Automatic coffee brewing machine and brewing method

Abstract

The invention discloses an automatic coffee brewing machine and a brewing method.The automatic coffee brewing machine comprises a main body, a water tank, an on-off key and a connecting pipeline, the main body is provided with a control circuit board and a liquid level detection sensor, the water tank is detachably connected with the main body, and the connecting pipeline is installed in the main body; the liquid level detection sensor is arranged close to the first end of the connecting pipeline, the second end of the connecting pipeline communicates with the water tank, and the liquid level of the connecting pipeline and the liquid level in the water tank are located on the same plane. The liquid level detection sensor is used for detecting the liquid level state of the connecting pipeline; the water tank is matched with the on-off key, the on-off key is electrically connected with the liquid level detection sensor, and the liquid level detection sensor is electrically connected with the control circuit board. The switch key is triggered through the water tank, the liquid level detection sensor stops working after the water tank is removed, the liquid level detection sensor is prevented from detecting mistakenly, and the normal coffee brewing function is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of coffee making technology, in particular to an automatic coffee brewing machine and a brewing method. Background Art

[0002] In the prior art, coffee machines generally include a water tank and a main body. The main body is used for grinding coffee, and the water in the water tank is used for brewing coffee. In coffee machines currently on the market, the water tank and the main body are either separate or integrated. When adding water to a coffee machine with an integrated structure, the entire machine must be moved, or water must be collected in a container and then poured into the water tank. This makes it inconvenient to use such a machine.

[0003] For this reason, it's becoming increasingly popular to separate the coffee machine's main body and water tank. When the water tank is low on water, the machine removes the water tank to fill it with water, then inserts the filled water tank back into the main body. The main body houses a liquid level sensor and a connecting pipe. The connecting pipe forms a communication channel with the water tank, ensuring the liquid levels are aligned. The liquid level sensor detects the level in the water tank and determines its capacity. However, when the water tank is removed, one end of the connecting pipe becomes sealed, and the liquid level remains unchanged. The liquid level sensor mistakenly interprets the level in the connecting pipe as the level in the water tank, causing the operating system to mistakenly believe the coffee machine still has a sufficient amount of water, resulting in coffee not brewing properly. Summary of the Invention

[0004] The purpose of the present invention is to improve the problem that the water capacity in the existing automatic coffee brewing machine cannot be accurately identified, resulting in the inability to brew coffee normally, and to provide an automatic coffee brewing machine and a brewing method.

[0005] The technical solutions to achieve the above objectives include the following:

[0006] An automatic coffee brewing machine includes a main body, a water tank, an on / off 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 in the main body. The liquid level detection sensor is disposed near a first end of the connecting pipe. A 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 located on the same plane.

[0007] The control circuit board has at least a first brewing gear and a second brewing gear, the water tank has at least a first liquid level and a second liquid level, the first liquid level corresponds to the first brewing gear, and the second liquid level corresponds to the second brewing gear. The liquid level detection sensor is used to detect the liquid level status of the connecting pipe; the water tank cooperates with the switch key, the switch key 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 an outer shell and a connecting seat, the connecting seat is installed on one side of the outer shell, the first end of the connecting pipe is arranged in the outer shell, and the second end of the connecting pipe is arranged on the connecting seat, the connecting seat has a first sealing component, and the bottom of the water tank has a second sealing component, the first sealing component is located below the second sealing component, and 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 member, and a first support seat, wherein the first end of the first support seat is mounted on the second end of the connecting pipe and communicates with the connecting pipe, and the second end of the first support seat is mounted on the connecting seat;

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

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

[0012] In one embodiment, the first sealing assembly further includes a sealing ring, which is sleeved on the outside of the first sealing plug. When the first sealing plug is in the second moving position, the sealing ring abuts against the inner wall of the first support seat and closes the water inlet.

[0013] In one embodiment, the first sealing assembly further has a support member, the support member includes a limit block and a first support ring, the first support seat includes a first connecting ring and a second connecting ring, the first connecting ring is sleeved outside the connecting pipe, the first support ring is installed on the connecting seat, the first support ring is sleeved outside the second connecting ring, and the limit block cooperates with the second sealing assembly.

