting part; 132. First elastic element; 133. Sealing ring; 134. Support member; 1341. Limiting block; 1342. First support ring; 135. First support base; 1351. First connecting ring; 1352. Second connecting ring; 1353. Water inlet; 14. Connecting pipe; 15. Liquid level detection sensor; 16. Coffee basket; 17. Outer shell; 2. Water tank; 20. Second sealing assembly; 21. Chamber; 22. Second sealing plug; 23. Second support base; 231. Second support ring; 232. Support plate; 233. Communicating groove. Detailed Implementation

[0033] To facilitate understanding of this utility model, the specific embodiments of this utility model will be described in more detail below with reference to the accompanying drawings.

[0034] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0035] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0036] It should be noted that when a component is considered "fixed" to another component, it can be directly fixed to the other component or there can be an intervening component; when a component is considered "connected" to another component, it can be directly connected to the other component or there can be an intervening component; when a component is considered "mounted" on another component, it can be directly mounted on the other component or there can be an intervening component; when a component is considered "placed" on another component, it can be directly placed on the other component or there can be an intervening component.

[0037] This utility model proposes an automatic coffee brewing machine 100, such as Figures 1 to 7 As shown, the device includes a main body 1, a water tank 2, a switch 12, and a connecting pipe 14. The main body 1 has a control circuit board and a liquid level sensor 15. The water tank 2 is detachably connected to the main body 1. The connecting pipe 14 is installed inside the main body 1. The liquid level sensor 15 is located near the first end of the connecting pipe 14. The second end of the connecting pipe 14 is connected to the water tank 2. The liquid level in the connecting pipe 14 and the liquid level in the water tank 2 are on the same plane. The control circuit board has at least a first brewing setting and a second brewing setting. The first liquid level corresponds to the first brewing setting, and the second liquid level corresponds to the second brewing setting. The liquid level sensor 15 is used to detect the liquid level status of the connecting pipe 14. The water tank 2 cooperates with the switch 12. The switch 12 is electrically connected to the liquid level sensor 15, and the liquid level sensor 15 is electrically connected to the control circuit board.

[0038] Specifically, when the water tank 2 is installed on the main body 1, the inner wall of the water tank 2 touches the switch 12 on the main body 1. The switch 12 sends an electrical signal to activate the liquid level detection sensor 15, so that the liquid level detection sensor 15 is electrically connected to the control circuit board. Since the liquid level detection sensor 15 is located near the first end of the connecting pipe 14, and the second end of the connecting pipe 14 is connected to the water tank 2, the liquid level in the connecting pipe 14 and the liquid level in the water tank 2 are on the same plane. Therefore, the liquid level detection sensor 15 can indirectly detect the liquid level height in the water tank 2 by detecting the liquid level in the connecting pipe 14, and thus determine the water capacity in the water tank 2.

[0039] Furthermore, when the water tank 2 is removed from the main body 1, the water tank 2 does not activate the switch 12. The switch 12 disconnects the connection between the liquid level detection sensor 15 and the control circuit board, and the liquid level detection sensor 15 is in a non-operating state. By triggering the switch 12 through the water tank 2, the second end of the connecting pipe 14 can be sealed after the water tank 2 is removed, preventing water from flowing out of the main body 1. At the same time, the liquid level detection sensor 15 stops operating after the water tank 2 is removed, preventing the liquid level detection sensor 15 from malfunctioning and enabling normal coffee brewing.

[0040] Furthermore, the water tank 2 has at least a first liquid level and a second liquid level. The first liquid level corresponds to a first brewing setting, and the second liquid level corresponds to a second brewing setting. When the liquid level detection sensor 15 detects that the water tank 2 is at the first liquid level, the liquid level detection sensor 15 causes the control circuit board to generate a first electrical signal. The first electrical signal controls the first brewing setting to complete the brewing operation, which can brew three cups of coffee. When the liquid level detection sensor 15 detects that the water tank 2 is at the second liquid level, the liquid level detection sensor 15 causes the control circuit board to generate a second electrical signal. The second electrical signal controls the second brewing setting to complete the brewing operation, which can brew ten cups of coffee. It should be noted that there is a significant difference in the number of cups of coffee brewed at the first and second brewing settings. Therefore, the liquid level detection sensor 15 can quantitatively brew the number of cups of coffee by detecting the capacity of the water tank 2.

