External milk foaming device of full-automatic coffee machine

Abstract

The utility model discloses an external milk foaming device of a full-automatic coffee machine. The external milk foaming device comprises a milk tank and a foaming head buckled on the milk tank, a mixing cavity as well as a suction pipe, a steam inlet pipe and a milk foam outlet pipe which are connected to the mixing cavity are arranged in an upper cover and a lower cover of the foaming head; a steam inlet pipe of the foaming head can be connected to a steam rod at the front end of the full-automatic coffee machine and used for inputting hot steam into the mixing cavity, and milk in the milk tank is pressed into the mixing cavity through a suction pipe and heated by means of atmospheric pressure through the Venturi effect. An air inlet bypasses a pipeline of the steam inlet pipe, the air inlet is connected to an air inlet rotary valve through a guide pipe, and the air inlet rotary valve can be adjusted to control the proportion of air entering the mixing cavity together with hot steam through the guide pipe and the air inlet, so that milk in the mixing cavity is foamed.

Description

Technical Field

[0001] The utility model relates to a milk frothing device, in particular to an external milk frothing device of a full-automatic coffee machine. Background Art

[0002] Most of the fully automatic coffee machines for home use are equipped with a milk frothing device at the coffee outlet, the thickness of which cannot be adjusted manually. This device has the following defects: it is difficult to control the thickness of the milk froth, the quality of the milk froth is unstable, the failure rate is high, and it is not convenient for hygienic cleaning and storage of the remaining milk. Utility Model Content

[0003] In view of the above-mentioned defects of the prior art, the utility model provides an external milk frothing device for a fully automatic coffee machine, comprising a milk tank and a frothing head buckled on the milk tank; a mixing chamber is arranged in the upper cover and the lower cover of the frothing head, as well as a suction pipe, a steam inlet pipe and a milk froth outlet pipe connected to the mixing chamber; the steam inlet pipe of the frothing head can be connected to the steam rod at the front end of the fully automatic coffee machine, so as to input hot steam into the mixing chamber, and through the Venturi effect, the milk in the milk tank is pressed into the mixing chamber through the suction pipe with the help of atmospheric pressure and heated; an air inlet is bypassed on the pipeline of the steam inlet pipe, and the air inlet is connected to the air inlet rotary valve through a conduit, and the proportion of air entering the mixing chamber together with the hot steam through the conduit and the air inlet can be controlled by adjusting the air inlet rotary valve, so that the milk in the mixing chamber is frothed.

[0004] Furthermore, the milk tank and the foaming head are detachable.

[0005] Furthermore, at the initial start-up, by adjusting the air intake rotary valve to reduce or close the air intake, a negative pressure zone can be quickly formed in the mixing chamber, making it easier to pump milk.

[0006] Furthermore, the wider the air intake rotary valve is opened, the more air is taken in, and the larger the milk foam produced by the milk foam outlet pipe is, and vice versa. Hot milk without milk foam can also be obtained after the air intake rotary valve is completely closed.

[0007] Furthermore, the milk can is a transparent plastic box.

[0008] Furthermore, the milk can and the foaming head buckled on the milk can are connected via snaps.

[0009] Furthermore, the milk froth outlet tube is rotatable to adapt to different coffee cup types.

[0010] The external milk frothing device of the fully automatic coffee machine of the utility model is an interchangeable device. The user can unplug the frothing device together with the milk tank, and then insert the steam wand to manually control the DIY milk frothing. The bypass channel with adjustable air intake is built in. The user can open / close the air channel and adjust the size of the air intake through the external rotary valve, so as to obtain milk froth and milk foam of different coarseness and density according to personal preference. After closing the air intake, heated hot milk without milk foam can also be obtained. Different from the milk frothing device built into the coffee outlet, the milk frothing device external to the milk tank can be directly taken out and refrigerated in the refrigerator when not in use for a long time to prevent the residual milk from deteriorating. After a working cycle is completed, the remaining residual liquid will not be retained at the coffee outlet to pollute the machine.

[0011] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional diagram of an external milk frothing device in a preferred embodiment of the utility model;

[0013] Figure 2 yes Figure 1 Partial disassembly diagram of the external milk frothing device;

[0014] Figure 3 yes Figure 2 Further disassembly diagram of the external milk frothing device. DETAILED DESCRIPTION

[0015] The following describes several preferred embodiments of the utility model with reference to the drawings in the specification, so that the technical content is clearer and easier to understand. The utility model can be embodied in many different forms of embodiments, and the protection scope of the utility model is not limited to the embodiments mentioned in the text.

