Flow rate control apparatus and method for extratction pressure, electronic device and storage medium

Abstract

A flow rate control apparatus and method for extraction pressure, an electronic device and a storage medium. In the control apparatus, a first end of a first electromagnetic pump (110) and a first end of a second electromagnetic pump (120) are both connected to a first end of a flow meter (140), a second end of the flow meter (140) is connected to a water tank (130), and second ends of the first electromagnetic pump (110) and the second electromagnetic pump (120) are both connected to a first end of a heating boiler module (150); water delivery pipes between the second ends of the first electromagnetic pump (110) and second electromagnetic pump (120) and the first end of the heating boiler module (150) are respectively connected to a first end of a first pinhole pressure relief valve module (160) and a first end of a second pinhole pressure relief valve module (170), and a second end of the first pinhole pressure relief valve module (160) and a second end of the second pinhole pressure relief valve module (170) are both connected to the water tank (130); and a second end of the heating boiler module (150) is connected to a first end of an extraction solenoid valve (180), a second end of the extraction solenoid valve (180) is connected to an extraction head (10-10), and an extraction pressure sensor (190) is provided between the extraction solenoid valve (180) and the extraction head (10-10), thereby ensuring sufficient flow rate and water volume for effective and stable coffee extraction.

Description

Extraction pressure flow control device, method, electronic device and storage medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 2023111553816 filed with the State Intellectual Property Office of China on September 8, 2023, entitled “Control device, method, electronic device and storage medium for extraction pressure flow,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the technical field of coffee machines, and in particular to a control device, method, electronic device, and storage medium for extraction pressure and flow. Background Art

[0004] A good cup of coffee requires just the right amount of extraction, extracting the desired ingredients without over- or under-extracting unwanted substances, thus ensuring a balanced and delicious coffee taste. During the extraction process, increasing pressure improves extraction, while decreasing pressure reduces extraction. Many espresso machines on the market utilize variable-pressure extraction methods, primarily using rotary or wheel pumps to adjust the pump speed, thereby varying the flow rate and pressure. Some also utilize vibrating pumps for pressure variation. However, since vibrating pumps primarily vary the pump's Hertz frequency or cut off the Hertz band, thereby altering the pump's piston frequency and speed, reducing the amount and rate of water injected into the pipes and thus changing the pressure within the pipes, this change in flow rate and flow rate can no longer guarantee effective and stable extraction. Therefore, ensuring sufficient flow rate and water flow for stable extraction has become a technical challenge that cannot be underestimated.

[0005] Application Contents

[0006] In view of this, an object of the present disclosure is to provide an extraction pressure flow control device, method, electronic device and storage medium.

[0007] In a first aspect, an optional embodiment of the present disclosure provides an extraction pressure and flow control device, the control device comprising a first electromagnetic pump, a second electromagnetic pump, a water tank, a flow meter, a heating boiler module, a first pinhole pressure relief valve module, a second pinhole pressure relief valve module, an extraction electromagnetic valve, an extraction pressure sensor, and an extraction head; wherein,

[0008] The first end of the first electromagnetic pump and the first end of the second electromagnetic pump are both connected to the first end of the flow meter, the second end of the flow meter is connected to the water tank, and the second end of the first electromagnetic pump and the second end of the second electromagnetic pump are both connected to the first end of the heating boiler module;

[0009] The water delivery pipes between the second end of the first electromagnetic pump, the second end of the second electromagnetic pump and the first end of the heating boiler module are connected to the first end of the first needle hole pressure relief valve module and the first end of the second needle hole pressure relief valve module respectively, and the second end of the first needle hole pressure relief valve module and the second end of the second needle hole pressure relief valve module are both connected to the water tank;

[0010] The second end of the heating boiler module is connected to the first end of the extraction solenoid valve, the second end of the extraction solenoid valve is connected to the extraction head, and the extraction pressure sensor is arranged between the extraction solenoid valve and the extraction head. The extraction pressure sensor is used to obtain the real-time pressure value of the powder bottle during coffee extraction.

[0011] In a second aspect, another optional embodiment of the present disclosure further provides a method for controlling extraction pressure and flow rate, the control method comprising:

[0012] Get the coffee extraction pressure value entered by the user on the control panel;

[0013] The central processing unit determines a constant pressure value corresponding to the coffee extraction pressure value based on the coffee extraction pressure value, and opens the pinhole pressure relief valve module corresponding to the constant pressure value;

[0014] After the pinhole pressure relief valve module is opened, it is detected whether the furnace pressure value collected by the boiler electronic pressure sensor is consistent with the coffee extraction pressure value;

[0015] If not, the second electromagnetic pump operates to increase the flow in the water pipe and the heating boiler. The central processing unit determines the pressure value in the furnace in real time based on the boiler pressure sensor. When the pressure value in the furnace is consistent with the coffee extraction pressure value, the central processing unit stores and maintains the operating frequency of the second electromagnetic pump under the consistent pressure value state, and controls the extraction electromagnetic valve to open for coffee extraction.