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

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

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

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

[0018] The present invention also provides a brewing method of an automatic coffee brewing machine, comprising the following steps:

[0019] The water tank has a first liquid level and a second liquid level, the first liquid level and the second liquid level are fixed, the water level of the water tank is a variable liquid level, and the variable liquid level is a variable;

[0020] The first liquid level has a first brewing quantity, the second liquid level has a second brewing quantity, and the second brewing quantity is a multiple of the first brewing quantity;

[0021] The first brewing gear corresponds to the first brewing quantitative amount, the second brewing gear corresponds to the second brewing quantitative amount, and the second brewing gear is a multiple of the first brewing gear;

[0022] When the liquid level detection sensor detects that the height of the variable liquid level exceeds the first liquid level and is lower than the second liquid level, the first brewing gear is started;

[0023] When the liquid level detection sensor detects that the height of the variable liquid level exceeds the second liquid level, the first brewing gear or the second brewing gear is started;

[0024] When the liquid level detection sensor detects that the height of the variable liquid level is lower than the first liquid level, the first brewing gear and the second brewing gear cannot be started.

[0025] The technical solution provided by the present invention has the following advantages and effects:

[0026] When the water tank is installed on the main body, the inner wall of the water tank touches the switch key on the main body, and the switch key sends an electrical signal to start the liquid level detection sensor, so that the liquid level detection sensor is electrically connected to the control circuit board; since the liquid level detection sensor is arranged close to the first end of the connecting pipe, the second end of the connecting pipe is connected to the water tank, and the liquid level of the connecting pipe and the liquid level in the water tank are on the same plane, the liquid level detection sensor can indirectly detect the liquid level height in the water tank by detecting the liquid level in the connecting pipe, thereby judging the water capacity in the water tank.

[0027] Furthermore, when the water tank is removed from the main body, the water tank does not act on the on / off switch, which disconnects the liquid level detection sensor from the control circuit board, rendering the liquid level detection sensor inoperative. By triggering the on / off switch with the water tank, the second end of the connecting pipe is sealed after the water tank is removed, preventing water from flowing out of the main body. Furthermore, the liquid level detection sensor ceases operation after the water tank is removed, preventing erroneous detection by the liquid level detection sensor and ensuring normal coffee brewing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings herein illustrate specific examples of the technical solutions described in the present invention, and together with the specific implementation methods constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0029] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0030] Figure 1 is a schematic diagram of an automatic coffee brewing machine according to an embodiment of the present invention;

[0031] Figure 2 is a cross-sectional view of an automatic coffee brewing machine according to one embodiment of the present invention;

[0032] 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 ;

[0033] 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 ;

[0034] Figure 5 In one embodiment of the present invention Figure 3 A magnified view of point A;

[0035] Figure 6 In one embodiment of the present invention Figure 4 Enlarged view of point B;

[0036] Figure 7This is an enlarged schematic diagram of the first sealing assembly and the connecting seat in one embodiment of the present invention;

[0037] Figure 8 is a schematic diagram of the liquid level in a water tank according to one embodiment of the present invention;

[0038] Description of reference numerals:

[0039] 100. Coffee machine; 1. Main body; 11. Connecting seat; 12. On / off switch; 13. First sealing assembly; 131. First sealing plug; 1311. First through groove; 1312. Abutting portion; 1313. Docking portion; 132. First elastic member; 133. Sealing ring; 134. Support member; 1341. Limiting block; 1342. First supporting ring; 135. First supporting seat; 1351. First connecting ring; 1352. Second connecting ring; 1353. Water inlet; 14. Connecting pipe; 15. Liquid level detection sensor; 16. Coffee basket; 17. Housing; 2. Water tank; 20. Second sealing assembly; 21. Chamber; 22. Second sealing plug; 23. Second supporting seat; 231. Second supporting ring; 232. Support plate; 233. Connecting groove. DETAILED DESCRIPTION

[0040] To facilitate understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0041] Unless otherwise specified or defined, the "first, second..." used in this article is only used to distinguish names and does not represent a specific quantity or order.

