Milk foam device and coffee machine

Abstract

The utility model relates to the field of coffee machines, in particular to a milk foam device and a coffee machine, the milk foam device comprises a base, a connecting piece and a milk foam nozzle, the connecting piece and the milk foam nozzle are installed on the base, and the connecting piece is provided with a conical nozzle arranged in a mixing cavity; the steam conveying channel is provided with a steam injection opening located in the center of the conical nozzle, the milk conveying channel is provided with a milk injection opening located in the top of the conical face of the conical nozzle and is coaxial with the conical nozzle, and the air conveying channel is provided with an air injection opening located in the side wall of the mixing cavity and facing the conical face of the conical nozzle. The axis of the cream jet orifice is parallel to the axis of the steam jet orifice, the axis of the air jet orifice is perpendicular to the axis of the steam jet orifice, and a one-way valve is arranged at the air jet orifice. By isolating the air conveying pipeline from the milk conveying pipeline, the technical problem that residual air flows back along with milk to cause milk pollution is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of coffee machine, concretely relates to a milk frother and coffee machine. BACKGROUND

[0002] The milk frother of the coffee machine is mainly used for making milk froth to make various flavored milk coffee drinks. The principle is to make the milk or milk froth liquid swell and produce fine air bubbles by injecting high-pressure steam. Specifically, when the steam contacts the milk, the whey protein molecules in the milk will be activated by the high temperature and high pressure of the steam, denature and form a network-like structure, and the air bubbles are also activated and begin to form, eventually forming milk froth.

[0003] Most of the existing milk frothers use high-pressure steam injection to create negative pressure in the mixing chamber, which sucks air and milk into the mixing chamber and mixes to form milk froth. For example, a beverage machine and its outlet device with the publication number CN207492625U, when the steam is delivered to the injection pipe of the milk frother through the steam pipe, a negative pressure is formed inside the milk frother, the milk and air are sucked into the injection pipe of the milk frother through the milk pipe joint, mixed with the steam and injected into the mixing chamber to fully mix and form milk froth. In this prior art, the air hole is located on the milk pipe joint, and under the action of negative pressure, the air enters the milk pipe joint first, and then enters the mixing chamber with the milk. This structure has defects, when the steam injection is stopped, air will be left in the milk pipe joint. Because the negative pressure environment in the mixing chamber disappears, the milk in the milk pipe joint will flow back, that is, the milk in the milk pipe joint will flow back to the milk tank along the pipe. This will cause the air mixed in the milk pipe joint to enter the milk tank, causing the milk in the milk tank to be contaminated. SUMMARY

[0004] To solve the above problems, a milk frother and coffee machine are provided, which isolate the air delivery pipe from the milk delivery pipe, solving the technical problem of residual air flowing back with the milk causing milk contamination.

[0005] The utility model provides a milk frother for coffee machine, including base and connecting piece and milk froth nozzle installed on the base, connecting piece has: mixing chamber for connecting milk froth nozzle, milk liquid delivery channel with mixing chamber intercommunication and for intercommunication milk liquid delivery pipe, steam delivery channel with mixing chamber intercommunication and for intercommunication steam delivery pipe, air delivery channel with mixing chamber intercommunication and for intercommunication air delivery pipe, connecting piece is equipped with the conical nozzle in the mixing chamber, steam delivery channel has the steam injection port in the central position of conical nozzle, milk liquid delivery channel has the milk liquid injection port in the top of conical face and with conical nozzle coaxial line, air delivery channel has the air injection port on the lateral wall of mixing chamber and towards the conical face of conical nozzle, the axis of milk liquid injection port is parallel with the axis of steam injection port, the axis of air injection port is perpendicular to the axis of steam injection port, and the one-way valve is equipped at air injection port.

[0006] Preferably, the connecting piece is an integrally formed rubber piece.

[0007] Preferably, the one-way valve is integrally formed at the valve of the air injection port.

[0008] Preferably, the base is provided with a quick-release socket for mounting the connecting piece, and the connecting piece is provided with a quick-release insertion hole matched with the quick-release socket.

[0009] Preferably, the base is provided with a first mounting hole for fixing the milk froth nozzle, and the milk froth nozzle is provided with a threaded hole matched with the first mounting hole.

[0010] Preferably, the milk froth nozzle is provided with an insertion end matched with the mixing chamber in a plug-in manner, and the insertion end is provided with a sealing ring.

[0011] Preferably, the milk froth nozzle is further provided with an outlet end, and the base is provided with a second mounting hole for inserting the outlet end.