[0016] In the third aspect, another optional embodiment of the present disclosure further provides an electronic device, comprising: a processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the storage medium communicate through the bus, and the processor executes the machine-readable instructions to perform the steps of the extraction pressure flow control method as described in the second aspect.

[0017] In a fourth aspect, another optional embodiment of the present disclosure further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the extraction pressure flow control method as described in the second aspect are executed.

[0018] The extraction pressure flow control device, method, electronic device and storage medium provided by the embodiments of the present disclosure include: the first end of the first electromagnetic pump and the first end of the second electromagnetic pump are both connected to the first end of the flow meter, the second end of the flow meter is connected to the water tank, and the second ends of the first electromagnetic pump and the second electromagnetic pump are both connected to the first end of the heating boiler module; the delivery water pipe between the second ends of the first electromagnetic pump and the second electromagnetic pump and the first end of the heating boiler module is respectively connected to the first end of the first needle hole pressure relief valve module and the first end of the second needle hole pressure relief valve module, and the second end of the first needle hole pressure relief valve module and the second end of the second needle hole pressure relief valve module are both connected to the water tank; the second end of the heating boiler module is connected to the first end of the extraction solenoid valve, and the second end of the extraction solenoid valve is connected to the extraction head, and an extraction pressure sensor is arranged between the extraction solenoid valve and the extraction head, thereby ensuring sufficient flow rate and water flow for effective and stable coffee extraction.

[0019] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0021] FIG1 is a schematic diagram of a structure of an extraction pressure and flow control device according to an optional embodiment of the present disclosure;

[0022] FIG2 is a second structural schematic diagram of an extraction pressure and flow control device provided by an optional embodiment of the present disclosure;

[0023] FIG3 is a schematic flow chart of a method for controlling extraction pressure and flow rate according to an optional embodiment of the present disclosure;

[0024] FIG4 is a schematic structural diagram of an electronic device provided by an optional embodiment of the present disclosure.

[0025] Icons: 100-extraction pressure flow control device; 110-first electromagnetic pump; 120-second electromagnetic pump; 130-water tank; 140-flow meter; 150-heating boiler module; 151-heating boiler; 152-boiler electronic pressure sensor; 160-first pinhole pressure relief valve module; 161-first pinhole pressure relief valve; 162-first one-way solenoid valve; 170-second pinhole pressure relief valve module; 171-second pinhole pressure relief valve; 172-second one-way solenoid valve; 180-extraction solenoid valve; 190-extraction pressure sensor; 10-10-extraction head; 10-20 central processing unit; 10-30 control panel; 400-electronic equipment; 410-processor; 420-memory; 430-bus. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. It should be understood that the drawings in the present disclosure are only for the purpose of illustration and description and are not used to limit the scope of protection of the present disclosure. In addition, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in the present disclosure illustrate the operations implemented according to some embodiments of the present disclosure. It should be understood that the operations of the flowchart can be implemented out of sequence, and steps that do not have a logical context relationship can be reversed in order or implemented simultaneously. In addition, those skilled in the art, guided by the contents of the present disclosure, can add one or more other operations to the flowchart, or remove one or more operations from the flowchart.

[0027] In addition, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The components of the embodiments of the present disclosure generally described and shown in the drawings herein can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is not intended to limit the scope of the disclosure claimed for protection, but merely represents selected embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present disclosure.

[0028] To enable those skilled in the art to utilize this disclosure, the following embodiments are provided in conjunction with the specific application scenario of "coffee extraction." Those skilled in the art will appreciate that the general principles defined herein can be applied to other embodiments and application scenarios without departing from the spirit and scope of this disclosure. First, the applicable application scenarios of this disclosure are introduced. This disclosure is applicable to the field of coffee machine technology.

