CN109700320B - Coffee machine brewing system with changeable pressure - Google Patents
Coffee machine brewing system with changeable pressure Download PDFInfo
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- CN109700320B CN109700320B CN201910030333.1A CN201910030333A CN109700320B CN 109700320 B CN109700320 B CN 109700320B CN 201910030333 A CN201910030333 A CN 201910030333A CN 109700320 B CN109700320 B CN 109700320B
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Abstract
The invention discloses a coffee machine brewing system capable of changing pressure, which comprises a water pump, a one-way valve, an electromagnetic proportional valve, a three-way electromagnetic valve, a control device, a pressure setting device and a brewing branch circuit, wherein the input end of the water pump is communicated with a water source, the output end of the water pump is communicated with the one-way valve, the output end of the one-way valve is communicated with the electromagnetic proportional valve, the output end of the electromagnetic proportional valve is communicated with a water outlet, the brewing branch circuit comprises a pressure detection device, a heating device and a brewing device, the output end of the three-way electromagnetic valve is respectively communicated with the brewing device and the water outlet, the output end of the pressure setting device is connected with the control device, and the output end of the control device is respectively connected with the water pump, the electromagnetic proportional valve and the three-way electromagnetic valve. The coffee machine brewing system with the pressure changeable achieves the purposes of adjusting the pressure value of coffee brewing in real time and stabilizing the pressure on a set value.
Description
Technical Field
The invention relates to the technical field of coffee machines, in particular to a coffee machine brewing system with changeable pressure.
Background
When the coffee machine on the market is used for making coffee beverage, the pressure in the cavity of the brewing device is higher, the quantity and the thickness of coffee powder in the cavity are one of variables influencing the pressure, and the magnitude of the pressure is a key variable determining the quality of the coffee. The pressure required by brewing can be manually corrected only before making coffee beverage by the conventional coffee machine, and when the type of coffee beans used is changed or the thickness of coffee powder is changed, the pressure of the coffee machine during brewing cannot be adjusted in real time, so that the actual brewing pressure is influenced, and the quality of the extracted coffee is reduced.
When coffee beans of different origins are brewed, different multistage pressure curves are needed to extract the optimal flavor of the coffee beans. However, the brewing system of the coffee machine on the market can only realize the change between two or three pressures, or can realize the pressure change but cannot stably maintain the pressure change.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a coffee machine brewing system capable of changing pressure, which solves the problem that the coffee machine in the current market can not correct the pressure in real time, or can only realize the change between two or three pressures, or can realize the pressure change but can not stably maintain.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a coffee machine brewing system capable of changing pressure comprises a water pump, a one-way valve, an electromagnetic proportional valve, a three-way electromagnetic valve, a control device, a pressure setting device and a brewing branch circuit, wherein the input end of the water pump is communicated with a water source, the output end of the water pump is communicated with the one-way valve, the output end of the one-way valve is communicated with the electromagnetic proportional valve, the output end of the electromagnetic proportional valve is communicated with a water outlet, the three-way electromagnetic valve is communicated with the water outlet, the output end of the pressure setting device is connected with the control device, and the output end of the control device is respectively connected with the water pump, the electromagnetic proportional valve and the three-way electromagnetic valve;
the brewing branch comprises a pressure detection device, a heating device and a brewing device, wherein the input end of the pressure detection device is communicated with the one-way valve, the output end of the pressure detection device is communicated with the heating device, the output end of the heating device is communicated with the three-way electromagnetic valve, and the output end of the three-way electromagnetic valve is respectively communicated with the brewing device and the water outlet.
Preferably, the rotating speed of the motor of the water pump is continuously adjustable.
Preferably, the opening degree of the electromagnetic proportional valve can be continuously adjusted.
Preferably, the pressure setting device adopts manual and automatic pressure value adjustment.
(III) advantageous effects
The invention provides a coffee machine brewing system capable of changing pressure. The method has the following beneficial effects:
(1) the coffee machine brewing system with changeable pressure controls the operation of a water pump, the water pump supplies water from a water source to a brewing branch through a one-way valve, the opening of an electromagnetic proportional valve is controlled, a heating device of the brewing branch heats the entering water, the heated water flows into a brewing device, a pressure detection device monitors the water pressure in the brewing branch in real time and feeds the water pressure back to a control device, the control device compares the pressure fed back in real time with a pressure set value, the control quantity of the rotating speed of the water pump and the opening of the electromagnetic proportional valve is obtained through calculation, thereby realizing the accurate adjustment of the water pressure, the control device can realize the automatic pressure set value adjustment according to a set curve of the pressure and can also be used for receiving the signal of the pressure setting device to realize the manual pressure set value adjustment, and a user can realize the switching of two automatic and manual pressure set value adjustment modes through the control device, the pressure value of the coffee brewing is adjusted in real time, and the pressure is stabilized on the set value.