[0012] Preferably, the connecting piece is provided with a first quick-release connector connected with the milk liquid delivery channel, and the base is provided with a first support for fastening the first quick-release connector.

[0013] Preferably, the connecting piece is provided with a second quick-release connector connected with the steam delivery channel and a third quick-release connector connected with the air delivery channel.

[0014] A coffee machine comprising the milk frother.

[0015] The utility model discloses beneficial effect compared with prior art is: the air delivery pipeline and milk liquid delivery pipeline are isolated, and the valve of air delivery channel is opened only when the negative pressure reaches the preset value, and at this time, air can enter into the mixing cavity;When the negative pressure reduces, the valve is closed preferentially, and the milk liquid is finally stopped extracting only when the steam stops injecting.Effectively avoid the milk liquid reflux to the air channel and solidify and block, make the air channel keep unobstructed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic of a milk frother of the utility model Figure 1 .

[0017] Figure 2 It is a three-dimensional structure schematic of a milk frother of the utility model Figure 2 .

[0018] Figure 3 It is a three-dimensional exploded structure schematic of a milk frother of the utility model Figure 1 .

[0019] Figure 4 It is a three-dimensional exploded structure schematic of a milk frother of the utility model Figure 1 .

[0020] Figure 5 It is a plan view of a milk frother of the utility model.

[0021] Figure 6 It is Figure 5 A-A direction section view structure schematic drawing in.

[0022] Figure 7 It is a side view of a milk frother of the utility model.

[0023] Figure 8 It is Figure 7 B-B direction section view structure schematic drawing in.

[0024] Figure 9 It is a three-dimensional section view structure schematic of a milk frother of the utility model.

[0025] The reference numeral in the drawing is: 1, base;1a, quick release socket;1b, first mounting hole;1c, second mounting hole;2, connecting piece;2a, mixing cavity;2b, milk liquid delivery channel;2c, steam delivery channel;2d, air delivery channel;2e, conical nozzle;2f, valve;2g, quick release socket;3, milk froth nozzle;3a, insertion end;3b, liquid outlet end;3c, screw hole;4, first quick release joint;5, second quick release joint;6, third quick release joint;7, first support;8, second support;9, connecting lug. DETAILED DESCRIPTION

[0026] In order to further understand the features, technical means and specific purposes and functions of the utility model, the utility model will be described in further detail below in combination with the drawings and specific embodiments.

[0027] Referring to Figures 1 to 9 The milk frother shown in the figure is used for a coffee machine and comprises a base 1, a connecting piece 2 and a milk frothing nozzle 3 mounted on the base 1. The connecting piece 2 has a mixing cavity 2a for connecting the milk frothing nozzle 3, a milk liquid delivery channel communicating with the mixing cavity 2a and used for communicating with a milk liquid delivery pipe, a steam delivery channel 2c communicating with the mixing cavity 2a and used for communicating with a steam delivery pipe, and an air delivery channel 2d communicating with the mixing cavity 2a and used for communicating with an air delivery pipe. The connecting piece 2 is provided with a conical nozzle 2e arranged in the mixing cavity 2a. The steam delivery channel 2c has a steam injection port located at the center of the conical nozzle 2e. The milk liquid delivery channel 2b has a milk liquid injection port located at the top of the conical surface of the conical nozzle 2e and coaxial with the conical nozzle 2e. The air delivery channel 2d has an air injection port located on the side wall of the mixing cavity 2a and facing the conical surface of the conical nozzle 2e. The axis of the milk liquid injection port is parallel to the axis of the steam injection port. The axis of the air injection port is perpendicular to the axis of the steam injection port. A one-way valve is arranged at the air injection port. The air delivery is effectively isolated from the milk liquid delivery by arranging the independent air delivery channel 2d. The high-speed injected steam forms a negative pressure in the mixing cavity 2a, which first forms a suction effect on the milk liquid in the milk liquid delivery channel 2b. The one-way valve can be opened only when the negative pressure value reaches a preset value. After the one-way valve is opened, air is sucked into the mixing cavity 2a to form milk froth. When the steam is stopped (milk froth making is completed), the one-way valve is closed first after the negative pressure value in the mixing cavity 2a is reduced. The milk liquid backflow to the air channel is effectively avoided to prevent solidification and blockage, so that the air channel remains unobstructed.