[0042] Unless stated otherwise or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] It should be noted that when an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there can be an intermediate element; when an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element; when an element is considered to be "mounted on" another element, it can be directly mounted on the other element or there can be an intermediate element. When an element is considered to be "located on" another element, it can be directly located on the other element or there can be an intermediate element.

[0044] The present invention provides an automatic coffee brewing machine 100, such as Figures 1 to 7As shown, it includes a main body 1, a water tank 2, a switch key 12, and a connecting pipe 14. The main body 1 has a control circuit board and a liquid level detection sensor 15. The water tank 2 is detachably connected to the main body 1. The connecting pipe 14 is installed in the main body 1. The liquid level detection sensor 15 is arranged 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 of the connecting pipe 14 and the liquid level in the water tank 2 are located on the same plane; the control circuit board has at least a first brewing gear and a second brewing gear, the first liquid level corresponds to the first brewing gear, and the second liquid level corresponds to the second brewing gear. The liquid level detection sensor 15 is used to detect the liquid level state of the connecting pipe 14; the water tank 2 cooperates with the switch key 12, the switch key 12 is electrically connected to the liquid level detection sensor 15, and the liquid level detection sensor 15 is electrically connected to the control circuit board.

[0045] Specifically, when the water tank 2 is installed on the main body 1, the inner wall of the water tank 2 touches the switch key 12 on the main body 1, and the switch key 12 sends an electrical signal to start 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 arranged close to the first end of the connecting pipe 14, the second end of the connecting pipe 14 is connected to the water tank 2, and the liquid level of the connecting pipe 14 and the liquid level in the water tank 2 are located 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, thereby judging the water capacity in the water tank 2.

[0046] Furthermore, when the water tank 2 is removed from the main body 1, the water tank 2 does not act on the switch 12, which disconnects the liquid level detection sensor 15 from the control circuit board, rendering the liquid level detection sensor 15 in an inoperative state. By triggering the switch 12 through the water tank 2, the second end of the connecting pipe 14 is sealed after the water tank 2 is removed, preventing water in the connecting pipe 14 from flowing out of the main body 1. Furthermore, the liquid level detection sensor 15 ceases operation after the water tank 2 is removed, preventing erroneous detection by the liquid level detection sensor 15 and ensuring normal coffee brewing.

[0047] Furthermore, the water tank 2 has at least a first liquid level and a second liquid level. The first liquid level corresponds to the first brewing level, and the second liquid level corresponds to the second brewing level. 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 level to complete the brewing operation. The first brewing level 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 level to complete the brewing operation. The second brewing level can brew ten cups of coffee. It should be noted that there is a significant difference in the amount of coffee brewed at the first brewing level and the second brewing level. Therefore, the liquid level detection sensor 15 can quantitatively brew the amount of coffee by detecting the capacity of the water tank 2.

[0048] In some embodiments, the main body 1 includes a housing 17 and a connecting base 11. The connecting base 11 is mounted on one side of the housing 17. The connecting pipe 14 is U-shaped. The first end of the connecting pipe 14 is disposed within the housing 17, and the second end of the connecting pipe 14 is disposed on the connecting base 11. The connecting base 11 has a first sealing assembly 13. The bottom of the water tank 2 has a second sealing assembly 20. The first sealing assembly 13 is located below the second sealing assembly 20, and the first sealing assembly 13 cooperates with the second sealing assembly 20. Specifically, the housing 17 is used to house a coffee basket 16 for holding coffee grounds to be brewed. The bottom of the water tank 2 is connected to the coffee basket 16 in the housing 17 via the connecting pipe 14. When the water tank 2 is removed, the first sealing assembly 13 is used to seal the water inlet 1353 on the connecting base 11 to prevent water from the connecting pipe 14 from overflowing from the connecting base 11. Furthermore, when the water tank 2 is removed, the second sealing assembly 20 also seals the water outlet of the water tank 2 to prevent water from overflowing from the water tank 2. The water tank 2 is vertically mounted on the connecting seat 11 . Under the interaction of the first sealing assembly 13 and the second sealing assembly 20 , the water tank 2 is communicated with the connecting pipe 14 .