[0016] As shown in 1-3, the external milk frothing device of the fully automatic coffee machine according to the utility model comprises a milk tank 1 and a frothing head 2 detachably buckled on the milk tank 1. A suction pipe 3, a steam inlet pipe 4, a milk froth outlet pipe 6, a mixing chamber 8, an air inlet 41, and an air inlet rotary valve 5 are arranged in the upper cover 21 and the lower cover 22 of the frothing head 2.

[0017] The steam inlet pipe 4 of the foaming head 2 can be connected to the steam rod at the front end of the fully automatic coffee machine, and is used to input hot steam into the mixing chamber 8. Through the Venturi effect, the milk in the milk tank 1 is pressed into the mixing chamber 8 through the suction pipe 3 by atmospheric pressure and heated. An air inlet 41 is bypassed on the steam inlet pipe 4, and the air inlet 41 is connected to the air inlet rotary valve 5 through the conduit 7. By adjusting the air inlet rotary valve 5, the ratio of air entering the mixing chamber 8 through the conduit 7 and the air inlet 41 together with the hot steam can be controlled, thereby forming a pipeline ratio mixer together to make the milk in the mixing chamber 8 foamed.

[0018] The user can adjust the air intake amount according to personal preference by adjusting the air intake rotary valve 5, so as to obtain milk froth or milk foam of different thickness and density. The larger the air intake rotary valve 5 is opened, the more air is taken in, and the larger the milk froth produced by the milk froth outlet pipe 6 is, and vice versa. When the air intake rotary valve 5 is completely closed, hot milk without milk froth can also be obtained.

[0019] At the beginning of startup, due to the presence of air in the mixing chamber and the pipeline, an effective negative pressure zone cannot be formed in the mixing chamber, resulting in the failure to suck milk. At this time, you can turn the knob to close or reduce the air intake to quickly form a negative pressure zone in the mixing chamber, reduce the failure rate during use, and achieve stable milk foam cup quality.

[0020] When not in use, the external milk frothing device can be placed in the refrigerator to keep it fresh to prevent the residual milk from spoiling. The high calcium milk at 4-7 degrees Celsius has the best frothing effect. When in use, take the external milk frothing device out of the refrigerator and directly connect it to the steam rod of the fully automatic coffee machine. When cleaning, the frothing head 2 can be removed from the milk tank 1 and cleaned separately.

[0021] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. An external milk frothing device for a fully automatic coffee machine, characterized in that: The invention comprises a milk tank and a frothing head buckled on the milk tank; a mixing chamber is arranged in the upper cover and the lower cover of the frothing head, and a suction pipe, a steam inlet pipe and a milk froth outlet pipe connected to the mixing chamber are arranged; the steam inlet pipe of the frothing head can be connected to the steam rod at the front end of the fully automatic coffee machine, so as to input hot steam into the mixing chamber, and through the Venturi effect, the milk in the milk tank is pressed into the mixing chamber through the suction pipe with the help of atmospheric pressure and heated; an air inlet is bypassed on the pipeline of the steam inlet pipe, and the air inlet is connected to the air inlet rotary valve through a conduit, and the proportion of air entering the mixing chamber through the conduit and the air inlet together with the hot steam can be controlled by adjusting the air inlet rotary valve, so that the milk in the mixing chamber is frothed.

2. The external milk frothing device of the fully automatic coffee machine according to claim 1, wherein: The milk tank and foaming head are detachable.

3. The external milk frothing device of the fully automatic coffee machine according to claim 1, wherein: The wider the air intake rotary valve is opened, the more air is taken in, and the larger the milk foam produced by the milk foam outlet pipe is, and vice versa. Hot milk without milk foam can also be obtained by completely closing the air intake rotary valve.

4. The external milk frothing device of the fully automatic coffee machine according to claim 1, wherein: During the initial startup, by adjusting the air intake rotary valve to reduce or close the air intake, a negative pressure zone can be quickly formed in the mixing chamber, making it easier to pump milk.

5. The external milk frothing device of the fully automatic coffee machine according to claim 1, wherein: The milk can is a transparent plastic box.

6. The external milk frothing device of the fully automatic coffee machine according to claim 1, wherein: The milk can and the foaming head buckled on the milk can are connected by snaps.

7. The external milk frothing device of the fully automatic coffee machine according to claim 1, wherein: The milk froth outlet tube can be rotated to fit different coffee cup sizes.

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