阅读说明：本技术 可自动清洗的咖啡机奶路系统及其工作方法 (Coffee machine milk path system capable of being automatically cleaned and working method thereof ) 是由 沈磊 崔超超 周洋 于 2019-09-23 设计创作，主要内容包括：本发明公开了一种可自动清洗的咖啡机奶路系统,它包括水路、奶路、气路及混合加热装置,水路上设有相连通的储水罐及水泵；奶路上设有气液混合泵、储奶罐及与之连接的三通单向阀；气路上设有气量限制装置及气路截止阀,气量限制装置一端与大气连通,一端则和气路截止阀连接,气路截止阀通过管路与三通单向阀一起连接到气液混合泵上；气液混合泵的出口与混合加热装置连接；一种可自动清洗的咖啡机奶路的工作方法,包括使用可自动清洗的咖啡机奶路系统,分为清洗阶段及制奶阶段两阶段。本发明得到的可自动清洗的咖啡机奶路系统及其工作方法,简化了咖啡机奶路的整体结构,且奶路在一般清洗过程中无需外接水源,方便了咖啡机的使用。(The invention discloses a coffee machine milk path system capable of being automatically cleaned, which comprises a water path, a milk path, a gas path and a mixed heating device, wherein the water path is provided with a water storage tank and a water pump which are communicated; the milk path is provided with a gas-liquid mixing pump, a milk storage tank and a three-way one-way valve connected with the milk storage tank; the gas path is provided with a gas flow limiting device and a gas path stop valve, one end of the gas flow limiting device is communicated with the atmosphere, the other end of the gas flow limiting device is connected with the gas path stop valve, and the gas path stop valve and a three-way check valve are connected to a gas-liquid mixing pump together through a pipeline; the outlet of the gas-liquid mixing pump is connected with the mixing and heating device; a working method of a coffee machine milk path capable of being automatically cleaned comprises the step of using a coffee machine milk path system capable of being automatically cleaned, and the coffee machine milk path system comprises a cleaning stage and a milk making stage. The coffee machine milk path system capable of being automatically cleaned and the working method thereof simplify the overall structure of the coffee machine milk path, and the milk path does not need to be externally connected with a water source in the general cleaning process, so that the coffee machine is convenient to use.)

1. A coffee machine milk path system capable of being automatically cleaned comprises a water path (1), a milk path (2), a gas path (3) and a mixing and heating device (4), and is characterized in that a water storage tank (10) and a water pump (11) are arranged on the water path (1), and the water inlet of the water pump (11) is communicated with the water storage tank (10) through a pipeline; the milk way (2) is provided with a gas-liquid mixing pump (20), a milk storage tank (21) and a three-way one-way valve (22), the one-way inlet end of the three-way one-way valve (22) is communicated with the milk storage tank (21), the other two ends of the three-way one-way valve are respectively communicated with the water pump (11) and the gas-liquid mixing pump (20), namely, the water way (1) is connected with the milk way (2) through the three-way one-way valve (22); the gas circuit (3) is provided with a gas quantity limiting device (30) and a gas circuit stop valve (31), the gas quantity limiting device (30) mainly comprises a shell (300) and a limiting sheet (301), the limiting sheet (301) is provided with a small hole with the diameter d, d is more than or equal to 0.08mm and less than or equal to 0.2mm, and the limiting sheet (301) is fixed on the shell (300); one end of the gas quantity limiting device (30) is communicated with the atmosphere, the other end of the gas quantity limiting device is connected with a gas circuit stop valve (31), and the gas circuit stop valve (31) is connected to the gas-liquid mixing pump (20) together with a three-way one-way valve (22) through a pipeline; the outlet of the gas-liquid mixing pump (20) is connected with the mixing and heating device (4), and the outlet end of the mixing and heating device (4) is communicated with the outside.

2. The milk path system of the coffee machine capable of automatically cleaning as claimed in claim 1, wherein a water path stop valve (12) is provided between the three-way check valve (22) and the water pump (11).

3. The self-cleaning coffee machine milk path system according to claim 1 or 2, characterized in that a frothing device (5) is connected to the outlet of the mixing and heating device (4).