[0049] Preferably, the first sealing assembly 13 includes a first sealing plug 131, a first elastic member 132, and a first support seat 135, the first end of the first support seat 135 is installed on the second end of the connecting pipe 14 and communicates with the connecting pipe 14, and the second end of the first support seat 135 is installed on the connecting seat 11; the first support seat 135 has a water inlet 1353, the first end of the first sealing plug 131 is installed in the water inlet 1353 and abuts against the first support seat 135; the first elastic member 132 is sleeved on the outside of the first sealing plug 131, and the two ends of the first elastic member 132 respectively abut against the second end of the first sealing plug 131 and the first support seat 135; the first sealing plug 131 has a first through groove 1311, and the first sealing plug 131 has a first moving position and a second moving position. In the first moving position, the first through groove 1311 is communicated with the water inlet 1353; in the second moving position, the first through groove 1311 is disconnected from the water inlet 1353.

[0050] Specifically, the first support seat 135 is sleeved over the connecting pipe 14, and the water inlet 1353 on the first support seat 135 is in communication with the connecting pipe 14. The first sealing plug 131 is disposed at the water inlet 1353. The first elastic member 132 is sleeved over the first sealing plug 131, and the two ends of the first elastic member 132 respectively abut against the second end of the first sealing plug 131 and the first support seat 135. When the second sealing assembly 20 of the water tank 2 presses the first sealing plug 131, the first sealing plug 131 moves to the first moving position, and the first through groove 1311 communicates with the water inlet 1353, thereby opening the connecting pipe 14. The first elastic member 132 is squeezed by the first sealing plug 131, and is in a compressed state and has a certain reverse force; when the second sealing assembly 20 is removed from the first sealing plug 131, the first sealing plug 131 moves to the second moving position, and the first sealing plug 131 is abutted against the inner wall of the water inlet 1353, so that the first through groove 1311 is disconnected from the water inlet 1353, thereby realizing a sealed connection pipe 14.

[0051] Furthermore, during operation, it is only necessary to 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 to open the second end of the connecting pipe 14. The operation is convenient and quick.

[0052] Preferably, the first sealing plug 131 has an abutting portion 1312 and a docking 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 docking portion 1313 is used to abut against the second sealing plug 22 and limit the second sealing plug 22 to improve the stability of the second sealing plug 22 when abutting against the first sealing plug 131.

[0053] Preferably, the first sealing assembly 13 further includes a sealing ring 133, which is sleeved on the outside of the first sealing plug 131. When the first sealing plug 131 is in the second movable position, the sealing ring 133 abuts the inner wall of the first support seat 135, thereby closing the water inlet 1353. Specifically, the sealing ring 133 is sleeved on the outside of the first sealing plug 131. The sealing ring 133 has a certain degree of elasticity. When the first sealing plug 131 is in the second movable position, the outer wall of the sealing ring 133 abuts the inner wall of the first support seat 135, thereby improving the sealing performance of the first sealing plug 131 in sealing the water inlet 1353.

[0054] Preferably, the first sealing assembly 13 also has a support member 134, the support member 134 includes a limit 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, the first support ring 1342 is sleeved on the outside of the second connecting ring 1352, and the limit 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, the second connecting ring 1352 is used to support the first support ring 1342 to improve the stability of the first support ring 1342 on the connecting seat 11, and 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 limit block 1341. By pressing the water tank 2, the second sealing assembly 20 squeezes the first sealing plug 131, realizes the movement of the first sealing plug 131, and opens the water inlet 1353 of the first sealing assembly 13.

