# US 2021/0274977 A1 · Turbo fan steam milk frother

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- Number: US 2021/0274977 A1
- Document ID: US20210274977A1
- Status: Published application
- Kind: A1
- Application number: 16/618,035
- Filed: 2018-12-21
- Published: 2021-09-09
- Earliest claimed: 2018-04-02
- Assignees: Sandora Household Electric Applicances (Shenzhen) Ltd.
- Applicants: Sandora Household Electric Applicances (Shenzhen) Ltd.
- Inventors: Waihang LOUIE; Zhigang ZHU; Kwokwai WONG
- Web page: https://patentgrep.com/patent/US20210274977A1

## CPC

- A47J 43/126: {Tools whereby gas is introduced through their axis; Gas pumping means therefor}
- A47J 43/127: {Devices using a rotary mixing element, e.g. driven by the gas}
- A47J 31/4485: {Nozzles dispensing heated and foamed milk, i.e. milk is sucked from a milk container, heated and foamed inside the device, and subsequently dispensed from the nozzle}
- A47J 31/4489: {Steam nozzles, e.g. for introducing into a milk container to heat and foam milk}
- A47J 43/12: Whipping by introducing a stream of gas
- A47J: KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES

## Abstract

A fan-based steaming and foaming device is provided with a fan assembly and an activation device between a steam tube and an ejection tube. The invention employs an air pressure difference of a fan to directly inject, into a liquid, air required for foaming.

## Claims

### Claim 1

A turbo fan steam milk frother, wherein the turbo fan steam milk frother comprises:
a steam pipe, having one end applied to connecting to a steam preparation device;
a fan assembly, locating under the steam pipe, and connecting with the steam pipe; and
a sparging pipe, arranged at a lower end of the fan assembly, and at an end of the sparging pipe, there is a sparging hole arranged.

### Claim 2 (depends on 1)

The turbo fan steam milk frother according to claim 1, wherein the fan assembly comprises:
an outer shell, an upper end of the outer shell connects to the steam pipe, a lower end of the outer shell connects to the sparging pipe;
a fan frame, arranged in the outer shell;
a baffle, arranged inside the fan frame, applied to dividing the fan frame by the baffle into a steam chamber and an air chamber;
a first through hole, locating in the baffle;
a connection shaft, passing through the first through hole;
a driving fan, connecting to one end of the connection shaft, the driving fan locates inside the steam chamber, and under the steam pipe, applied to achieving that a steam sparged by the steam pipe drives the driving fan rotate; and
a driven fan, connecting to another end of the connection shaft, the driven fan locates inside the air chamber, applied to achieving that the connection shaft drives the driven fan rotate when the driving fan rotates.

### Claim 3 (depends on 2)

The turbo fan steam milk frother according to claim 2, wherein the fan frame comprises:
a steam passage, arranged on an upper end of the fan frame, the steam passage connects to the steam pipe; and
a sparging passage, arranged on a lower end of the fan frame, the sparging passage connects to the sparging pipe.

### Claim 4 (depends on 3)

The turbo fan steam milk frother according to claim 3, wherein the fan frame comprises:
a first fan cover, engaged with one side of the fan frame, the first fan cover locates outside of the driving fan, together with the baffle, to form the steam chamber;
a second fan cover, engaged with another side of the fan frame, the second fan cover locates outside of the driven fan, together with the baffle, to form the air chamber; and
an air pipe, the air pipe is arranged on the second fan cover, applied to inducing an air outside.

### Claim 5 (depends on 4)

The turbo fan steam milk frother according to claim 4, wherein comprising:
a first outer shell cover, engaged with one side of the outer shell;
a second outer shell cover, engaged with another side of the outer shell; and
a second through hole, arranged on the second outer shell cover, the second through hole engages the air pipe.

### Claim 6 (depends on 5)

The turbo fan steam milk frother according to claim 5, wherein the sparging pipe further comprises:
an air passage pipe, the air passage pipe connects to an air sparging passage;
a steam passage pipe, the steam passage pipe connects to a steam sparging passage.

### Claim 7 (depends on 6)

The turbo fan steam milk frother according to claim 6, wherein comprising:
a mixing chamber, located between the air passage pipe and the steam passage pipe, applied to mixing the air and the steam.

### Claim 8 (depends on 7)

The turbo fan steam milk frother according to claim 7, wherein the sparging pipe comprises: a tail end of the sparging pipe is bent to form a U shape.

### Claim 9 (depends on 6)

The turbo fan steam milk frother according to claim 6, wherein comprising: a shell body, arranged to cover an outer side of the sparging pipe, the shell body is screwed to the sparging pipe.

### Claim 10 (depends on 8)

The turbo fan steam milk frother according to claim 8, wherein comprising:
a shell body, arranged to cover an outer side of the sparging pipe, the shell body is screwed to the sparging pipe; and
a nozzle shell, arranged outside the sparging pipe, a shape of the nozzle shell adapts to that of the sparging pipe.

### Claim 11 (depends on 7)

The turbo fan steam milk frother according to claim 7, wherein comprising: a shell body, arranged to cover an outer side of the sparging pipe, the shell body is screwed to the sparging pipe.