4. The milk path system of the coffee machine capable of being automatically cleaned according to claim 1 or 2, characterized in that a two-position three-way valve (6) is arranged at the outlet of the mixing and heating device (4), the outlet A of the two-position three-way valve (6) is communicated with the waste liquid barrel (7), and the outlet B is communicated with the outside.

5. The milk path system of a coffee machine capable of being automatically cleaned according to claim 3, characterized in that a two-position three-way valve (6) is arranged between the mixing and heating device (4) and the frothing device (5), wherein an outlet A of the two-position three-way valve (6) is communicated with the waste liquid barrel (7), and an outlet B is communicated with the frothing device (5).

6. The milk path system of the coffee machine capable of automatically cleaning according to claim 1 or 2, wherein the one-way inlet end of the three-way check valve (22) is communicated with the milk storage tank (21) to detachably connect the three-way check valve (22) with the milk storage tank (21), the three-way check valve (22) comprises a valve housing (220) and a duckbilled rubber valve core (221), the valve housing (220) is provided with a liquid inlet hole (222) and two connecting holes (223) respectively communicated with the water path (1) and the milk path (2), the liquid inlet hole (222) is used as the one-way inlet end of the three-way check valve (22), and the duckbilled rubber valve core (221) is arranged at a three-branch position where the liquid inlet hole (222) is connected with the two connecting holes (223) and faces the two duckbilled connecting holes (223).

7. A working method of a milk path of a coffee machine capable of being automatically cleaned is characterized by comprising a milk path system of the coffee machine capable of being automatically cleaned, which is divided into a cleaning stage and a milk making stage, wherein the cleaning stage and the milk making stage are mutually circulated, and the working method specifically comprises the following steps:

s1, when the milk machine is used for the first time or after a period of time, a power supply is switched on, the water pump (11) and the gas-liquid mixing pump (20) work, water flows along the water storage tank (10), the water pump (11), the three-way one-way valve (22), the gas-liquid mixing pump (20), the mixing and heating device (4) and the two-position three-way valve (6) to clean the interior of the milk channel (2), in the process, two channels of the two-position three-way valve (6) are opened in turn, and the cleaning of the two-position three-way valve (6) and the foaming device (5) and the discharge of waste liquid after cleaning are completed;

s2, after cleaning is finished, stopping working of the water pump (11), enabling the gas-liquid mixing pump (20) to still continue working, opening the three-way check valve (22), enabling the milk storage tank (21) to be communicated with the gas-liquid mixing pump (20), enabling milk to enter the milk path (2), opening the gas path stop valve (31), enabling quantitative air to enter the milk path (2) along the gas amount limiting device (30) and the gas path stop valve (31) under the action of the gas-liquid mixing pump (20), enabling the air to enter the gas-liquid mixing pump (20) after being mixed with the milk, enabling the air to be pumped to the mixing and heating device (4) by the gas-liquid mixing pump (20) after being mixed with the milk, and enabling the air and the milk mixture to continue flowing out to the two-position three-;

s3, at this time, because the gas-milk mixture may contain the cleaned waste liquid in the step S1, the outlet A of the two-position three-way valve (6) is conducted, the gas-milk mixture and the cleaned waste liquid are discharged to the waste liquid barrel (7) for a period of time, and the three-phase mixture of gas, milk and water is discharged completely;

s4, adjusting the two-position three-way valve (6) to close the outlet A and conduct the outlet B, and forming milk foam to flow into a container of a user after the mixture flows into the foaming device (5);

after the step S4 is completed, the milk path system of the self-cleaning coffee machine is kept in a temporary stop state, and when the user reuses the coffee machine within a predetermined time, the steps S2 and S4 are repeated to complete the production of milk foam, and when the user reuses the coffee machine after exceeding a predetermined time limit, the system repeats the processes of the steps S1 to S4.

8. The method of claim 7, wherein the step S1 further comprises the steps of:

and S5, switching on the power supply of the mixing and heating device (4), heating the inflowing water, and then washing the two-position three-way valve (6) and the foaming device (5) with hot water.