[0055] In some embodiments, the second sealing assembly 20 includes a second sealing plug 22, a second support seat 23, and a second elastic member (not shown). The second support seat 23 has a water outlet, and the second sealing plug 22 is installed at the water outlet. The first end of the second sealing plug 22 abuts against the second support seat 23. The second elastic member is sleeved outside the second sealing plug 22, and the two ends of the second elastic member respectively abut against the second end of the second sealing plug 22 and the second support seat 23. Specifically, when the second sealing assembly 20 of the water tank 2 is aligned with the first sealing assembly 13, the second support seat 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, thereby opening the water inlet 1353, and achieving communication between the first through groove 1311 and the water inlet 1353. When the first sealing plug 131 is unable to move downward, the first sealing plug 131 is further squeezed. The reaction force generated by the first sealing plug 131 pushes the second sealing plug 22 to move. As the second sealing plug 22 moves, it compresses the second elastic member, causing the second elastic member to generate a reaction force. The second support seat 23 continues to move, causing the second support seat 23 to engage with the limit block 1341. The limit block 1341 limits the second support seat 23, securing the second support seat 23 to the support member 134, thereby achieving the mating of the first sealing assembly 13 and the second sealing assembly 20.

[0056] Preferably, a connecting groove 233 is formed in the second support seat 23, and a second connecting groove is formed on the outer wall of the second sealing plug 22. The second sealing plug 22 has a first movable position and a second movable position. In the first movable position, the second connecting groove is connected to the water outlet, and the second connecting groove is connected to the first connecting groove 1311 through the connecting groove 233. In the second movable position, the second connecting groove is disconnected from the water outlet. Specifically, when the second support seat 23 is engaged with the stop block 1341, the second sealing plug 22 also moves to the first movable position and opens the water outlet, so that the second connecting groove is connected to the water outlet. Since the second connecting groove is connected to the first connecting groove 1311 through the connecting groove 233, when the water outlet and the water inlet 1353 are both opened, the water outlet, the second connecting groove, the connecting groove 233, the first connecting groove 1311, and the water inlet 1353 are connected in sequence, thereby 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 member 132, sealing the water inlet 1353; and the second sealing plug 22 moves to the second moving position due to the reaction force of the second elastic member, sealing the water outlet, further realizing the sealing of the water tank 2 and the connecting seat 11.

[0057] Preferably, the second support seat 23 includes a second support ring 231 and a support plate 232. The support plate 232 and the second support ring 231 are an integrated structure. The water outlet is provided on the support plate 232. The second support ring 231 is mounted on the connecting seat 11. The outer wall of the second support ring 231 has a slot, and the limit block 1341 at least partially cooperates with the slot. Specifically, the outer wall of the second support ring 231 has a slot, and the second support ring 231 cooperates with the limit block 1341 through the slot to achieve a detachable connection between the first sealing assembly 13 and the second sealing assembly 20. In this embodiment, the portion of the limit block 1341 that engages with the slot can be made of an elastic material, which facilitates applying a certain force to separate the limit block 1341 from the slot, thereby facilitating the removal of the water tank 2 from the connecting seat 11.

[0058] Preferably, the water tank 2 has a chamber 21 therein, the first end of the connecting pipe 14 is higher than the maximum liquid level in the chamber 21, and the second end of the connecting pipe 14 is connected to the external atmospheric pressure. Specifically, the first end of the connecting pipe 14 is higher than the maximum liquid level in the chamber 21, and changes in the state of the water tank 2 can always be reflected in the first end of the connecting pipe 14. Since both the water tank 2 and the connecting pipe 14 are connected to atmospheric pressure, the pressures are consistent. At this time, the liquid levels between the water tank 2 and the connecting pipe 14 are level. The liquid level in the water tank 2 can be determined 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 detection of the liquid level detection sensor 15 to fail. The liquid level detection sensor 15 is hidden within the housing 17 to form a concealed structure with an aesthetically pleasing appearance.