[0029] Research has found that a good cup of coffee requires just the right extraction level, extracting the desired ingredients without over- or under-extracting unwanted substances, thus ensuring a balanced and delicious coffee taste. During the extraction process, increasing pressure improves extraction, while decreasing pressure reduces extraction. Many espresso machines on the market utilize variable-pressure extraction methods, primarily using rotary or wheel pumps to adjust the pump speed, thereby varying the flow rate and pressure. Some also utilize vibrating pumps for pressure variation. However, these methods primarily rely on changing the pump's Hertz frequency or cutting off the Hertz band, thereby altering the pump's piston frequency and speed. This reduces the amount and rate of water injected into the pipe, thereby changing the pressure within the pipe. However, this change in flow rate and flow rate can no longer guarantee effective and stable extraction. Therefore, ensuring sufficient flow rate and water flow for stable extraction has become a significant technical challenge.

[0030] Based on this, the embodiment of the present disclosure provides an extraction pressure flow control device, which realizes the use of two electromagnetic pumps to provide effective continuous output to ensure water flow and prevent the water flow from becoming unstable and affecting the extraction due to power changes caused by the pressure regulation of a single electromagnetic pump, thereby ensuring sufficient flow rate and water flow for effective and stable coffee extraction.

[0031] Please refer to Figure 1, which is a schematic diagram of the structure of an extraction pressure and flow control device 100 provided in accordance with an optional embodiment of the present disclosure. As shown in Figure 1, the extraction pressure and flow control device 100 provided in accordance with an optional embodiment of the present disclosure includes a first electromagnetic pump 110, a second electromagnetic pump 120, a water tank 130, a flow meter 140, a heating boiler module 150, a first pinhole pressure relief valve module 160, a second pinhole pressure relief valve module 170, an extraction solenoid valve 180, an extraction pressure sensor 190, and an extraction head 10-10.

[0032] Specifically, the first end of the first electromagnetic pump 110 and the first end of the second electromagnetic pump 120 are connected to the first end of the flow meter 140, the second end of the flow meter 140 is connected to the water tank 130, the second end of the first electromagnetic pump 110 and the second end of the second electromagnetic pump 120 are connected to the first end of the heating boiler module 150; the water delivery pipes between the second ends of the first electromagnetic pump 110 and the second ends of the second electromagnetic pump 120 and the first end of the heating boiler module 150 are respectively connected to the first end of the first pinhole pressure relief valve module 160 and the first end of the first pinhole pressure relief valve module 160. The first end of the second needle hole pressure relief valve module 170 is connected, and the second end of the first needle hole pressure relief valve module 160 and the second end of the second needle hole pressure relief valve module 170 are both connected to the water tank 130; the second end of the heating boiler module 150 is connected to the first end of the extraction solenoid valve 180, and the second end of the extraction solenoid valve 180 is connected to the extraction head 10-10. The extraction pressure sensor 190 is arranged between the extraction solenoid valve 180 and the extraction head 10-10, and the extraction pressure sensor 190 is used to obtain the real-time pressure value of the powder bottle during coffee extraction.

[0033] Here, the device includes two electromagnetic pumps with the same maximum pressure. The water inlets of the electromagnetic pumps are connected to the water tank 130, and the water outlets of the two electromagnetic pumps merge and enter the heating boiler module 150. The water pipe between the confluence of the two electromagnetic pump outlets and the heating boiler module 150 is connected to at least two sets of pinhole pressure relief valve modules with different pressures. The water outlet of the heating boiler module 150 is connected to the extraction solenoid valve 180, and then to the extraction head 10-10. An extraction electronic pressure sensor is installed between the extraction solenoid valve 180 and the extraction head 10-10 to sense the real-time pressure of the powder bottle during extraction.

[0034] Here, the two electromagnetic pumps are divided into a first electromagnetic pump 110 and a second electromagnetic pump. The two electromagnetic pumps can work independently or simultaneously, or one electromagnetic pump can work at full frequency and the other electromagnetic pump can work at variable frequency. The pressure and flow in the water pipe and boiler can be provided as four constant pressure values ​​based on the first electromagnetic pump and the two pinhole pressure relief valve modules.

[0035] Further, please refer to FIG2 , which is a second structural diagram of an extraction pressure flow control device 100 provided by an optional embodiment of the present disclosure. As shown in FIG2 , the heating boiler module 150 includes a heating boiler 151 and a boiler electronic pressure sensor 152; wherein,

[0036] The first end of the heating boiler 151 serves as the first end of the heating boiler module 150 , and the boiler electronic pressure sensor 152 is provided on the water outlet pipe of the heating boiler 151 .

[0037] Here, the extraction pressure sensor 190 mainly detects the passive tube pressure caused by the back pressure of the coffee powder, while the boiler electronic pressure sensor 152 detects the furnace pressure composed of the pump flow and pressure.

