Drip filter cup water injection control method and system and drip coffee machine

Abstract

The invention provides a drip filter cup water injection control method and system and a drip coffee maker, and relates to the technical field of coffee makers. Obtaining the coffee liquid weight, and determining the liquid outlet speed according to the coffee liquid weight and the extraction time; obtaining the filter cup liquid weight, and determining the filter cup liquid weight change rate according to the filter cup liquid weight; according to the liquid outlet speed and the water injection speed, a control signal is determined and sent to a water injection pump, and the control signal is used for controlling the water injection pump to adjust the water injection speed, so that the speed difference value between the water injection speed and the liquid outlet speed belongs to a preset difference value range; or, according to the filter cup liquid weight change rate, a control signal is determined and sent to the water injection pump, the control signal is used for controlling the water injection pump to adjust the water injection speed, so that the filter cup liquid weight change rate belongs to the preset change range, the water injection speed is dynamically and accurately controlled, and the problems of insufficient extraction or accumulated liquid overflow are effectively avoided; the extraction precision and the extraction effect are obviously improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coffee machines, in particular to a drip filter cup water injection control method and system and a drip coffee machine. BACKGROUND

[0002] According to the extraction method, the coffee machine includes a drip filter coffee machine, an espresso coffee machine and a capsule coffee machine. The drip filter coffee machine injects water into the filter cup through the water injection pump to filter the coffee powder in the filter cup to make coffee. During the drip filtering process, the grinding fineness of the coffee powder affects the filtering speed of the coffee. At this time, compared with the filtering speed of the coffee, if the water flow speed injected into the filter cup is too fast, the water level in the filter cup will rise to overflow, and if the water flow speed is too slow, the liquid pressure in the filter cup will be low, and the extraction effect will be unsatisfactory. Therefore, it becomes a technical problem to be solved to provide a drip filter cup water injection control method capable of accurately controlling the water injection flow speed. SUMMARY

[0003] Therefore, the purpose of the present application is to overcome the deficiencies in the prior art and provide a drip filter cup water injection control method, system and drip coffee machine. The present application provides the following technical solutions: In a first aspect, the present application provides a drip filter cup water injection control method, which comprises: obtaining a water injection speed, the water injection speed being the water flow speed of the water injection pump injected into the filter cup; obtaining a coffee liquid weight, determining an outflow speed according to the coffee liquid weight and an extraction time, the coffee liquid weight being the weight of the liquid filtered from the filter cup to the liquid receiving cup; obtaining a filter cup liquid weight, determining a filter cup liquid weight change rate according to the filter cup liquid weight, the filter cup liquid weight being the weight of the water contained in the filter cup; determining a control signal according to the outflow speed and the water injection speed, sending the control signal to the water injection pump, the control signal being used to control the water injection pump to adjust the water injection speed, so that the speed difference between the water injection speed and the outflow speed belongs to a preset difference range; Alternatively, determining the control signal according to the filter cup liquid weight change rate, sending the control signal to the water injection pump, the control signal being used to control the water injection pump to adjust the water injection speed, so that the filter cup liquid weight change rate belongs to a preset change range.

[0004] In an embodiment, the control signal includes an acceleration control signal or a deceleration control signal, and the determination of the control signal according to the outflow speed and the water injection speed includes: if the outflow speed is greater than the water injection speed, determining the control signal as the deceleration control signal; and if the outflow speed is less than the water injection speed, determining the control signal as the acceleration control signal.

[0005] In an embodiment, the control signal comprises an acceleration control signal or a deceleration control signal, and the control signal is determined according to the filter cup liquid weight change rate, comprising: if the filter cup liquid weight change rate is greater than zero, determining the control signal as the deceleration control signal; if the filter cup liquid weight change rate is less than zero, determining the control signal as the acceleration control signal.

[0006] In an embodiment, the filter cup liquid weight change rate is determined according to the filter cup liquid weight, comprising: deriving the filter cup liquid weight to obtain the filter cup liquid weight change rate.

[0007] In an embodiment, the method further comprises: determining an actual extraction amount according to the coffee liquid weight, the filter cup liquid weight, and a preset water absorption amount; and if the actual extraction amount is greater than or equal to a preset extraction amount, sending a stop signal to the water injection pump to control the water injection pump to stop injecting water into the filter cup.