9. The method of operating a milk circuit of a self-cleaning coffee machine as claimed in claim 7 or 8, further comprising the steps of:

s6, turning off the gas-liquid mixing pump (20), emptying the milk storage tank (21), and cleaning the milk storage tank (21);

s7, taking out the three-way check valve (22), immersing the three-way check valve into water, restarting the gas-liquid mixing pump (20) and the water pump (11), closing the gas circuit stop valve (31), sucking water into the water channel (1) and the milk channel (2) from the water storage tank (10) and the three-way check valve (22), continuously pumping water into the mixing and heating device (4) by the gas-liquid mixing pump (20), and then flowing out to the two-position three-way valve (6);

and S8, opening and closing an outlet A and an outlet B of the two-position three-way valve (6) in turn, cleaning the foaming device (5) and discharging waste liquid.

Technical Field

The invention relates to an internal pipeline system of a coffee machine, in particular to a milk channel system of the coffee machine capable of being automatically cleaned and a working method thereof.

Background

The coffee machine is a machine for making coffee, and mainly plays a role in mixing and outputting substances such as water, coffee powder, milk, air and the like under a certain condition.

The milk way self-cleaning equipment of the existing coffee machine usually needs an external water tank and adopts steam for cleaning, so that the pipeline structure is complex, the power consumption is large, the cleaning is inconvenient, the air inlet structure of the air inlet pipeline is complex, and the manufacturing and the control are difficult.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provide an automatic cleaning milk channel system of a coffee machine and a working method thereof, wherein the milk channel system has a simple structure, is convenient to clean and has simple air inlet control.

In order to achieve the purpose, the milk path system of the coffee machine capable of being automatically cleaned comprises a water path, a milk path, a gas path and a mixed heating device, wherein a water storage tank and a water pump are arranged on the water path, and the water inlet of the water pump is communicated with the water storage tank through a pipeline; the milk path is provided with a gas-liquid mixing pump, a milk storage tank and a three-way one-way valve, the one-way inlet end of the three-way one-way valve is communicated with the milk storage tank, the other two ends of the three-way one-way valve are respectively communicated with the water pump and the gas-liquid mixing pump, namely the water path is connected with the milk path through the three-way one-way valve; the gas path is provided with a gas flow limiting device and a gas path stop valve, the gas flow limiting device mainly comprises a shell and a limiting sheet, the limiting sheet is provided with a small hole with the diameter d, d is more than or equal to 0.08mm and less than or equal to 0.2mm, and the limiting sheet is fixed on the shell; one end of the air flow limiting device is communicated with the atmosphere, and the other end of the air flow limiting device is connected with an air path stop valve which is connected with the air-liquid mixing pump together with a three-way one-way valve through a pipeline; the outlet of the gas-liquid mixing pump is connected with the mixing and heating device, and the outlet end of the mixing and heating device is communicated with the outside.

In order to avoid the milk from flowing back into the water pump in the working process, a waterway stop valve is arranged between the three-way one-way valve and the water pump.

In order to enable the milk path system to output milk bubbles with large foam quantity, a foaming device is connected with the outlet of the mixing and heating device.

In order to facilitate the discharge of the waste liquid after cleaning and avoid a user from receiving the waste liquid, the outlet of the mixing and heating device is connected with a two-position three-way valve, the outlet A of the two-position three-way valve is communicated with the waste liquid barrel, and the outlet B of the two-position three-way valve is communicated with the outside; when the mixing and heating device is connected with the foaming device, the two-position three-way valve is arranged between the mixing and heating device and the foaming device, and the outlet B is communicated with the foaming device.

In order to facilitate cleaning and reduce the weight and cost of the three-way one-way valve, the one-way inlet end of the three-way one-way valve (22) is communicated with the milk storage tank (21) in a manner that the three-way one-way valve (22) is detachably connected with the milk storage tank (21), the three-way one-way valve (22) comprises a valve shell (220) and a duckbilled rubber valve core (221), a liquid inlet hole (222) and two connecting holes (223) which are respectively communicated with the water channel (1) and the milk channel (2) are formed in the valve shell (220), the liquid inlet hole (222) is used as the one-way inlet end of the three-way one-way valve (22), the duckbilled rubber valve core is arranged at a three-fork position where the liquid inlet hole.