[0041] In some embodiments, the main body 1 includes a housing 17 and a connecting seat 11. The connecting seat 11 is installed on one side of the housing 17. The connecting pipe 14 is U-shaped, with its first end disposed inside the housing 17 and its second end disposed on the connecting seat 11. The connecting seat 11 has a first sealing component 13, and the bottom of the water tank 2 has a second sealing component 20. The first sealing component 13 is located below the second sealing component 20 and cooperates with the second sealing component 20. Specifically, the housing 17 is used to place a coffee basket 16, which is used to hold coffee powder to be brewed. The bottom of the water tank 2 is connected to the coffee basket 16 of the housing 17 through the connecting pipe 14. When the water tank 2 is removed, the first sealing component 13 seals the water inlet 1353 on the connecting seat 11 to prevent water from overflowing from the connecting seat 11. Moreover, after the water tank 2 is removed, the second sealing component 20 also seals the water outlet of the water tank 2 to prevent water from overflowing. The water tank 2 is vertically installed on the connecting seat 11. Under the interaction of the first sealing component 13 and the second sealing component 20, the water tank 2 is connected to the connecting pipe 14.

[0042] Preferably, the first sealing assembly 13 includes a first sealing plug 131, a first elastic element 132, and a first support base 135. The first end of the first support base 135 is installed on the second end of the connecting pipe 14 and communicates with the connecting pipe 14. The second end of the first support base 135 is installed on the connecting base 11. The first support base 135 has a water inlet 1353. The first end of the first sealing plug 131 is installed inside the water inlet 1353 and abuts against the first support base 135. The first elastic element 132 is sleeved on the outside of the first sealing plug 131, and the two ends of the first elastic element 132 abut against the second end of the first sealing plug 131 and the first support base 135, respectively. The first sealing plug 131 has a first through groove 1311 and has a first moving position and a second moving position. In the first moving position, the first through groove 1311 communicates with the water inlet 1353. In the second moving position, the first through groove 1311 is disconnected from the water inlet 1353.

[0043] Specifically, the first support base 135 is sleeved on the connecting pipe 14, and the inlet 1353 on the first support base 135 is connected to the connecting pipe 14. The first sealing plug 131 is disposed at the inlet 1353, and the first elastic member 132 is sleeved on the first sealing plug 131, with both ends of the first elastic member 132 abutting against the second end of the first sealing plug 131 and the first support base 135, respectively. When the second sealing assembly 20 of the water tank 2 squeezes the first sealing plug 131, the first sealing plug 131 moves to the first moving position, and the first through groove 1311 connects with the inlet 1353, thereby opening the connecting pipe 14. The first elastic element 132 is compressed by the first sealing plug 131 and has a certain reverse force. When the second sealing component 20 is removed from the first sealing plug 131, the first sealing plug 131 moves to the second moving position and abuts against the inner wall of the water inlet 1353, so that the first through groove 1311 is disconnected from the water inlet 1353, thus achieving a sealed connection to the pipe 14.

[0044] Furthermore, during operation, simply align the water tank 2 with the first sealing component 13, so that the second sealing component 20 of the water tank 2 acts on the first sealing plug 131 on the first sealing component 13, and the second end of the connecting pipe 14 can be opened, making the operation convenient and quick.

[0045] Preferably, the first sealing plug 131 has an abutting portion 1312 and a mating portion 1313. The abutting portion 1312 is used to abut against the first elastic member 132 to limit the installation position of the first elastic member 132. The mating portion 1313 is used to abut against the second sealing plug 22 and limit the second sealing plug 22 to improve the stability when the second sealing plug 22 abuts against the first sealing plug 131.

[0046] Preferably, the first sealing assembly 13 further includes a sealing ring 133, which is fitted over the first sealing plug 131. In the second movable position, the sealing ring 133 abuts against the inner wall of the first support base 135, closing the water inlet 1353. Specifically, by fitting the sealing ring 133 over the first sealing plug 131, the sealing ring 133 has a certain elasticity. When the first sealing plug 131 is in the second movable position, the outer wall of the sealing ring 133 abuts against the inner wall of the first support base 135, improving the sealing performance of the first sealing plug 131 over the water inlet 1353.