[0008] In an embodiment, the method further comprises: determining the actual extraction amount according to the coffee liquid weight, the filter cup liquid weight, the preset water absorption amount, and a drip error value, the drip error value being determined according to the liquid outlet speed and a preset drip coefficient.

[0009] In an embodiment, the method further comprises: if the filter cup liquid weight is greater than or equal to a preset filter cup liquid weight, sending a stop signal to the water injection pump.

[0010] In a second aspect, the present application further provides a drip filter cup water injection control system, comprising: a first acquisition module configured to acquire a water injection speed, the water injection speed being a water flow speed of a water injection pump injecting water into a filter cup; a second acquisition module configured to acquire a coffee liquid weight, and determine a liquid outlet speed according to the coffee liquid weight and an extraction time, the coffee liquid weight being a weight of liquid filtered from the filter cup to a liquid receiving cup; a third acquisition module configured to acquire a filter cup weight, and determine a filter cup liquid weight change rate according to the filter cup weight, the filter cup weight being a weight of coffee powder and water accommodated in the filter cup; a master control module configured to determine a control signal according to the liquid outlet speed and the water injection speed, and send the control signal to the water injection pump, the control signal being used to control the water injection pump to adjust the water injection speed, so that a speed difference between the water injection speed and the liquid outlet speed belongs to a preset difference range; or, determine the control signal according to the filter cup liquid weight change rate, and send the control signal to the water injection pump, the control signal being used to control the water injection pump to adjust the water injection speed, so that the filter cup liquid weight change rate belongs to a preset change range.

[0011] In a third aspect, the present application provides a drip coffee machine, comprising: a water injection pump, a filter cup, a liquid receiving cup, and the water injection control system of the filter cup of the drip coffee machine according to the second aspect, wherein the system comprises: a first acquisition module, a second acquisition module, and a third acquisition module. The first acquisition module is arranged at a water outlet pipeline of the water injection pump, and the water injection pump injects water into the filter cup through the water outlet pipeline. The second acquisition module is arranged at an outer wall of the filter cup. The third acquisition module is arranged at a bottom of the liquid receiving cup.

[0012] In an embodiment, the first acquisition module comprises a flow meter, the second acquisition module comprises a first weight sensor, and the third acquisition module comprises a second weight sensor.

[0013] The drip filter cup water injection control method, system, and drip coffee machine provided by the embodiments of the present application can obtain a water injection speed, which is the water flow speed of the water injection pump injected into the filter cup; obtain a coffee liquid weight, which is the weight of the liquid filtered from the filter cup to the liquid receiving cup; determine an outlet liquid speed according to the coffee liquid weight and the extraction time; obtain a filter cup liquid weight, which is the weight of the water contained in the filter cup; determine a filter cup liquid weight change rate according to the filter cup liquid weight; determine a control signal according to the outlet liquid speed and the water injection speed, and send the control signal to the water injection pump, so that the water injection pump adjusts the water injection speed, so that the speed difference between the water injection speed and the outlet liquid speed belongs to a preset difference range; or determine the control signal according to the filter cup liquid weight change rate, and send the control signal to the water injection pump, so that the water injection pump adjusts the water injection speed, so that the filter cup liquid weight change rate belongs to a preset change range. The drip filter cup water injection control method, system, and drip coffee machine provided by the embodiments of the present application can realize dynamic and accurate control of the water injection speed, effectively avoid problems such as insufficient extraction or liquid overflow, and significantly improve the extraction precision and extraction effect.

[0014] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0016] Figure 1A flowchart of a drip filter cup water injection control method provided by an embodiment of the application is shown. Figure 2 A structural diagram of a drip filter coffee machine is shown. Figure 3 A structural diagram of a drip filter cup water injection control system provided by an embodiment of the application is shown.

[0017] Main element symbol description: 200 - drip filter coffee machine; 210 - water injection pump; 220 - filter cup; 230 - liquid receiving cup; 300 - drip filter cup water injection control system; 310 - first acquisition module; 320 - second acquisition module; 330 - third acquisition module; 340 - main control module. DETAILED DESCRIPTION

[0018] Embodiments of the application are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar elements or elements having the same or similar functions are denoted throughout with the same or similar reference numerals. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the application and cannot be understood as limiting the application.