[0059] The present invention also provides a brewing method of the automatic coffee brewing machine 100, such as Figure 8 As shown, the following steps are included:

[0060] 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, and the water level of the water tank 2 is a variable liquid level C, and the variable liquid level C is variable;

[0061] The first liquid level B has a first brewing quantity T, and the second liquid level A has a second brewing quantity P, where the second brewing quantity P is a multiple of the first brewing quantity T;

[0062] The first brewing gear corresponds to the first brewing quantity T, the second brewing gear corresponds to the second brewing quantity P, and the second brewing gear is a multiple of the first brewing gear;

[0063] When the liquid level detection sensor 15 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 gear is started;

[0064] When the liquid level detection sensor 15 detects that the height of the variable liquid level C exceeds the second liquid level A, the first brewing gear or the second brewing gear is started;

[0065] When the liquid level detection sensor 15 detects that the height of the variable liquid level C is lower than the first liquid level B, the first brewing gear and the second brewing gear cannot be started.

[0066] Specifically, the water tank 2 is simply mounted on the main body 1, connected to the connecting pipe 14, and the switch 12 activates the liquid level sensor 15 to detect the liquid level in the water tank 2, thereby automatically detecting the liquid level in the water tank 2. By setting a first brewing position and a second brewing position corresponding to a first liquid level B and a second liquid level A, in the first brewing position, the first brewing quantity T is fixed, 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 machine 100 brews a fixed amount of coffee at different brewing positions. For example, if two cups of ground coffee 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 position is a multiple of the first brewing position, operating the second brewing position allows for multiple cups of coffee to be brewed in a fixed amount, avoiding excessive or insufficient water consumption and achieving fixed-quantity brewing of coffee powder. Since the second brewing quantity P is a multiple of the first brewing quantity T, it is only necessary to set the water amount of the first brewing quantity A to brew the coffee powder in a quantitative manner.

[0067] When the liquid level detection sensor 15 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 gear is started. The variable liquid level may still be between the first liquid level B and the second liquid level A. Therefore, the first brewing gear can be started again.

[0068] When the liquid level detection sensor 15 detects that the height of the variable liquid level C exceeds the second liquid level A, the first or second brewing gear is activated. Assuming that the first brewing gear brews one cup, after activating the first brewing gear, the height of the variable liquid level C may still exceed the second liquid level A. When the second brewing gear is activated, the second brewing gear is a multiple of the first brewing gear, so the second brewing gear may be two or three cups. Therefore, by simply adding the corresponding coffee powder and activating the second brewing gear, multiple cups of coffee can be brewed at once.

[0069] When the liquid level detection sensor 15 detects that the height of the variable liquid level C is lower than the first liquid level B, the first brewing gear and the second brewing gear cannot be activated, thereby preventing coffee from being brewed when there is insufficient water.

[0070] When quoting drawing descriptions, new features that appear are described; in order to avoid repeated quoting of drawings which would result in a less concise description, features that have been described clearly will not be quoted from the drawings one by one.

[0071] The purpose of the above embodiments is to exemplify and deduce the technical solution of the present invention, and to fully describe the technical solution, purpose and effect of the present invention. Its purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosed content of the present invention, and it does not limit the scope of protection of the present invention.

[0072] The above embodiments are not exhaustive and may include many other embodiments not listed above. Any replacements and improvements made without violating the concept of the present invention are within the scope of protection of the present invention.

Claims

1. Automatic coffee brewing machine, characterized in that, The device comprises a main body, a water tank, an on / off 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 in the main body. The liquid level detection sensor is arranged near a 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 located on the same plane. The control circuit board has at least a first brewing gear and a second brewing gear, the water tank has at least a first liquid level and a second liquid level, the first liquid level corresponds to the first brewing gear, and the second liquid level corresponds to the second brewing gear. The liquid level detection sensor is used to detect the liquid level status of the connecting pipe; the water tank cooperates with the switch key, the switch key 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 brewing machine according to claim 1, wherein: The main body includes an outer shell and a connecting seat, the connecting seat is installed on one side of the outer shell, the first end of the connecting pipe is arranged in the outer shell, and the second end of the connecting pipe is arranged on the connecting seat. The connecting seat has a first sealing assembly, and the bottom of the water tank has a second sealing assembly. The first sealing assembly is located below the second sealing assembly, and the first sealing assembly cooperates with the second sealing assembly.