[0047] Preferably, the first sealing assembly 13 further includes a support member 134, which includes a limiting block 1341 and a first support ring 1342. The first support seat 135 includes a first connecting ring 1351 and a second connecting ring 1352. The first connecting ring 1351 is sleeved on the outside of the connecting pipe 14, the first support ring 1342 is installed on the connecting seat 11, and the first support ring 1342 is sleeved on the outside of the second connecting ring 1352. The limiting block 1341 cooperates with the second sealing assembly 20. Specifically, the first connecting ring 1351 is used to be installed on the connecting pipe 14, and the second connecting ring 1352 is used to support the first support ring 1342 and improve the stability of the first support ring 1342 on the connecting seat 11. The first support ring 1342 is used to support the second sealing assembly 20. The second sealing assembly 20 is aligned with the center of the first support ring 1342 and cooperates with the limiting block 1341. By pressing the water tank 2, the second sealing assembly 20 squeezes the first sealing plug 131, thereby moving the first sealing plug 131 and opening the water inlet 1353 of the first sealing assembly 13.

[0048] In some embodiments, the second sealing assembly 20 includes a second sealing plug 22, a second support base 23, and a second elastic member (not shown in the figure). The second support base 23 has a water outlet, and the second sealing plug 22 is installed at the water outlet, with the first end of the second sealing plug 22 abutting against the second support base 23. The second elastic member is sleeved on the second sealing plug 22, and both ends of the second elastic member abut against the second end of the second sealing plug 22 and the second support base 23, respectively. Specifically, when the second sealing assembly 20 of the water tank 2 is aligned with the first sealing assembly 13, the second support base 23 drives the second sealing plug 22 to move, and the second sealing plug 22 squeezes the first sealing plug 131, causing the first sealing plug 131 to move to the first moving position and open the water inlet 1353, so that the first through groove 1311 communicates with the water inlet 1353. When the first sealing plug 131 can no longer move downwards, it continues to be squeezed. The reaction force generated by the first sealing plug 131 pushes the second sealing plug 22 to move. When the second sealing plug 22 moves, it compresses the second elastic element, causing the second elastic element to generate a reaction force. The second support seat 23 continues to move, causing the second support seat 23 to engage with the limiting block 1341. The limiting block 1341 limits the second support seat 23, fixing the second support seat 23 to the support member 134, thus realizing the cooperation between the first sealing assembly 13 and the second sealing assembly 20.

[0049] Preferably, the second support base 23 has a connecting groove 233, and the outer wall of the second sealing plug 22 has a second through groove. The second sealing plug 22 has a first moving position and a second moving position. In the first moving position, the second through groove is connected to the water outlet, and the second through groove is connected to the first through groove 1311 through the connecting groove 233. In the second moving position, the second through groove is disconnected from the water outlet. Specifically, when the second support base 23 is engaged with the limiting block 1341, the second sealing plug 22 also moves to the first moving position and opens the water outlet, so that the second through groove is connected to the water outlet. Since the second through groove is connected to the first through groove 1311 through the connecting groove 233, when both the water outlet and the water inlet 1353 are opened, the water outlet, the second through groove, the connecting groove 233, the first through groove 1311, and the water inlet 1353 are sequentially connected, realizing the connection between the water tank 2 and the connecting pipe 14. When the water tank 2 is removed from the connecting seat 11, the first sealing plug 131 moves to the second moving position due to the reaction force of the first elastic element 132, sealing the water inlet 1353; while the second sealing plug 22 moves to the second moving position due to the reaction force of the second elastic element, sealing the water outlet, thus further achieving the sealing of the water tank 2 and the connecting seat 11.

[0050] Preferably, the second support base 23 includes a second support ring 231 and a support plate 232. The support plate 232 and the second support ring 231 are an integral structure. The water outlet is opened on the support plate 232. The second support ring 231 is installed on the connecting base 11. The outer wall of the second support ring 231 has a groove, and the limiting block 1341 at least partially cooperates with the groove. Specifically, the outer wall of the second support ring 231 has a groove, and the second support ring 231 cooperates with the limiting block 1341 through the groove to realize the detachable connection between the first sealing component 13 and the second sealing component 20. In this embodiment, the part of the limiting block 1341 that engages with the groove can be made of an elastic material, which facilitates the application of a certain force to separate the limiting block 1341 from the groove, and facilitates the removal of the water tank 2 from the connecting base 11.