[0019] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the application belongs. The terms used in the specification of the template herein are only for the purpose of describing specific embodiments and are not intended to limit the application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0021] Embodiment 1 An embodiment of the application provides a drip filter cup water injection control method, specifically, please refer to Figure 1 , the method comprises steps S110-S140.

[0022] Step S110, acquiring the water injection speed, the water injection speed being the water flow speed of the water injection pump 210 injected into the filter cup 220.

[0023] In this embodiment, please refer to Figure 2 , Figure 2A structural diagram of a drip coffee machine 200 is shown, which comprises a water injection pump 210, a filter cup 220 and a receiving cup 230. After the water injection pump 210 is started, water injection to the filter cup 220 is started. When the water injection speed is too fast, the water injection speed is controlled to be reduced, and when the water injection speed is too slow, the water injection speed is controlled to be increased. Specifically, whether the water injection speed is appropriate can be determined according to the following steps.

[0024] In step S120, the coffee liquid weight is obtained, and the liquid discharge speed is determined according to the coffee liquid weight and the extraction time. The coffee liquid weight is the weight of the liquid filtered from the filter cup 220 to the receiving cup 230.

[0025] In this embodiment, the coffee liquid weight flowing into the receiving cup 230 after being filtered from the filter cup 220 is monitored and recorded in real time, and the real-time liquid discharge speed is obtained by calculating the change amount of the coffee liquid weight per unit time.

[0026] In step S130, the filter cup liquid weight is obtained, and the filter cup liquid weight change rate is determined according to the filter cup liquid weight. The filter cup liquid weight is the weight of the water contained in the filter cup 220.

[0027] It can be understood that the water injection pump 210 is arranged above the filter cup 220 to inject water into the filter cup 220, and the receiving cup 230 is arranged below the filter cup 220 to collect the coffee liquid flowing out of the filter cup 220 after extraction. If the water injection speed and the liquid discharge speed are consistent, the filter cup liquid weight should be maintained within a preset change range, and preferably, the filter cup liquid weight change rate is zero. In this embodiment, whether the current water injection speed needs to be adjusted can be determined according to the filter cup liquid weight change rate.

[0028] In step S140, the control signal is determined according to the liquid discharge speed and the water injection speed, and the control signal is sent to the water injection pump 210. The control signal is used to control the water injection pump 210 to adjust the water injection speed, so that the speed difference between the water injection speed and the liquid discharge speed belongs to a preset difference range.

[0029] In this embodiment, the control signal comprises an acceleration control signal and a deceleration control signal. By comparing the water injection control speed and the liquid discharge speed, it is determined to send the acceleration control signal or the deceleration control signal to the water injection pump 210, so as to control the difference between the water injection speed and the liquid discharge speed to be stable within a preset difference range, to avoid the liquid in the filter cup 220 overflowing due to the water injection speed being too slow, and to prevent the extraction from being insufficient due to the water injection speed being too fast, thereby ensuring the contact state between the coffee powder and the water flow stable in each extraction process, and ensuring the consistency and controllability of the final coffee taste.

[0030] In an embodiment, the control signal comprises an acceleration control signal or a deceleration control signal, and the control signal is determined according to the liquid outflow speed and the water inflow speed, including: if the liquid outflow speed is greater than the water inflow speed, determining the control signal as the deceleration control signal; and if the liquid outflow speed is less than the water inflow speed, determining the control signal as the acceleration control signal.

[0031] It can be understood that when the liquid outflow speed from the filter cup 220 is greater than the water inflow speed of the water pump 210, it indicates that the liquid outflow speed in the filter cup 220 is greater than the liquid inflow speed, and the control signal is determined as the deceleration control signal. The deceleration control signal is sent to the water pump 210 to reduce the water inflow speed, so as to avoid the water inflow speed being too fast and causing insufficient extraction. Conversely, when the liquid outflow speed is less than the water inflow speed, it indicates that the liquid inflow speed in the filter cup 220 is greater than the liquid outflow speed, and the liquid in the filter cup 220 is prone to overflow. The control signal is determined as the acceleration control signal, and the acceleration control signal is sent to the water pump 210 to increase the water inflow speed to balance the liquid dynamics in the filter cup 220.

