EP-4740802-A1 - FLOW RATE CONTROL APPARATUS AND METHOD FOR EXTRATCTION PRESSURE, ELECTRONIC DEVICE AND STORAGE MEDIUM

EP4740802A1EP 4740802 A1EP4740802 A1EP 4740802A1EP-4740802-A1

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.

Inventors

CHEN, YU
NG, Kwok Yui Lawrence

Assignees

Maxi (Beijing) International Brand Management Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20240703

Claims (10)

A flow rate control apparatus for an extraction pressure, characterized in that the control apparatus comprises 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 solenoid valve, an extraction pressure sensor and an extraction head; a first end of the first electromagnetic pump and a first end of the second electromagnetic pump are both connected to a first end of the flow meter; a second end of the flow meter is connected to the water tank; and a second end of the first electromagnetic pump and a second end of the second electromagnetic pump are both connected to a first end of the heating boiler module; 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 respectively connected to a first end of the first pinhole pressure relief valve module and a first end of the second pinhole pressure relief valve module; and a second end of the first pinhole pressure relief valve module and a second end of the second pinhole pressure relief valve module are both connected to the water tank; and a second end of the heating boiler module is connected to a first end of the extraction solenoid valve; a second end of the extraction solenoid valve is connected to the extraction head; the extraction pressure sensor is disposed between the extraction solenoid valve and the extraction head, and the extraction pressure sensor is configured to acquire a real-time pressure value of a powder portafilter during a coffee extraction.
The control apparatus according to claim 1, wherein the heating boiler module comprises a heating boiler and a boiler electronic pressure sensor; and a first end of the heating boiler serves as the first end of the heating boiler module, and the boiler electronic pressure sensor is disposed on a water outlet pipe of the heating boiler.
The control apparatus according to claim 1, wherein the first pinhole pressure relief valve module comprises a first pinhole pressure relief valve and a first one-way solenoid valve, and the second pinhole pressure relief valve module comprises a second pinhole pressure relief valve and a second one-way solenoid valve; and a first end of the first pinhole pressure relief valve is respectively connected to a first end of the second pinhole pressure relief valve, a second end of the first electromagnetic pump and a second end of the second electromagnetic pump; a second end of the first pinhole pressure relief valve is connected to a first end of the first one-way solenoid valve; a second end of the second pinhole pressure relief valve is connected to a first end of the second one-way solenoid valve; and a second end of the first one-way solenoid valve is respectively connected to a second end of the second one-way solenoid valve and the water tank.
The control apparatus according to claim 2, wherein the control apparatus further comprises a central processing unit and a control panel; and the central processing unit and the control panel are both electrically connected to the extraction pressure sensor and the boiler electronic pressure sensor.
The control apparatus according to claim 4, wherein a display screen and an input button are further provided on the control panel.
A flow rate control method for an extraction pressure, characterized in that the control method is applied to the flow rate control apparatus for the extraction pressure according to any one of claims 1-5, and the control method comprises: acquiring a coffee extraction pressure value input by a user on a control panel; determining, by a central processing unit, a constant pressure value corresponding to the coffee extraction pressure value based on the coffee extraction pressure value, and activating a pinhole pressure relief valve module corresponding to the constant pressure value; detecting whether an in-boiler pressure value collected by a boiler electronic pressure sensor is consistent with the coffee extraction pressure value after the pinhole pressure relief valve module is activated; and in response to the in-boiler pressure value collected by the boiler electronic pressure sensor being not consistent with the coffee extraction pressure value, operating the second electromagnetic pump to increase a flow rate in a water pipe and a heating boiler, and determining, by the central processing unit, the in-boiler pressure value in real time based on a boiler pressure sensor; when the in-boiler pressure value is consistent with the coffee extraction pressure value, storing and maintaining, by the central processing unit, an operating frequency of the second electromagnetic pump under a state of pressure consistency, and controlling an extraction solenoid valve to open for a coffee extraction.
The control method according to claim 6, wherein the constant pressure value is determined through following steps: when both a first pinhole pressure relief valve module and a second pinhole pressure relief valve module are closed, the constant pressure is a maximum pressure value corresponding to a 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 a pressure difference between the maximum pressure value and a pressure value discharged through a first pinhole pressure relief valve; when the first pinhole pressure relief valve module is closed and the second pinhole pressure relief valve module is open, the constant pressure value is a pressure difference between the maximum pressure value and a pressure value discharged through a second pinhole pressure relief valve; and when both the first pinhole pressure relief valve module and the second pinhole pressure relief valve module are open, the constant pressure value is a pressure difference between the maximum pressure value and a relief pressure.