[0051] Preferably, the water tank 2 has a chamber 21, with the first end of the connecting pipe 14 higher than the maximum liquid level in the chamber 21, and the second end of the connecting pipe 14 connected to the external atmospheric pressure. Specifically, since the first end of the connecting pipe 14 is higher than the maximum liquid level in the chamber 21, changes in the state of the water tank 2 are always reflected at the first end of the connecting pipe 14. Because both the water tank 2 and the connecting pipe 14 are connected to atmospheric pressure, the pressure is the same, and the liquid levels between the water tank 2 and the connecting pipe 14 are equal. The liquid level in the water tank 2 can be obtained by detecting the liquid level in the connecting pipe 14 using the liquid level detection sensor 15. Therefore, changes in the state of the water tank 2 will not cause the liquid level detection sensor 15 to fail. The liquid level detection sensor 15 is hidden inside the outer casing 17, forming a concealed structure with an aesthetically pleasing appearance.

[0052] This utility model also proposes a brewing method for an automatic coffee maker 100, such as... Figure 8 As shown, it includes the following steps:

[0053] The water tank 2 has a first liquid level B and a second liquid level A. The first liquid level B and the second liquid level A are fixed. The water level in the water tank 2 is a variable liquid level C. The variable liquid level C is a variable.

[0054] The first liquid level B has a first brewing quantity T, and the second liquid level A has a second brewing quantity P, wherein the second brewing quantity P is a multiple of the first brewing quantity T.

[0055] The first brewing setting corresponds to the first brewing quantity T, and the second brewing setting corresponds to the second brewing quantity P. The second brewing setting is a multiple of the first brewing setting.

[0056] When the liquid level sensor detects that the height of the variable liquid level C exceeds the first liquid level B and is lower than the second liquid level A, the first brewing setting is activated.

[0057] When the liquid level sensor 15 detects that the height of the variable liquid level C exceeds the second liquid level A, the first brewing mode or the second brewing mode is activated.

[0058] When the liquid level sensor 15 detects that the height of the variable liquid level C is lower than the first liquid level B, the first brewing mode and the second brewing mode cannot be activated.

[0059] Specifically, simply install the water tank 2 on the main body 1, connecting the water tank 2 to the connecting pipe 14. The switch 12 activates the liquid level detection sensor 15 to detect the liquid level in the water tank 2, achieving automatic detection of the liquid level position. By setting a first brewing level and a second brewing level corresponding to the first liquid level B and the second liquid level A, the first brewing quantity T is fixed at the first brewing level, but the variable liquid level C is variable. Therefore, by setting the first brewing quantity T, as long as the scale of the variable liquid level C is at the first liquid level B, the automatic coffee maker 100 will brew a fixed amount of coffee at different levels. Assuming two cups of coffee powder are to be brewed, the variable liquid level C of the water tank can be set higher than the second liquid level A. Since the second brewing quantity P is a multiple of the first brewing quantity T, and the second brewing level is a multiple of the first brewing level, operating the second brewing level allows for the precise brewing of multiple cups of coffee, avoiding excessive or insufficient water consumption and ensuring precise brewing of coffee powder. Since the second brewing quantity P is a multiple of the first brewing quantity T, the amount of water used to brew coffee powder can be precisely measured simply by setting the amount of water used for the first brewing quantity A.

[0060] When the liquid level sensor detects that the height of the variable liquid level C exceeds the first liquid level B and is lower than the second liquid level A, the first brewing mode is activated. The variable liquid level may still be between the first liquid level B and the second liquid level A, so the first brewing mode can be activated repeatedly.

[0061] When the liquid level sensor 15 detects that the height of the variable liquid level C exceeds the second liquid level A, it activates either the first or second brewing setting. Assuming the first brewing setting brews one cup, the height of the variable liquid level C may still exceed the second liquid level A after activation. When the second brewing setting is activated, it is a multiple of the first brewing setting, meaning it could brew two or three cups. Therefore, by simply adding the corresponding amount of coffee powder and activating the second brewing setting, multiple cups of coffee can be brewed at once.

[0062] When the liquid level sensor 15 detects that the height of the variable liquid level C is lower than the first liquid level B, the first brewing mode and the second brewing mode cannot be activated; this is to avoid brewing coffee when there is insufficient water.

[0063] When referencing drawings, new features are explained. To avoid redundant references to drawings that would make the description less concise, features already described will not be referenced again on the drawings if the description is clear.