[0032] In step S150, the control signal is determined according to the filter cup liquid weight change rate, and the control signal is sent to the water pump 210. The control signal is used to control the water pump 210 to adjust the water inflow speed, so that the filter cup liquid weight change rate belongs to a preset change range.

[0033] It can be understood that in addition to comparing the water inflow speed with the liquid outflow speed to determine whether the control signal sent to the water pump 210 is the acceleration control signal or the deceleration control signal, the filter cup liquid weight change rate can also be used to monitor the dynamic change of the water amount in the filter cup 220, and then determine whether the control signal is the acceleration control signal or the deceleration control signal.

[0034] In the embodiment, when the filter cup liquid weight change rate exceeds the preset range, for example, the filter cup liquid weight change rate is + 3g / s, it indicates that the water inflow speed is much faster than the liquid outflow speed, and the water amount in the filter cup 220 will quickly accumulate. At this time, the deceleration control signal needs to be sent to the water pump 210 to reduce the water inflow speed. For another example, the filter cup liquid weight change rate is - 2g / s, which indicates that the liquid outflow speed is too fast, and the water amount in the filter cup 220 will decrease, resulting in that the coffee powder in the filter cup 220 cannot be fully extracted, which affects the taste of coffee. At this time, the acceleration control signal needs to be sent to the water pump 210 to control the increase of the water inflow speed.

[0035] In an embodiment, the control signal comprises an acceleration control signal or a deceleration control signal, and the control signal is determined according to the filter cup liquid weight change rate, comprising: if the filter cup liquid weight change rate is greater than zero, determining the control signal as the deceleration control signal; if the filter cup liquid weight change rate is less than zero, determining the control signal as the acceleration control signal.

[0036] In the embodiment, when the filter cup liquid weight change rate is greater than zero, it indicates that the water flow in the filter cup 220 is increasing per unit time, at this time, a deceleration control signal needs to be sent to the water injection pump 210 to control the water injection speed to decrease; on the contrary, if the filter cup liquid weight change rate is less than zero, it indicates that the water flow in the filter cup 220 is decreasing per unit time, at this time, an acceleration control signal needs to be sent to the water injection pump 210 to control the water injection speed to increase, so as to avoid affecting the extraction effect.

[0037] In an embodiment, the filter cup liquid weight change rate is determined according to the filter cup liquid weight, comprising: the filter cup 220 liquid weight is differentiated to obtain the filter cup 220 weight change rate.

[0038] It can be understood that by differentiating the filter cup 220 liquid weight, the instantaneous change speed of the filter cup 220 liquid weight with time can be determined, that is, the current filter cup 220 weight change rate.

[0039] In an embodiment, the method further comprises: determining an actual extraction amount according to the coffee liquid weight, the filter cup 220 liquid weight and a preset water absorption amount; and if the actual extraction amount is greater than or equal to a preset extraction amount, sending a stop signal to the water injection pump 210 to control the water injection pump 210 to stop injecting water into the filter cup 220.

[0040] In the embodiment, the coffee liquid weight refers to the weight of the coffee liquid filtered from the filter cup 220 to the liquid receiving cup 230, the filter cup liquid weight refers to the weight of the water still in the filter cup 220, specifically including the weight of the coffee liquid not filtered out and the weight of the water not released after being absorbed by the coffee powder, and the preset water absorption amount is a fixed water amount that the coffee powder will absorb in the extraction process, which is preset according to the type and amount of coffee powder, for example, 15 grams of coffee powder will usually absorb about 25 grams of water. The calculation logic of the three is: actual extraction amount = coffee liquid weight + filter cup liquid weight - preset water absorption amount. It can be understood that by eliminating the interference of the water absorbed by the coffee powder and not released, the total amount of liquid that actually participates in the extraction of flavor substances and can be collected is accurately counted.

[0041] Further, when the actual extraction amount reaches or exceeds the preset extraction amount, a stop signal is sent to the water injection pump 210 to control the water injection pump 210 to stop working and no longer inject new water flow into the filter cup 220, thereby terminating the extraction process, so that the actual extraction coffee amount strictly follows the preset standard, ensuring the taste of the coffee.