Drawings
FIG. 1 is a diagram of the brewing circuit of the coffee maker of the present invention;
FIG. 2 is a schematic structural diagram of a pressure curve according to the present invention.
In the figure: 1 water pump, 2 one-way valve, 3 electromagnetic proportional valve, 4 heating device, 5 three-way electromagnetic valve, 6 control device, 7 pressure detection device, 8 brewing device, 9 pressure setting device, 10 brewing branch, 11 water outlet and 12 water source.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a coffee machine brewing system capable of changing pressure comprises a water pump 1, a one-way valve 2, an electromagnetic proportional valve 3, a three-way electromagnetic valve 5, a control device 6, a pressure setting device 9 and a brewing branch 10, wherein the input end of the water pump 1 is communicated with a water source 12, the output end of the water pump 1 is communicated with the one-way valve 2, the output end of the one-way valve 2 is communicated with the electromagnetic proportional valve 3, the output end of the electromagnetic proportional valve 3 is communicated with a water outlet 11, the output end of the pressure setting device 9 is connected with the control device 6, and the output end of the control device 6 is respectively connected with the water pump 1, the electromagnetic proportional valve 3 and the three-way electromagnetic valve 5;
the brewing branch 10 comprises a pressure detection device 7, a heating device 4 and a brewing device 8, wherein the input end of the pressure detection device 7 is communicated with the one-way valve 2, the output end of the pressure detection device 7 is communicated with the heating device 4, the output end of the heating device 4 is communicated with the three-way electromagnetic valve 5, and the output end of the three-way electromagnetic valve 5 is respectively communicated with the water outlet 11 and the brewing device 8. The rotating speed of the motor of the water pump 1 is continuously adjustable. The opening degree of the electromagnetic proportional valve 3 can be continuously adjusted. The pressure setting device 9 adopts manual and automatic pressure value adjustment.
When the coffee brewing device is used, when a user starts to prepare coffee drinks, the user firstly turns on a power supply of the coffee machine, after the control device 6 is started, the user selects corresponding brewing pressure curves according to the quantity and quality of coffee to be brewed, each brewing curve defines a pressure set value at each moment in the brewing process, or the user can input the pressure set value in the brewing process in a manual mode; the specific manual mode can be realized by operating a keyboard, a button, a handle, a touch screen and the like connected with the control device 6; after the brewing program is started, the water pump 1 starts to work to supply cold water to the brewing branch 10, the water flows into the heating device 4 through the one-way valve 2 and is rapidly heated to the target temperature in the heating device 4, and the three-way electromagnetic valve 5 is opened at the same time, so that the water in the heating device 4 flows to the coffee powder at the outlet. The water can not flow back due to the action of the one-way valve 2, and the liquid can not pass through quickly due to the accumulation of the coffee powder at the outlet, so that the pressure in the system can be continuously increased. When the rotation speed of the water pump 1 is increased, the speed of pressure increase in the system is increased. And the electromagnetic proportional valve 3 is opened, a certain amount of water in the brewing branch 10 is discharged, so that the pressure is reduced. At the moment, the pressure detection device 7 arranged in the brewing branch 10 starts to detect a real-time pressure value and feeds the real-time pressure value back to the control device 6, the control device 6 calculates a pressure difference value according to a pressure set value at the current moment, and obtains a control output value through a control algorithm of the control device 6, wherein the control algorithm is preferably realized by a PID (proportion integration differentiation) control algorithm, wherein the control output value is represented by the rotating speed of the water pump, or the opening of the electromagnetic proportional valve, or the control of the rotating speed of the water pump and the opening of the electromagnetic proportional valve simultaneously; the total amount of water in the brewing system of the coffee machine is adjusted through the closed-loop control of the pressure, so that the pressure of the brewing branch 10 is adjusted in real time and the pressure value is stabilized on a set value.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A pressure-modifiable brewing system for a coffee machine, comprising:
water pump (1), check valve (2), electromagnetism proportional valve (3), three-way solenoid valve (5), controlling means (6), pressure setting means (9) and dash bubble branch road (10), its characterized in that: the input end of the water pump (1) is communicated with a water source (12), the output end of the water pump (1) is communicated with the one-way valve (2), the output end of the one-way valve (2) is communicated with the electromagnetic proportional valve (3), the output end communicated with the electromagnetic proportional valve (3) is communicated with the water outlet (11), the output end of the pressure setting device (9) is connected with the control device (6), and the output end of the control device (6) is respectively connected with the water pump (1), the electromagnetic proportional valve (3) and the three-way electromagnetic valve (5);
the brewing branch (10) comprises a pressure detection device (7), a heating device (4) and a brewing device (8), the input end of the pressure detection device (7) is communicated with the one-way valve (2), the output end of the pressure detection device (7) is communicated with the heating device (4), the output end of the heating device (4) is communicated with the three-way electromagnetic valve (5), and the output end of the three-way electromagnetic valve (5) is respectively communicated with the brewing device (8) and the water outlet (11);
the rotating speed of a motor of the water pump (1) is continuously adjustable;
the opening degree of the electromagnetic proportional valve (3) can be continuously adjusted;
the pressure setting device (9) adopts manual and automatic pressure value adjustment, wherein,
the power supply of the coffee machine is turned on, after the control device (6) is started, a user selects a corresponding brewing pressure curve on the pressure setting device (9) according to the quantity and quality of coffee to be brewed, each brewing curve defines a pressure set value at each moment in the brewing process, or the user inputs the pressure set value in the brewing process on the pressure setting device (9) in a manual mode; after the brewing program is started, the water pump (1) starts to work, cold water is supplied to the brewing branch (10), water flows into the heating device (4) through the one-way valve (2), the water is rapidly heated in the heating device (4) to the target temperature, meanwhile, the three-way electromagnetic valve (5) is opened, so that the water in the heating device (4) flows to the coffee powder at the outlet of the brewing device (8), the water cannot flow backwards due to the action of the one-way valve (2), the liquid in the brewing device (8) cannot rapidly pass through due to the accumulation of the coffee powder at the outlet of the brewing device (8), the pressure in the brewing system of the coffee machine with the changeable pressure is continuously increased at the moment, the rotating speed of the water pump (1) is increased, the increasing speed of the pressure in the brewing system of the coffee machine with the changeable pressure is increased, the electromagnetic proportional valve (3) is opened, and a certain amount of the water in the brewing branch (10) is discharged, therefore, the pressure is reduced, at the moment, a pressure detection device (7) arranged in the brewing branch (10) starts to detect a real-time pressure value and feeds the real-time pressure value back to the control device (6), the control device (6) calculates a pressure difference value according to a pressure set value at the current moment, and a control output quantity is obtained through a control algorithm of the control device (6), wherein the control output quantity is embodied as the rotating speed of the water pump (1), or the opening degree of the electromagnetic proportional valve (3), or the control on the rotating speed and the opening degree of the electromagnetic proportional valve simultaneously; the total amount of water in the coffee machine brewing system with the changeable pressure is adjusted through closed-loop control of the pressure, so that the pressure of the brewing branch (10) is adjusted in real time, and the pressure value is stabilized on the set pressure value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910030333.1A CN109700320B (en) | 2019-01-14 | 2019-01-14 | Coffee machine brewing system with changeable pressure |
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| CN201910030333.1A CN109700320B (en) | 2019-01-14 | 2019-01-14 | Coffee machine brewing system with changeable pressure |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112905143A (en) * | 2021-02-04 | 2021-06-04 | 苏州鑫通包装有限公司 | Extraction pressure display system and method for coffee machine |
| CN113598611A (en) * | 2021-08-19 | 2021-11-05 | 广东顺德科锐玛电器有限公司 | Water outlet control device of coffee machine |
| CN115067753B (en) * | 2022-06-02 | 2023-06-23 | 广东顺德科锐玛电器有限公司 | Electronic transformer structure of coffee machine |
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| CN102038430B (en) * | 2009-10-23 | 2015-02-18 | 格鲁普西姆贝利有限公司 | A coffee machine with dispensing pressure regulation and a method relating thereto |
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