[0028] The connecting piece 2 is an integrally formed rubber piece. The integrally formed rubber piece can integrally form the steam delivery channel, the milk liquid delivery channel 2b and the air delivery channel 2d. The one-way valve is integrally formed at the valve 2f of the air injection port. The one-way valve formed by the valve 2f integrally formed at the air injection port can greatly reduce the manufacturing cost and has good sealing performance.

[0029] The base 1 is provided with a quick release socket 1a for mounting the connecting piece 2. The connecting piece 2 is provided with a quick release insertion hole 2g matched with the quick release socket 1a.

[0030] The base 1 is provided with a first mounting hole 1b for fixing the milk frothing nozzle 3. The milk frothing nozzle 3 is provided with a threaded hole 3c matched with the first mounting hole 1b.

[0031] The milk frothing nozzle 3 is provided with an insertion end 3a inserted and matched with the mixing cavity 2a. The insertion end 3a is sleeved with a sealing ring.

[0032] The milk froth nozzle 3 is further provided with a liquid outlet end 3b, and the base 1 is provided with a second mounting hole 1c for inserting the liquid outlet end 3b.

[0033] The connecting piece 2 is mounted with a first quick release connector 4 connected with the milk liquid conveying channel, and the base 1 is provided with a first support 7 for fastening the first quick release connector 4.

[0034] The connecting piece 2 is mounted with a second quick release connector 5 connected with the steam conveying channel 2c and a third quick release connector 6 connected with the air conveying channel 2d.

[0035] Further, a second support 8 is provided, and the second quick release connector 5 and the third quick release connector 6 are integrally formed on the second support 8. The second support 8 and the base 1 are both provided with a connecting lug 9 connected with the coffee machine.

[0036] A coffee machine comprising the milk froth device.

[0037] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A milk frother for a coffee machine, comprising a base (1) and a connector (2) and a milk frothing nozzle (3) mounted on the base (1), characterized in that, The connector (2) has: Mixing chamber (2a) is used to connect milk frothing nozzle (3); The milk delivery channel is connected to the mixing chamber (2a) and is used to connect the milk delivery pipe; A steam delivery channel (2c) is connected to a mixing chamber (2a) and is used to connect a steam delivery pipe; An air delivery channel (2d) is connected to a mixing chamber (2a) and is used to connect an air delivery pipe; The connector (2) is provided with a conical nozzle (2e) placed in the mixing chamber (2a); the steam conveying channel (2c) has a steam injection port located at the center of the conical nozzle (2e); the milk conveying channel (2b) has a milk injection port located at the top of the conical surface of the conical nozzle (2e) and coaxial with the conical nozzle (2e); the air conveying channel (2d) has an air injection port located on the side wall of the mixing chamber (2a) and facing the conical surface of the conical nozzle (2e); the axis of the milk injection port is parallel to the axis of the steam injection port, the axis of the air injection port is perpendicular to the axis of the steam injection port, and a one-way valve is provided at the air injection port.

2. A milk frother according to claim 1, characterized in that, The connector (2) is a one-piece molded rubber part.

3. A milk frother according to claim 2, characterized in that, The one-way valve is integrally formed on the valve (2f) at the air injection port.

4. A milk frother according to claim 3, characterized in that, The base (1) is provided with a quick-release socket (1a) for installing the connector (2), and the connector (2) is provided with a quick-release socket (2g) that mates with the quick-release socket (1a).

5. A milk frother according to claim 3, characterized in that, The base (1) is provided with a first mounting hole (1b) for fixing the milk foam nozzle (3), and the milk foam nozzle (3) is provided with a threaded hole (3c) that mates with the first mounting hole (1b).

6. A milk frother according to claim 3, characterized in that, The milk frothing nozzle (3) is provided with an insertion end (3a) that is fitted into the mixing chamber (2a), and the insertion end (3a) is fitted with a sealing ring.

7. A milk frother according to claim 6, characterized in that, The milk frothing nozzle (3) is also provided with a liquid outlet end (3b), and the base (1) is provided with a second mounting hole (1c) into which the liquid outlet end (3b) is inserted.

8. A milk frother according to claim 3, characterized in that, The connector (2) is equipped with a first quick-release connector (4) that is connected to the milk delivery channel, and the base (1) is provided with a first bracket (7) for fastening the first quick-release connector (4).

9. A milk frother according to claim 2, characterized in that, The connector (2) is equipped with a second quick-release connector (5) connected to the steam delivery channel (2c) and a third quick-release connector (6) connected to the air delivery channel (2d).

10. A coffee machine, characterized in that, Includes the milk frother as described in any one of claims 1-9.

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