A working method of a milk path of a coffee machine capable of being automatically cleaned comprises the following steps of using the milk path system of the coffee machine capable of being automatically cleaned, dividing the milk path system into a cleaning stage and a milk making stage which are mutually circulated, and specifically comprising the following steps:

s1, when the milk machine is used for the first time or after a period of time, the power supply is switched on, the water pump and the gas-liquid mixing pump work, water flows along the water storage tank, the water pump, the three-way one-way valve, the gas-liquid mixing pump and the mixing and heating device to clean the interior of the milk path, and in the process, two paths of the two-position three-way valve are opened in turn to finish cleaning of the two-position three-way valve and the foaming device and discharge of waste liquid after cleaning;

s2, after cleaning, the water pump stops working, the water path stop valve is closed, the gas-liquid mixing pump continues working, at this time, because the water path is closed, the three-way check valve is opened, the milk storage tank is communicated with the gas-liquid mixing pump, milk enters the milk path, the gas path stop valve is opened at the same time, quantitative air enters the milk path along the air flow limiting device and the gas path stop valve under the action of the gas-liquid mixing pump, and enters the gas-liquid mixing pump after being mixed with the milk, the air is pumped to the mixing and heating device by the gas-liquid mixing pump after being mixed with the milk, and the gas-milk mixture continues flowing out to the two-position three-way;

s3, at this time, because the gas-milk mixture may contain the cleaned waste liquid in the step S1, the outlet A of the two-position three-way valve is communicated, the gas-milk mixture and the cleaned waste liquid are discharged to a waste liquid barrel, and the process lasts for a period of time, so that the three-phase mixture of the gas, the milk and the water is discharged completely;

s4, adjusting the two-position three-way valve to close the outlet A and conduct the outlet B, and enabling the mixture to flow into a container of a user after flowing into the foaming device to form milk foam;

after the step S4 is completed, the milk path system of the self-cleaning coffee machine is kept in a temporary stop state, when the user reuses the coffee machine within a specified time, the steps S2 and S4 are repeated to complete the making of milk foam, and when the user reuses the coffee machine after exceeding a specified time limit, the system repeats the processes of the steps S1-S4.

In order to improve the cleaning effect on the bubbling device and the pipeline in the liquid outlet direction, the step S1 further includes the following steps:

and S5, switching on the power supply of the mixed heating device, heating the inflowing water, and then washing the two-position three-way valve and the foaming device with hot water.

In order to ensure the cleanliness of the system, before preparing for a longer period of deactivation, the working method further comprises the following steps:

s6, turning off the gas-liquid mixing pump, emptying the milk storage tank, and cleaning the milk storage tank;

s7, taking out the three-way check valve, immersing the three-way check valve into water, restarting the gas-liquid mixing pump and the water pump, closing the gas circuit stop valve, sucking water into the water circuit and the milk circuit from the water storage tank and the three-way check valve, continuously pumping the water flow into the mixing and heating device by the gas-liquid mixing pump, and then flowing out to the two-position three-way valve;

and S8, opening and closing an outlet A and an outlet B of the two-position three-way valve in turn, cleaning the foaming device and discharging waste liquid.

According to the coffee machine milk path system capable of being automatically cleaned and the working method thereof, the integral structure of the coffee machine milk path is simplified by using the three-way one-way valve and the air quantity limiting device, and the coffee machine milk path does not need to be externally connected with a water source in a general cleaning process, so that the coffee machine is convenient to use.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment 1 of a milk path system of a self-cleaning coffee machine;

FIG. 2 is a schematic view showing the construction of an air volume restriction device in embodiment 1;

FIG. 3 is a schematic view showing the operation of cleaning the milk path system of the coffee maker of embodiment 1;

FIG. 4 is a schematic view showing the operation of discharging waste liquid after completion of cleaning in the milk path system of the coffee maker of embodiment 1;

fig. 5 is a schematic structural diagram of a three-way check valve in embodiment 2 of the automatic cleaning coffee machine milk path system and the working method thereof of the invention.

In the figure: the device comprises a water path 1, a milk path 2, a gas path 3, a mixed heating device 4, a foaming device 5, a two-position three-way valve 6, a waste liquid barrel 7, a water storage tank 10, a water pump 11, a water path stop valve 12, a gas-liquid mixing pump 20, a milk storage tank 21, a three-way one-way valve 22, a valve shell 220, a duckbill valve core 221, a liquid inlet hole 222, a connecting hole 223, a gas amount limiting device 30, a gas path stop valve 31, a shell 300 and limiting sheets 301.

Detailed Description

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