CN111568188A

CN111568188A - Automatic powder pressing type coffee machine

Info

Publication number: CN111568188A
Application number: CN202010487435.9A
Authority: CN
Inventors: 丁向峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2020-08-25

Abstract

The invention provides an automatic powder pressing type coffee machine, which comprises a main machine body, wherein a brewing opening with a downward outlet is formed in the main machine body, and a coffee filter funnel can be loaded on the brewing opening; the brewing port is connected to the outlet of an electric control three-way valve through a brewing pipe, one inlet of the electric control three-way valve is connected with a hot water cavity in the main body through a water inlet pipe, and the other inlet of the electric control three-way valve is connected with air through an air inlet pipe; a booster pump and a pressure gauge are arranged in the brewing pipe; the electric control three-way valve, the booster pump and the pressure gauge are coupled to the control module together; when the pressure sensed by the pressure gauge is lower than the set pressure, the control module enables the electric control three-way valve to be communicated with the air inlet pipe and the brewing pipe and enables the booster pump to continuously work; and when the pressure intensity sensed by the pressure intensity meter is greater than the set pressure intensity, the control module enables the electric control three-way valve to be communicated with the water inlet pipe and the brewing pipe, and the booster pump is shut down before the brewing is started. The coffee machine can automatically press coffee powder to a standard compaction degree so as to improve the quality of finally produced coffee.

Description

Automatic powder pressing type coffee machine

Technical Field

The invention relates to the field of household appliances, in particular to a coffee machine.

Background

In the process of making coffee by the conventional coffee grinder, ground coffee powder is compacted in a coffee filter funnel and then is loaded at a water outlet of the coffee grinder to extract coffee juice. However, in the powder pressing process, the compactness requirement is very delicate, and the pressing of the powder is slightly tight or loose, which affects the taste of the coffee, such as sour or astringent; moreover, the compactness of the pressed powder is different for different coffee bean varieties. Therefore, it is difficult for the ordinary user to grasp the coffee pulverizing skill to obtain coffee with a good taste.

Disclosure of Invention

In view of the above problems, the present invention is directed to an automatic powder pressing coffee machine, which can automatically press coffee powder to a standard degree of compaction, so as to improve the quality of the final coffee.

The technical scheme adopted by the invention for solving the technical problems is as follows: the automatic powder pressing type coffee machine comprises a main machine body, wherein a brewing opening with a downward outlet is formed in the main machine body, and a coffee filter funnel can be loaded on the brewing opening; the brewing port is connected to an outlet of an electric control three-way valve through a brewing pipe, one inlet of the electric control three-way valve is connected with a hot water cavity in the main body through a water inlet pipe, and the other inlet of the electric control three-way valve is connected with air through an air inlet pipe; a booster pump and a pressure gauge are arranged in the brewing pipe; the electric control three-way valve, the booster pump and the pressure gauge are coupled to the control module together; when the pressure sensed by the pressure gauge is lower than the set pressure, the control module enables the electric control three-way valve to be communicated with the air inlet pipe and the brewing pipe and enables the booster pump to continuously work; and when the pressure intensity sensed by the pressure intensity meter is greater than the set pressure intensity, the control module enables the electric control three-way valve to be communicated with the water inlet pipe and the brewing pipe, and the booster pump is shut down before the brewing is started.

Preferably, a steam cavity is further arranged in the main body, and the air inlet end of the air inlet pipe is connected with the steam cavity. Furthermore, the middle part of the air inlet pipe is also connected with an air branch pipe, the air branch pipe is communicated with the outside, and a one-way valve pointing to the air inlet pipe from the outside is connected in series in the air branch pipe.

Preferably, after the booster pump is started, the power is gradually increased from small to large until the booster pump stops working.

The invention has the beneficial effects that: after the coffee filter funnel filled with coffee powder is loaded on the brewing opening, because the air pressure in the brewing pipe is low at the beginning and is basically equal to the atmospheric pressure, the electric control three-way valve enables the brewing pipe to be communicated with the air, the booster pump works continuously, the high-pressure air flow generated by the booster pump compacts the coffee powder in the coffee filter funnel, the air resistance is increased continuously along with the continuous improvement of the compactness of the coffee powder, so that the air pressure in the brewing pipe is increased continuously until the set pressure is reached, the compactness of the coffee powder reaches the standard degree at the moment, and then the electric control three-way valve switches the connecting channel of the brewing pipe, so that the high-quality primary coffee pulp can be extracted.

Drawings

FIG. 1 is a schematic view of a first embodiment of the present automatic powder coffee maker.

FIG. 2 is a schematic view of a second embodiment of the automatic powder coffee maker.

Detailed Description

The invention is further illustrated with reference to the following figures and examples:

the first embodiment is as follows:

in the first embodiment shown in fig. 1, the automatic powder-pressing coffee machine comprises a main body 1, wherein a brewing opening 10 with a downward outlet is formed on the main body, and a coffee filter funnel 2 can be loaded on the brewing opening 10; the brewing opening 10 is connected to the outlet of an electrically controlled three-way valve 3 through a brewing tube 11, one inlet of the electrically controlled three-way valve 3 is connected to the hot water cavity 4 in the main body through a water inlet tube 12, and the other inlet is connected to the air through an air inlet tube 13.