[0042] In an embodiment, the method further comprises: determining the actual extraction amount according to the coffee liquid weight, the filter cup liquid weight, the preset water absorption amount, and a dripping error value, the dripping error value being determined according to the liquid outlet speed and a preset dripping coefficient.

[0043] In the present embodiment, a dripping error value is further introduced to obtain a more accurate actual extraction amount. It can be understood that the actual extraction amount needs to consider not only the coffee liquid weight in the receiving cup 230, the filter cup liquid weight remaining in the filter cup 220, and the preset water absorption amount of the coffee powder, but also the weight of the liquid in the process of dripping from the filter cup 220 to the receiving cup 230 (which has not yet dripped into the receiving cup 230), i.e., the dripping error value.

[0044] The dripping error value is determined according to the liquid outlet speed and a preset dripping coefficient. When the liquid outlet speed is fast, the liquid may fall in the form of continuous water flow, and the error is small. When the speed is slow, the liquid drips in the form of discrete liquid drops, and there is a time difference between the liquid flowing out of the filter cup 220 and falling into the receiving cup 230, resulting in the liquid that has flowed out of the filter cup 220 but has not yet been weighed by the receiving cup 230 being missed, and the error value increases as the speed decreases.

[0045] Therefore, the complete actual extraction amount calculation formula can be refined as: actual extraction amount = coffee liquid weight + (filter cup liquid weight - preset water absorption amount) + dripping error value. By supplementing this dynamic error term, the weight statistical deviation caused by the delay of the in-flight dripping can be corrected, the final calculation result is closer to the real effective extraction amount, a more accurate judgment basis is provided for the stop control of the water injection pump 210, and the consistency of the extraction end point of each cup of coffee is further ensured. In addition, by introducing the dripping error value, it can be judged in advance whether the actual extraction amount reaches the preset extraction amount (judged in advance during the process of the liquid flowing out of the filter cup 220 but not yet weighed by the receiving cup 230), and if so, a stop signal is sent in advance.

[0046] In an embodiment, the method further comprises: if the filter cup liquid weight is greater than or equal to a preset filter cup liquid weight, sending a stop signal to the water injection pump 210.

[0047] In the embodiment, a preset filter cup 220 liquid weight threshold is set based on the safety shutdown mechanism of the filter cup liquid weight, and the value is determined according to the filter cup 220 capacity, coffee powder amount and anti-overflow safety margin. For example, the preset threshold of a 500ml filter cup 220 can be set as 400g, and 100g of safety space is reserved. During the extraction process, the filter cup liquid weight is monitored in real time, and the filter cup liquid weight is compared with the preset filter cup liquid weight. When it is detected that the filter cup liquid weight reaches or exceeds the preset threshold, it indicates that the water amount in the filter cup 220 has reached or approached the safety carrying upper limit. If the water injection continues, the liquid may overflow due to excessive amount. At this time, a shutdown signal should be sent to the water injection pump 210 to control the water injection pump 210 to stop water injection, so as to avoid liquid overflow.

[0048] The drip filter cup water injection control method provided by the embodiment of the application includes the following steps: obtaining a water injection speed, the water injection speed being a water flow speed of a water injection pump injecting water into a filter cup; obtaining a coffee liquid weight, determining an outflow speed according to the coffee liquid weight and an extraction time, the coffee liquid weight being a weight of liquid filtered from the filter cup to a liquid receiving cup; obtaining a filter cup liquid weight, determining a filter cup liquid weight change rate according to the filter cup liquid weight, the filter cup liquid weight being a weight of water contained in the filter cup; determining a control signal according to the outflow speed and the water injection speed, and sending the control signal to the water injection pump, the control signal being used to control the water injection pump to adjust the water injection speed, so that a speed difference between the water injection speed and the outflow speed belongs to a preset difference range; or determining the control signal according to the filter cup liquid weight change rate, and sending the control signal to the water injection pump, the control signal being used to control the water injection pump to adjust the water injection speed, so that the filter cup liquid weight change rate belongs to a preset change range. The drip filter cup water injection control method provided by the embodiment of the application can realize dynamic and accurate control of the water injection speed, effectively avoid problems such as insufficient extraction or liquid overflow, and significantly improve extraction accuracy and extraction effect.