[0038] Further, as shown in Figure 2, the first needle hole pressure relief valve module 160 includes a first needle hole pressure relief valve 161 and a first one-way solenoid valve 162, and the second needle hole pressure relief valve module 170 includes a second needle hole pressure relief valve 171 and a second one-way solenoid valve 172; wherein, the first end of the first needle hole pressure relief valve 161 is respectively connected to the first end of the second needle hole pressure relief valve 171, the second end of the first electromagnetic pump 110 and the second end of the second electromagnetic pump 120, the second end of the first needle hole pressure relief valve 161 is connected to the first end of the first one-way solenoid valve 162, the second end of the second needle hole pressure relief valve 171 is connected to the first end of the second one-way solenoid valve 172, and the second end of the first one-way solenoid valve 162 is respectively connected to the second end of the second one-way solenoid valve 172 and the water tank 130.

[0039] Here, four constant pressure values ​​can be provided according to the two pinhole pressure relief valves. For example, the electromagnetic pump is 15 bar, the relief pressure of the first pinhole pressure relief valve 161 is 6 bar, and the relief pressure of the second pinhole pressure relief valve 171 is 9 bar. Under the condition of constant output of the water pump:

[0040] The first constant pressure value is: when the first one-way solenoid valve 162 and the second one-way solenoid valve 172 of the pipeline are closed, the constant pressure value from the extraction pipeline to the boiler is the maximum solenoid pump body pressure of 15 bar.

[0041] The second constant pressure value is: when the first one-way solenoid valve 162 of the pipeline is opened and the second one-way solenoid valve 172 is closed, the water with a pressure of 6 bar in the pipeline will flow out from the first pinhole pressure relief valve 161. According to Newton's constant force, when the maximum pressure of the electromagnetic pump is 15 bar, the pressure in the extraction pipeline and the boiler will be 15 bar-6 bar=9 bar. When the flow rate and flow velocity are the same, the pressure of 9 bar is a constant pressure in the extraction pipeline and the boiler, so the second constant pressure value is 9 bar.

[0042] The third constant pressure value is: when the first one-way solenoid valve in the pipeline is closed and the second one-way solenoid valve 172 is closed, the water with a pressure of 9 bar in the pipeline will flow out from the second needle hole pressure relief valve 171. According to Newton's constant force, when the maximum pressure of the electromagnetic pump is 15 bar, the pressure in the extraction pipeline and the boiler will be 15 bar-9 bar=6 bar. When the flow rate and flow velocity are the same, the pressure of 6 bar is a constant pressure in the extraction pipeline and the boiler, so the third constant pressure value is 6 bar.

[0043] The fourth constant pressure value is: when the first one-way solenoid valve and the second one-way solenoid valve 172 of the pipeline are both open, the pressure in the extraction pipeline and the boiler flows out from the first pinhole pressure relief valve 161 and the second pinhole pressure relief valve 171. When the two pinhole pressure relief valves release pressure at the same time, the relief pressure = the maximum relief pressure of the pressure relief valve + the relief pressure difference = 9 + (9-6) = 12 bar, that is, the pressure in the extraction pipeline and the boiler = 15 bar - 12 bar = 3 bar, so the fourth constant pressure value is 3 bar.

[0044] In a specific embodiment, when the solenoid valve of the pinhole pressure relief valve is fully closed, the maximum pressure and flow in the pipe are the maximum pressure and flow of the first electromagnetic pump because there is no pressure relief. When the first one-way solenoid valve 162 of the first pinhole pressure relief valve 161 is opened and when the second one-way solenoid valve 172 of the second pinhole pressure relief valve 171 is closed, part of the pressure and flow in the pipe will flow back to the water tank 130 through the first pinhole pressure relief valve 161, and a constant pressure of constant pressure 1 = maximum pressure of the pump body (pump pressure) - relief pressure (pressure relief 1) of the first pinhole pressure relief valve 161 is retained in the pipe. When the first one-way solenoid valve 162 of the first pinhole pressure relief valve 161 is closed and when the second one-way solenoid valve 172 of the second pinhole pressure relief valve 171 is opened, part of the pressure and flow in the pipe will flow back to the water tank 130 through the first pinhole pressure relief valve 161, and a constant pressure of constant pressure 1 = maximum pressure of the pump body (pump pressure) - relief pressure (pressure relief 1) of the first pinhole pressure relief valve 161 is retained in the pipe. 71 flows back to the water tank 130, while the constant pressure in the pipe is retained at constant pressure 2 = maximum pressure of the pump body (pump pressure) - pressure relief pressure (pressure relief 2) of the second needle hole pressure relief valve 171; when the first one-way solenoid valve 162 of the first needle hole pressure relief valve 161 and the second one-way solenoid valve 172 of the second needle hole pressure relief valve 171 are both opened, part of the pressure and flow in the pipe will flow back to the water tank 130 through the first and second needle hole pressure relief valves 171, and constant pressure 3 in the pipe = (pump pressure - pressure relief 1) - ((pump pressure - pressure relief 2). In this way, the order of constant pressure provided by the electromagnetic pump for the pipeline is maximum pressure of the electromagnetic pump > constant pressure 1 > constant pressure 2 > constant pressure 3, which effectively enables the vibration pump to provide effective and continuous output to ensure water flow and will not make the water flow unstable due to changes in working frequency caused by pressure regulation of a single electromagnetic pump.