In addition, the main body 1 further includes a steam chamber 8, and steam generated when the hot water chamber 4 heats the steam chamber is output through an air injection pipe (not shown) to make milk foam during the process of making coffee. The system is a general structure, which is not the main point of the present invention, and therefore, the illustration is not specifically shown.

In the first embodiment, a booster pump 5 and a pressure gauge 6 are arranged in the soaking pipe 11; the electric control three-way valve 3, the booster pump 5 and the pressure gauge 6 are coupled to a control module (not shown in the figure, and can be composed of a simplest 51-type single chip microcomputer); when the pressure intensity sensed by the pressure intensity meter 6 is less than the set pressure intensity, the control module enables the electric control three-way valve 3 to be communicated with the air inlet pipe 13 and the brewing pipe 11, and enables the booster pump 5 to continuously work; and when the pressure intensity sensed by the pressure intensity meter 6 is greater than the set pressure intensity, the control module enables the electric control three-way valve 3 to be communicated with the water inlet pipe 12 and the brewing pipe 11, and the booster pump 5 is shut down before the brewing is started.

After the coffee filter funnel 2 filled with coffee powder is loaded on the brewing opening 10, because the air pressure in the brewing tube 11 is low at the beginning and is basically equal to the atmospheric pressure, the electric control three-way valve 3 enables the brewing tube 11 to be communicated with the air, the booster pump 5 works continuously, the high-pressure air flow generated by the booster pump 5 compacts the coffee powder in the coffee filter funnel 2, the air resistance is increased continuously along with the continuous improvement of the compactness of the coffee powder, so that the air pressure in the brewing tube 11 is increased continuously until the set pressure is reached, the compactness of the coffee powder reaches the standard degree at the moment, and then the electric control three-way valve 3 switches the connecting channel of the brewing tube 11, so that the high-quality primary coffee pulp can be extracted. After the booster pump 5 is started, the power is gradually increased from small to large until the booster pump 5 stops working; therefore, the coffee powder can be gradually pressurized until the standard compactness is achieved, and the possibility that the coffee powder directly exceeds the standard compactness by too hard force at a time is avoided.

Example two:

in the second embodiment shown in fig. 2, the difference from the first embodiment is that the inlet end of the inlet pipe 13 is connected with the steam cavity 8. The middle of the air inlet pipe 13 is also connected with an air branch pipe 14, the air branch pipe 14 is communicated with the outside, and a one-way valve pointing to the air inlet pipe 13 from the outside is connected in series in the air branch pipe 14.

According to the second embodiment, on one hand, the steam pressure of the steam cavity 8 can be used for directly pressurizing the coffee powder so as to reduce the workload of the booster pump 5; on the other hand, the hot steam can be utilized to make the coffee powder soft so as to promote the compaction effect and have the coffee pre-extraction effect; after the air branch pipe 14 is connected by side, external cold air and hot steam can be mixed to reduce the temperature of the hot steam, so that the steam with moderate temperature can be obtained, and the situation that the surface of the coffee powder is too hot before formal extraction to affect the taste can be prevented.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An automatic powder pressing type coffee machine comprises a main machine body (1), wherein a brewing opening (10) with a downward outlet is formed in the main machine body (1), and a coffee filter (2) can be loaded on the brewing opening (10); the method is characterized in that: the brewing port (10) is connected to an outlet of an electric control three-way valve (3) through a brewing pipe (11), one inlet of the electric control three-way valve (3) is connected with a hot water cavity (4) in the main body through a water inlet pipe (12), and the other inlet is connected with air through an air inlet pipe (13); a booster pump (5) and a pressure gauge (6) are arranged in the soaking pipe (11); the electric control three-way valve (3), the booster pump (5) and the pressure gauge (6) are coupled to the control module together; when the pressure intensity sensed by the pressure intensity meter (6) is smaller than the set pressure intensity, the control module enables the electric control three-way valve (3) to be communicated with the air inlet pipe (13) and the brewing pipe (11), and enables the booster pump (5) to continuously work; and when the pressure intensity sensed by the pressure intensity meter (6) is greater than the set pressure intensity, the control module enables the electric control three-way valve (3) to be communicated with the water inlet pipe (12) and the brewing pipe (11), and the booster pump (5) is shut down before brewing is started.

2. The automatic powder coffee maker of claim 1, wherein: still be equipped with steam chamber (8) in the host computer body (1), this steam chamber (8) is connected to the inlet end of intake pipe (13).

3. The automatic powder coffee maker of claim 2, wherein: the air inlet pipe (13) is also connected with an air branch pipe (14) in the middle, the air branch pipe (14) is communicated with the outside, and a one-way valve pointing to the air inlet pipe (13) from the outside is connected in the air branch pipe (14) in series.

4. An automatic powder coffee machine according to any one of claims 1 to 3, characterized in that: after the booster pump (5) is started, the power is gradually increased from small to large until the booster pump stops working.