[0049] Embodiment 2 In addition, referring to Figure 3 The embodiment of the application further provides a drip filter cup water injection control system 300, which includes: A first obtaining module 310 is configured to obtain a water injection speed, the water injection speed being a water flow speed of a water injection pump 210 injecting water into a filter cup 220; A second obtaining module 320 is configured to obtain a coffee liquid weight, determine an outflow speed according to the coffee liquid weight and an extraction time, and the coffee liquid weight being a weight of liquid filtered from the filter cup 220 to a liquid receiving cup 230; A third obtaining module 330 is configured to obtain a filter cup weight, determine a filter cup liquid weight change rate according to the filter cup weight, and the filter cup weight being a weight of coffee powder and water contained in the filter cup 220; The master module 340 is configured to determine a control signal according to the liquid outlet speed and the water injection speed, and send the control signal to the water injection pump 210, where the control signal is used to control the water injection pump 210 to adjust the water injection speed, so that the speed difference between the water injection speed and the liquid outlet speed belongs to a preset difference range. Alternatively, the control signal is determined according to the filter cup liquid weight change rate, and the control signal is sent to the water injection pump 210, where the control signal is used to control the water injection pump 210 to adjust the water injection speed, so that the filter cup liquid weight change rate belongs to a preset change range.

[0050] The drip filter cup water injection control system 300 provided by the embodiments of the present application can execute the drip filter cup water injection control method provided by the method embodiment 1, and details are not repeated here to avoid repetition.

[0051] The drip filter cup water injection control system provided by the embodiments of the present application realizes dynamic and accurate control of the water injection speed, effectively avoids problems such as insufficient extraction or overflow of accumulated liquid, and significantly improves the extraction precision and extraction effect.

[0052] Embodiment 3 In addition, the embodiments of the present application provide a drip coffee machine, which comprises: Figure 2 The water injection pump 210, the filter cup 220, the liquid receiving cup 230, and the drip filter cup water injection control system 300 shown in the embodiment 2, and the drip filter cup water injection control system 300 comprises a first acquisition module 310, a second acquisition module 320, and a third acquisition module 330. The first acquisition module 310 is arranged at a water outlet pipeline of the water injection pump 210, the water injection pump 210 injects water into the filter cup 220 through the water outlet pipeline; the second acquisition module 320 is arranged at an outer wall of the filter cup 220; and the third acquisition module 330 is arranged at a bottom of the liquid receiving cup 230.

[0053] In an embodiment, the first acquisition module 310 comprises a flow meter, the second acquisition module 320 comprises a first weight sensor, and the third acquisition module 330 comprises a second weight sensor.

[0054] In the embodiment, the flow meter is used to acquire the water injection flow rate, the first weight sensor is used to acquire the filter cup liquid weight, and the second weight sensor is used to acquire the coffee liquid weight.

[0055] The drip coffee machine provided by the embodiments of the present application can execute the drip filter cup water injection control method provided by the method embodiment 1, and details are not repeated here to avoid repetition.

[0056] In all of the examples shown and described herein, any specific values should be interpreted as merely exemplary and not limiting, and thus other examples of the example embodiments can have different values.

[0057] It should be noted that like reference numerals and letters refer to like items throughout the several views, and once an item is defined in one view, it is not necessary to further define and explain it in the subsequent views.

[0058] The above-described embodiments are merely illustrative of several embodiments of the present application and do not limit the scope of the present application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present application, and such modifications and improvements should be construed as falling within the scope of the present application.

Claims

1. A method for controlling water injection in a drip filter cup, characterized in that, The method includes: The water injection rate is obtained, which is the water flow rate injected into the filter cup by the water injection pump; The weight of the coffee liquid is obtained, and the dispensing rate is determined based on the weight of the coffee liquid and the extraction time. The weight of the coffee liquid is the weight of the liquid filtered from the filter cup to the receiving cup. Obtain the liquid weight in the filter cup, and determine the rate of change of the liquid weight in the filter cup based on the liquid weight in the filter cup, wherein the liquid weight in the filter cup is the weight of the water contained in the filter cup; Based on the liquid discharge rate and the water injection rate, a control signal is determined and sent to the water injection pump. The control signal is used to control the water injection pump to adjust the water injection rate so that the speed difference between the water injection rate and the liquid discharge rate is within a preset difference range. Alternatively, the control signal can be determined based on the change rate of liquid weight in the filter cup, and the control signal can be sent to the water injection pump. The control signal is used to control the water injection pump to adjust the water injection speed so that the change rate of liquid weight in the filter cup is within a preset range.