[0045] Among them, when there are two pinhole pressure relief valves, the maximum total number of combinations of pressures in the pipeline and boiler is 3. When there are n pinhole pressure relief valves, the maximum total number of combinations of pressures in the pipeline and boiler is: the number of pressure relief combinations + the maximum pressure value of the pump.

[0046] Furthermore, as shown in FIG2 , the control device further includes a central processing unit 10-20 and a control panel 10-30. The central processing unit 10-20 and the control panel are both electrically connected to the extraction pressure sensor 190 and the boiler electronic pressure sensor 152. The control panel is also provided with a display screen and input buttons.

[0047] Here, a CPU and a control panel 10-30 are provided in the device, and the CPU and the control panel 10-30 are connected to the electrical components and sensors in the coffee machine. The control panel can provide the user with the desired pressure and voltage parameters to be set.

[0048] An optional embodiment of the present disclosure provides a control device for extraction pressure and flow, the control device comprising a first electromagnetic pump, a second electromagnetic pump, a water tank, a flow meter, a heating boiler module, a first pinhole pressure relief valve module, a second pinhole pressure relief valve module, an extraction electromagnetic valve, an extraction pressure sensor, and an extraction head; wherein the first end of the first electromagnetic pump and the first end of the second electromagnetic pump are both connected to the first end of the flow meter, the second end of the flow meter is connected to the water tank, and the second end of the first electromagnetic pump and the second end of the second electromagnetic pump are both connected to the first end of the heating boiler module; a water delivery pipe between the second end of the first electromagnetic pump and the second end of the second electromagnetic pump and the first end of the heating boiler module is respectively connected to the first end of the first pinhole pressure relief valve module and the first end of the second pinhole pressure relief valve module, and the second end of the first pinhole pressure relief valve module and the second end of the second pinhole pressure relief valve module are both connected to the water tank; the second end of the heating boiler module is connected to the first end of the extraction electromagnetic valve, and the second end of the extraction electromagnetic valve is connected to the extraction head; an extraction pressure sensor is disposed between the extraction electromagnetic valve and the extraction head, and is used to obtain a real-time pressure value of a powder bottle during coffee extraction. The extraction pressure and flow control device utilizes two electromagnetic pumps to provide effective and continuous output to ensure water flow and prevents the water flow from becoming unstable and affecting extraction due to power changes caused by the pressure regulation of a single electromagnetic pump, thereby ensuring sufficient flow rate and water flow for effective and stable coffee extraction.

[0049] Please refer to Figure 3, which is a schematic flow chart of a method for controlling extraction pressure and flow provided by an optional embodiment of the present disclosure. As shown in Figure 3, the control method provided by an optional embodiment of the present disclosure includes:

[0050] S301: Obtaining the coffee extraction pressure value input by the user on the control panel.

[0051] In this step, the coffee extraction pressure value input by the user on the control panel is obtained.

[0052] S302: The central processing unit determines a constant pressure value corresponding to the coffee extraction pressure value based on the coffee extraction pressure value, and opens the pinhole pressure relief valve module corresponding to the constant pressure value.

[0053] In this step, the central processing unit determines a constant pressure value corresponding to the coffee extraction pressure value according to the coffee extraction pressure value, and opens the pinhole pressure relief valve module corresponding to the constant pressure value to start the first electromagnetic pump to work.

[0054] Here, the constant pressure value is pre-calculated, and during extraction, the CPU calculates the closest constant pressure value based on the coffee extraction pressure value input by the user.