The control method according to claim 6, wherein the control method further comprises: after acquiring an adaptive pressure extraction information input by a user on the control panel, performing an extraction at a maximum coffee extraction pressure value, and transmitting an extraction pressure value collected by the extraction pressure sensor and an in-boiler pressure value collected by the boiler electronic pressure sensor to the central processing unit by the flow rate control apparatus for the extraction pressure; and after controlling the pinhole pressure relief valve module to activate based on the in-boiler pressure value and the extraction pressure value, performing extraction on remaining coffee powder at a pressure value equal to both the in-boiler pressure value and the extraction pressure value by the central processing unit.
An electronic device, characterized by comprising: a processor, a memory, and a bus, wherein the memory stores a machine-readable instruction executable by the processor; when the electronic device operates, the processor communicates with the memory via the bus; and when the machine-readable instruction is executed by the processor, the steps of the flow rate control method for the extraction pressure according to any one of claims 6-8 are performed.
A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and the computer program, when executed by a processor, performs the steps of the flow rate control method for the extraction pressure according to any one of claims 6-8.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present invention claims priority to Chinese Patent Application No. 2023111553816 filed with the China National Intellectual Property Administration on September 08, 2023, and entitled "FLOW RATE CONTROL APPARATUS AND METHOD FOR EXTRACTION PRESSURE, ELECTRONIC DEVICE AND STORAGE MEDIUM", the contents of which are incorporated herein by reference in entirety. TECHNICAL FIELD The present invention relates to the technical field of coffee machines, and in particular, to a flow rate control apparatus and method for extraction pressure, an electronic device and a storage medium. BACKGROUND ART A good cup of coffee requires a proper extraction degree, so as to extract the desired substances without excessively or insufficiently extracting the undesired ones, thereby ensuring a well-balanced and delicious taste of the coffee. In the coffee extraction process, an elevation in pressure leads to a higher extraction degree, while a reduction in pressure results in a lower extraction degree. A great many variable-pressure extraction espresso coffee machines have appeared on the market, which mainly adopt rotary pumps or gear pumps to adjust the rotational speed of the pump body so as to change the flow speed and pressure. Variable pressure is also achieved by vibration pumps. However, pressure regulation with vibration pumps is mainly realized by adjusting the Hertz frequency of the pump body or interrupting the Hertz wave band, so as to alter the piston frequency and speed of the pump body, reduce the water volume and speed of the water supplied to the water pipe, and further change the internal pressure of the pipe. Nevertheless, such an adjustment of the flow speed and flow rate fails to ensure effective and stable extraction. Therefore, ensuring adequate flow speed and water flow rate for stable extraction has become a critical technical challenge. SUMMARY In view of this, the objective of the present invention is to provide a flow rate control apparatus and method for extraction pressure, an electronic device and a storage medium. In a first aspect, an optional embodiment of the present invention provides a flow rate control apparatus for extraction pressure, wherein the control apparatus includes 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 solenoid valve, an extraction pressure sensor and an extraction head. A first end of the first electromagnetic pump and a first end of the second electromagnetic pump are both connected to a first end of the flow meter, a second end of the flow meter is connected to the water tank, and a second end of the first electromagnetic pump and a second end of the second electromagnetic pump are both connected to a first end of the heating boiler module. 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 respectively connected to a first end of the first pinhole pressure relief valve module and a first end of the second pinhole pressure relief valve module, and a second end of the first pinhole pressure relief valve module and a second end of the second pinhole pressure relief valve module are both connected to the water tank. A second end of the heating boiler module is connected to a first end of the extraction solenoid valve, a second end of the extraction solenoid valve is connected to the extraction head; the extraction pressure sensor is disposed between the extraction solenoid valve and the extraction head, and the extraction pressure sensor is configured to acquire a real-time pressure value of the powder portafilter during coffee extraction. In a second aspect, another optional embodiment of the present invention further provides a flow rate control method for extraction pressure, wherein the control method includes: acquiring a coffee extraction pressure value input by a user on a control panel;determining, by a central processing unit, a constant pressure value corresponding to the coffee extraction pressure value based on the coffee extraction pressure value, and activating a pinhole pressure relief valve module corresponding to the constant pressure value;detecting whether an in-boiler pressure value collected by a boiler electronic pressure sensor is consistent with the coffee extraction pressure value after the pinhole pressure relief valve module is activated;if not, operating a second electromagnetic pump to increase the flow rate in the water pipe and the heating boiler, determining the in-boiler pressure value by the central processing unit in real time according to the boiler pressure sensor, wherein when the in-boiler pressure value is consistent with the coffee extraction pressure value, the central processing unit sto