2. The drip filter cup water injection control method according to claim 1, characterized in that, The control signal includes an acceleration control signal or a deceleration control signal. Determining the control signal based on the liquid outlet speed and the water injection speed includes: If the liquid discharge rate is greater than the water injection rate, then the control signal is determined to be the deceleration control signal; If the liquid outlet speed is less than the water injection speed, then the control signal is determined to be the acceleration control signal.

3. The drip filter cup water injection control method according to claim 1, characterized in that, The control signal includes an acceleration control signal or a deceleration control signal, and determining the control signal based on the rate of change of liquid weight in the filter cup includes: If the rate of change of liquid weight in the filter cup is greater than zero, then the control signal is determined to be the deceleration control signal; If the rate of change of liquid weight in the filter cup is less than zero, then the control signal is determined to be the acceleration control signal.

4. The drip filter cup water injection control method according to claim 3, characterized in that, The step of determining the rate of change of filter cup liquid weight based on the liquid weight of the filter cup includes: The rate of change of liquid weight in the filter cup is obtained by differentiating the liquid weight in the filter cup.

5. The drip filter cup water injection control method according to claim 1, characterized in that, The method further includes: The actual extraction volume is determined based on the weight of the coffee liquid, the weight of the liquid in the filter cup, and the preset water absorption rate. If the actual extraction amount is greater than or equal to the preset extraction amount, a stop signal is sent to the water injection pump to control the water injection pump to stop injecting water into the filter cup.

6. The drip filter cup water injection control method according to claim 5, characterized in that, The method further includes: The actual extraction volume is determined based on the weight of the coffee liquid, the weight of the filter cup, the preset water absorption, and the dripping error value. The dripping error value is determined based on the liquid output speed and the preset dripping coefficient.

7. The drip filter cup water injection control method according to any one of claims 1-6, characterized in that, The method further includes: If the liquid weight in the filter cup is greater than or equal to the preset liquid weight in the filter cup, a stop signal is sent to the water injection pump.

8. A drip filter cup water injection control system, characterized in that, The system includes: The first acquisition module is used to acquire the water injection speed, which is the water flow rate injected into the filter cup by the water injection pump. The second acquisition module is used to acquire the weight of the coffee liquid and determine the dispensing speed based on the weight of the coffee liquid and the extraction time. The weight of the coffee liquid is the weight of the liquid filtered from the filter cup to the receiving cup. The third acquisition module is used to acquire the weight of the filter cup and determine the rate of change of liquid weight in the filter cup based on the weight of the filter cup, wherein the weight of the filter cup is the weight of coffee powder and water contained in the filter cup; The main control module is used to determine a control signal based on the liquid outlet speed and the water injection speed, and send the control signal to the water injection pump. The control signal is used to control the water injection pump to adjust the water injection speed so that the speed difference between the water injection speed and the liquid outlet speed is within a preset difference range. Alternatively, the control signal can be determined based on the change rate of liquid weight in the filter cup, and the control signal can be sent to the water injection pump. The control signal is used to control the water injection pump to adjust the water injection speed so that the change rate of liquid weight in the filter cup is within a preset range.

9. A drip coffee machine, characterized in that, include: The system comprises a water pump, a filter cup, a receiving cup, and a drip filter cup water injection control system as described in claim 8, wherein the system includes: a first acquisition module, a second acquisition module, and a third acquisition module; The first acquisition module is located at the outlet pipe of the water injection pump, and the water injection pump injects water into the filter cup through the outlet pipe; The second acquisition module is disposed on the outer wall of the filter cup; The third acquisition module is located at the bottom of the liquid receiving cup.

10. The drip coffee machine according to claim 9, characterized in that, The first acquisition module includes a flow meter, the second acquisition module includes a first weight sensor, and the third acquisition module includes a second weight sensor.

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