[0055] In an optional embodiment, the constant pressure value is determined by the following steps:

[0056] A: When the first pinhole pressure relief valve module and the second pinhole pressure relief valve module are both closed, the constant pressure is the maximum pressure value corresponding to the maximum target electromagnetic pump;

[0057] B: When the first pinhole pressure relief valve module is open and the second pinhole pressure relief valve module is closed, the constant pressure is the pressure difference between the maximum pressure value and the pressure value of the outflow of the first pinhole pressure relief valve;

[0058] C: when the first pinhole pressure relief valve module is closed and the second pinhole pressure relief valve module is opened, the constant pressure value is the pressure difference between the maximum pressure value and the pressure value of the outflow of the second pinhole pressure relief valve;

[0059] D: When the first needle hole pressure relief valve module and the second needle hole pressure relief valve module are both opened, the constant pressure value is the pressure difference between the maximum pressure value and the relief pressure.

[0060] Here, the method for determining the constant pressure value will not be further described in this section.

[0061] S303: After the pinhole pressure relief valve module is opened, it is detected whether the furnace pressure value collected by the boiler electronic pressure sensor is consistent with the coffee extraction pressure value.

[0062] In this step, after the pinhole pressure relief valve module is opened, it is detected whether the furnace pressure value collected by the boiler electronic pressure sensor is consistent with the coffee extraction pressure value.

[0063] S304: If not, the second electromagnetic pump operates to increase the flow in the water pipe and the heating boiler. The central processing unit determines the pressure value in the furnace in real time based on the boiler pressure sensor. When the pressure value in the furnace is consistent with the coffee extraction pressure value, the central processing unit stores and maintains the operating frequency of the second electromagnetic pump in the state of consistent pressure values, and controls the extraction electromagnetic valve to open for coffee extraction.

[0064] In this step, if there is a mismatch, the second electromagnetic pump activates to increase the flow rate in the water pipe and the heating boiler. The central processing unit (CPU) determines the furnace pressure value in real time from the boiler pressure sensor. When the furnace pressure value matches the coffee extraction pressure value, the CPU stores and maintains the operating frequency of the second electromagnetic pump under the pressure match and controls the extraction solenoid valve to open for coffee extraction. If they match, the second electromagnetic pump deactivates and remains in operation.

[0065] Here, the user can select different boiler pressures for extraction as needed. During extraction, the CPU calculates the closest constant pressure value based on the coffee extraction pressure value entered by the user, then opens the solenoid valve of the corresponding pinhole pressure relief valve, and the first solenoid pump begins to operate. Based on the boiler electronic pressure sensor and the coffee extraction pressure value selected by the user, if the boiler pressure value equals the coffee extraction pressure value, the second solenoid pump will stop operating and maintain its current operating state. If the boiler pressure value is not equal to the coffee extraction pressure value, the second solenoid pump will begin to operate at full frequency or variable frequency. When the second solenoid pump is operating, it will increase the flow rate in the pipe and boiler. When the flow rate increases, the pressure will also increase. When the CPU determines that the boiler pressure equals the coffee extraction pressure value, the CPU will record and store the current frequency of the second solenoid pump, open the extraction solenoid valve to start extraction, and the value recorded by the CPU will be recorded as the reference value for the next extraction. This adjustment method is a constant pressure variable pressure control method.

[0066] In another specific embodiment, when the user inputs a coffee extraction pressure value, a database is first searched to determine whether the coffee extraction pressure value exists. If so, the operating frequency of the second electromagnetic pump corresponding to the coffee extraction pressure value is determined, the operating frequency of the second electromagnetic pump is directly adjusted, and the extraction solenoid valve is controlled to open for coffee extraction, without the need to further determine the operating frequency of the second electromagnetic pump corresponding to the coffee extraction pressure value.

[0067] In an optional implementation manner, the control method further includes:

[0068] a: After obtaining the adaptive pressure extraction information input by the user on the control panel, the extraction pressure flow control device extracts at the maximum coffee extraction pressure value, and sends the extraction pressure value collected by the extraction pressure sensor and the furnace pressure value collected by the boiler electronic pressure sensor to the central processor.

[0069] Here, after obtaining the adaptive pressure extraction information input by the user on the control panel, the extraction pressure flow control device extracts at the maximum coffee extraction pressure value, and sends the extraction pressure value collected by the extraction pressure sensor and the furnace pressure value collected by the boiler electronic pressure sensor to the central processor.