[0064] The purpose of the above embodiments is to reproduce and derive the technical solution of this utility model by way of example, and to fully describe the technical solution, purpose and effect of this utility model. The purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosed content of this utility model, and it is not intended to limit the protection scope of this utility model.

[0065] The above embodiments are not an exhaustive list based on the present invention, and there may be other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. An automatic coffee brewing machine, characterized in that, The device includes a main body, a water tank, a switch, and a connecting pipe. The main body has a control circuit board and a liquid level detection sensor. The water tank is detachably connected to the main body. The connecting pipe is installed inside the main body. The liquid level detection sensor is located near the first end of the connecting pipe. The second end of the connecting pipe is connected to the water tank. The liquid level in the connecting pipe and the liquid level in the water tank are on the same plane. The control circuit board has at least a first brewing setting and a second brewing setting. The water tank has at least a first liquid level and a second liquid level. The first liquid level corresponds to the first brewing setting, and the second liquid level corresponds to the second brewing setting. The liquid level detection sensor is used to detect the liquid level status of the connected pipe. The water tank cooperates with the switch. The switch is electrically connected to the liquid level detection sensor, and the liquid level detection sensor is electrically connected to the control circuit board.

2. The automatic coffee maker as described in claim 1, characterized in that, The main body includes a shell and a connecting seat. The connecting seat is installed on one side of the shell. The first end of the connecting pipe is disposed inside the shell. The second end of the connecting pipe is disposed on the connecting seat. The connecting seat has a first sealing component. The bottom of the water tank has a second sealing component. The first sealing component is located below the second sealing component. The first sealing component cooperates with the second sealing component.

3. The automatic coffee maker as described in claim 2, characterized in that, The first sealing assembly includes a first sealing plug, a first elastic element, and a first support base. The first end of the first support base is installed on the second end of the connecting pipe and communicates with the connecting pipe. The second end of the first support base is installed on the connecting base. The first support has a water inlet, the first end of the first sealing plug is installed inside the water inlet and abuts against the first support; the first elastic member is sleeved outside the first sealing plug, and the two ends of the first elastic member abut against the second end of the first sealing plug and the first support, respectively. The first sealing plug has a first through groove, and the first sealing plug has a first movable position and a second movable position. In the first movable position, the first through groove is connected to the water inlet; in the second movable position, the first through groove is disconnected from the water inlet.

4. The automatic coffee maker as described in claim 3, characterized in that, The first sealing assembly also has a sealing ring, which is sleeved outside the first sealing plug. In the second movable position, the sealing ring abuts against the inner wall of the first support and closes the water inlet.

5. The automatic coffee maker as described in claim 3, characterized in that, The first sealing assembly also has a support member, which includes a limiting block and a first support ring. The first support base includes a first connecting ring and a second connecting ring. The first connecting ring is sleeved on the outside of the connecting pipe. The first support ring is installed on the connecting base. The first support ring is sleeved on the outside of the second connecting ring. The limiting block cooperates with the second sealing assembly.

6. The automatic coffee maker as described in claim 5, characterized in that, The second sealing assembly includes a second sealing plug, a second support base, and a second elastic member. The second support base has a water outlet, and the second sealing plug is installed at the water outlet. The first end of the second sealing plug abuts against the second support base. The second elastic member is sleeved outside the second sealing plug, and both ends of the second elastic member abut against the second end of the second sealing plug and the second support base, respectively.

7. The automatic coffee maker as described in claim 6, characterized in that, The second support has a connecting groove, the outer wall of the second sealing plug has a second through groove, and the second sealing plug has a first moving position and a second moving position. In the first moving position, the second through groove is connected to the water outlet, and the second through groove is connected to the first through groove through the connecting groove; in the second moving position, the second through groove is disconnected from the water outlet.

8. The automatic coffee maker as described in claim 6, characterized in that, The second support base includes a second support ring and a support plate. The support plate and the second support ring are an integral structure. The water outlet is opened on the support plate. The second support ring is installed on the connecting base. The outer wall of the second support ring has a groove. The limiting block at least partially cooperates with the groove.

9. The automatic coffee maker as described in any one of claims 1 to 8, characterized in that, The water tank has a chamber, the first end of the connecting pipe is higher than the maximum liquid level in the chamber, and the second end of the connecting pipe is connected to the external atmospheric pressure.

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