3. The automatic coffee brewing machine according to claim 2, wherein: The first sealing assembly includes a first sealing plug, a first elastic member, and a first support seat, wherein the first end of the first support seat is mounted on the second end of the connecting pipe and communicates with the connecting pipe, and the second end of the first support seat is mounted on the connecting seat; The first support seat has a water inlet, and the first end of the first sealing plug is installed in the water inlet and abuts against the first support seat; the first elastic member is sleeved outside the first sealing plug, and the two ends of the first elastic member are respectively abutted against the second end of the first sealing plug and the first support seat; The first sealing plug has a first through groove, and the first sealing plug has a first moving position and a second moving position. In the first moving position, the first through groove is connected to the water inlet; in the second moving position, the first through groove is disconnected from the water inlet.

4. The automatic coffee brewing machine according to claim 3, wherein: The first sealing assembly further comprises a sealing ring, which is sleeved on the outside of the first sealing plug. When the first sealing plug is in the second moving position, the sealing ring abuts against the inner wall of the first support seat and closes the water inlet.

5. The automatic coffee brewing machine according to claim 3, wherein: The first sealing assembly also has a support member, which includes a limit block and a first support ring. The first support seat includes a first connecting ring and a second connecting ring. The first connecting ring is sleeved outside the connecting pipe. The first support ring is installed on the connecting seat. The first support ring is sleeved outside the second connecting ring. The limit block cooperates with the second sealing assembly.

6. The automatic coffee brewing machine according to claim 5, wherein: The second sealing assembly includes a second sealing plug, a second support seat, and a second elastic member. The second support seat has a water outlet. The second sealing plug is installed at the water outlet. The first end of the second sealing plug is against the second support seat. The second elastic member is sleeved on the outside of the second sealing plug, and the two ends of the second elastic member are respectively against the second end of the second sealing plug and the second support seat.

7. The automatic coffee brewing machine according to claim 6, wherein: The second support seat has a connecting groove, the outer wall of the second sealing plug has a second connecting groove, and the second sealing plug has a first moving position and a second moving position. In the first moving position, the second connecting groove is connected to the water outlet, and the second connecting groove is connected to the first connecting groove through the connecting groove; in the second moving position, the second connecting groove is disconnected from the water outlet.

8. The automatic coffee brewing machine according to claim 6, wherein: The second support seat includes a second support ring and a support plate. The support plate and the second support ring are an integrated structure. The water outlet is opened on the support plate. The second support ring is installed on the connecting seat. The outer wall of the second support ring has a slot. The limit block at least partially cooperates with the slot.

9. The automatic coffee brewing machine according to any one of claims 1 to 8, characterized in that: The water tank has a chamber therein, a first end of the connecting pipe is higher than the maximum liquid level of the chamber, and a second end of the connecting pipe is in communication with the external atmospheric pressure.

10. A brewing method for an automatic coffee machine, characterized in that: The following steps are involved: The water tank has a first liquid level and a second liquid level, the first liquid level and the second liquid level are fixed, the water level of the water tank is a variable liquid level, and the variable liquid level is a variable; The first liquid level has a first brewing quantity, the second liquid level has a second brewing quantity, and the second brewing quantity is a multiple of the first brewing quantity; The first brewing gear corresponds to the first brewing quantitative amount, the second brewing gear corresponds to the second brewing quantitative amount, and the second brewing gear is a multiple of the first brewing gear; When the liquid level detection sensor detects that the height of the variable liquid level exceeds the first liquid level and is lower than the second liquid level, the first brewing gear is started; When the liquid level detection sensor detects that the height of the variable liquid level exceeds the second liquid level, the first brewing gear or the second brewing gear is started; When the liquid level detection sensor detects that the height of the variable liquid level is lower than the first liquid level, the first brewing gear and the second brewing gear cannot be started.

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