[0070] Among them, the greater the boiler pressure, the greater the pressure in the pipeline. When the boiler pressure is less than the back pressure of the coffee powder, due to insufficient water during extraction, the water cannot effectively pass through the coffee powder at a normal extraction speed, causing the water to stay in the coffee powder for a longer time, resulting in over-extraction. Conversely, when the boiler pressure is greater than the back pressure of the coffee powder, the pressure during extraction causes the water to stay in the coffee powder for a shorter time, resulting in under-extraction of the coffee.

[0071] b: The central processing unit controls the pinhole pressure relief valve module to open based on the pressure value in the furnace and the extraction pressure value, so as to extract the remaining coffee powder based on the pressure value equal to the pressure value in the furnace and the extraction pressure value.

[0072] Here, the central processing unit controls the pinhole pressure relief valve module to open according to the pressure value in the furnace and the extraction pressure value, so that the remaining coffee powder is extracted according to the pressure value equal to the pressure value in the furnace and the extraction pressure value.

[0073] Among them, the user can select adaptive pressure extraction through the operation panel. When extraction begins, the machine will start extraction at the maximum pressure. The extraction pressure sensor and the boiler electronic pressure sensor will send the current pressure signal to the CPU. The CPU will compare the pressures. When the pressure of the extraction pressure sensor stabilizes; after two seconds, the CPU will adjust the pressure in the furnace obtained by the boiler electronic pressure sensor using the constant pressure variable pressure control method according to the pressure of the extraction pressure sensor so that the pressure value equals the extraction pressure value for the rest of the extraction.

[0074] An optional embodiment of the present disclosure provides a method for controlling extraction pressure and flow, the method comprising: obtaining a coffee extraction pressure value input by a user on a control panel; a central processing unit determining a constant pressure value corresponding to the coffee extraction pressure value based on the coffee extraction pressure value, and opening a pinhole pressure relief valve module corresponding to the constant pressure value; after the pinhole pressure relief valve module is opened, detecting whether a furnace pressure value acquired by a boiler electronic pressure sensor is consistent with the coffee extraction pressure value; if not, operating a second electromagnetic pump to increase flow in a water pipe and the heating boiler; the central processing unit determining the furnace pressure value in real time based on the boiler pressure sensor; when the furnace pressure value is consistent with the coffee extraction pressure value, the central processing unit storing and maintaining the operating frequency of the second electromagnetic pump under the consistent pressure value state, and controlling the extraction solenoid valve to open for coffee extraction. The extraction pressure and flow control device achieves effective and continuous output from two electromagnetic pumps to ensure water flow, and prevents water flow from becoming unstable and affecting extraction due to power changes caused by pressure regulation of a single electromagnetic pump, thereby ensuring sufficient flow rate and water flow for effective and stable coffee extraction.

[0075] Please refer to Figure 4 , which is a schematic diagram of the structure of an electronic device provided by an optional embodiment of the present disclosure. As shown in Figure 4 , the electronic device 400 includes a processor 410 , a memory 420 , and a bus 430 .

[0076] The memory 420 stores machine-readable instructions executable by the processor 410. When the electronic device 400 is running, the processor 410 communicates with the memory 420 through the bus 430. When the machine-readable instructions are executed by the processor 410, the steps of the extraction pressure flow control method in the method embodiment shown in Figure 3 above can be executed. The specific implementation method can be found in the method embodiment and will not be repeated here.

[0077] An optional embodiment of the present disclosure further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for controlling the extraction pressure flow rate in the method embodiment shown in FIG3 above can be executed. The specific implementation method can be found in the method embodiment and will not be repeated here.

[0078] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0079] In the several embodiments provided in the present disclosure, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0080] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0081] In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0082] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present disclosure, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present disclosure. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0083] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present disclosure, which are used to illustrate the technical solutions of the present disclosure, rather than to limit them. The scope of protection of the present disclosure is not limited thereto. Although the present disclosure has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-mentioned embodiments within the technical scope disclosed in the present disclosure, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A control device for extraction pressure and flow, the control device comprising a first electromagnetic pump, a second electromagnetic pump, a water tank, a flow meter, a heating boiler module, a first pinhole pressure relief valve module, a second pinhole pressure relief valve module, an extraction electromagnetic valve, an extraction pressure sensor and an extraction head; wherein, The first end of the first electromagnetic pump and the first end of the second electromagnetic pump are both connected to the first end of the flow meter, the second end of the flow meter is connected to the water tank, and the second end of the first electromagnetic pump and the second end of the second electromagnetic pump are both connected to the first end of the heating boiler module; The water delivery pipe between the second end of the first electromagnetic pump, the second end of the second electromagnetic pump and the first end of the heating boiler module is connected to the first end of the first needle hole pressure relief valve module and the first end of the second needle hole pressure relief valve module respectively, and the second end of the first needle hole pressure relief valve module and the second end of the second needle hole pressure relief valve module are both connected to the water tank; The second end of the heating boiler module is connected to the first end of the extraction solenoid valve, the second end of the extraction solenoid valve is connected to the extraction head, and the extraction pressure sensor is arranged between the extraction solenoid valve and the extraction head, and the extraction pressure sensor is used to obtain the real-time pressure value of the powder bottle during coffee extraction.

2. The control device according to claim 1, wherein: The heating boiler module includes a heating boiler and a boiler electronic pressure sensor; wherein, The first end of the heating boiler serves as the first end of the heating boiler module, and the boiler electronic pressure sensor is arranged on the water outlet pipe of the heating boiler.

3. The control device according to claim 1, wherein: The first needle hole pressure relief valve module includes a first needle hole pressure relief valve and a first one-way solenoid valve, and the second needle hole pressure relief valve module includes a second needle hole pressure relief valve and a second one-way solenoid valve; wherein, The first end of the first needle hole pressure relief valve is respectively connected to the first end of the second needle hole pressure relief valve, the second end of the first electromagnetic pump and the second end of the second electromagnetic pump, the second end of the first needle hole pressure relief valve is connected to the first end of the first one-way electromagnetic valve, the second end of the second needle hole pressure relief valve is connected to the first end of the second one-way electromagnetic valve, and the second end of the first one-way solenoid valve is respectively connected to the second end of the second one-way solenoid valve and the water tank.

4. The control device according to claim 2, wherein: The control device also includes a central processing unit and a control panel; wherein, The central processing unit and the control panel are both electrically connected to the extraction pressure sensor and the boiler electronic pressure sensor.

5. The control device according to claim 4, wherein: The control panel is also provided with a display screen and input buttons.

6. A method for controlling extraction pressure and flow, the method being applied to the extraction pressure and flow control device according to any one of claims 1 to 5, the method comprising: Get the coffee extraction pressure value entered by the user on the control panel; The central processing unit determines a constant pressure value corresponding to the coffee extraction pressure value based on the coffee extraction pressure value, and opens the pinhole pressure relief valve module corresponding to the constant pressure value; After the pinhole pressure relief valve module is opened, it is detected whether the furnace pressure value collected by the boiler electronic pressure sensor is consistent with the coffee extraction pressure value; If not, the second electromagnetic pump works to increase the flow in the water pipe and the heating boiler, and the central processor determines the pressure value in the furnace in real time according to the boiler pressure sensor. When the pressure value in the furnace is consistent with the coffee extraction pressure value, the central processor stores and maintains the operating frequency of the second electromagnetic pump in a state of consistent pressure values, and controls the extraction electromagnetic valve to open for coffee extraction.

7. The control method according to claim 6, wherein: The constant pressure value is determined by the following steps: When the first pinhole pressure relief valve module and the second pinhole pressure relief valve module are both closed, the constant pressure is the maximum pressure value corresponding to the maximum target electromagnetic pump; When the first pinhole pressure relief valve module is open and the second pinhole pressure relief valve module is closed, the constant pressure is the pressure difference between the maximum pressure value and the pressure value of the first pinhole pressure relief valve outflow; When the first pinhole pressure relief valve module is closed and the second pinhole pressure relief valve module is opened, the constant pressure value is the pressure difference between the maximum pressure value and the pressure value of the second pinhole pressure relief valve outflow; When the first needle hole pressure relief valve module and the second needle hole pressure relief valve module are both opened, the constant pressure value is the pressure difference between the maximum pressure value and the relief pressure.

8. The control method according to claim 6, wherein: The control method further comprises: After obtaining the adaptive pressure extraction information input by the user on the control panel, the extraction pressure flow control device extracts at the maximum coffee extraction pressure value, and sends the extraction pressure value collected by the extraction pressure sensor and the furnace pressure value collected by the boiler electronic pressure sensor to the central processor; The central processor controls the pinhole pressure relief valve module to open based on the pressure value in the furnace and the extraction pressure value, so that the remaining coffee powder is extracted based on a pressure value equal to the pressure value in the furnace and the extraction pressure value.

9. An electronic device, comprising: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor and the memory communicate through the bus. When the processor is running, the machine-readable instructions execute the steps of the extraction pressure flow control method as described in any one of claims 6 to 8.

10. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, executes the steps of the method for controlling the extraction pressure flow rate according to any one of claims 6 to 8.

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