A steam wand and beverage machine

Abstract

The present application relates to the technical field of steam wand, in particular to a steam wand and a beverage machine, which comprises a steam pipe, an air pipe and a steam pipe are arranged in the steam pipe and are not connected; a connector is detachably mounted on the steam pipe, a flow guide pipe is arranged in the connector, the air pipe and the steam pipe are connected with the flow guide pipe, a check valve is arranged at the connection of the air pipe and the flow guide pipe, and the flow direction of the check valve is set to allow air to flow from the air pipe to the flow guide pipe only; a steam nozzle is detachably mounted on the connector, a gas outlet pipe and a detachable temperature sensing assembly are arranged in the steam nozzle, and the gas outlet pipe is connected with the flow guide pipe. When steam is generated, the check valve is in a closed state, so that steam cannot leak; when the steam generation is completed, the check valve is in an open state, so that the atmospheric pressure is connected, air enters the flow guide pipe through the air pipe and the check valve, the internal and external air pressures are balanced, and negative pressure suction of the beverage is avoided.

Description

Technical Field

[0001] This invention relates to the field of steam wand technology, and specifically to a steam wand and beverage machine. Background Technology

[0002] Beverage machines require certain drinks to be kept within a specific temperature range when preparing them, so they usually install a temperature sensor inside the steam wand to detect the temperature of the beverage.

[0003] For example, patent publication number CN222398007U discloses a steam bar and beverage processing equipment; it includes a steam pipe, with a steam conduit inside the pipe cavity for steam circulation; a nozzle connected to the outlet end of the steam conduit or one end of the steam pipe and communicating with the steam conduit; a nozzle sleeve fitted over the nozzle and connected to the steam pipe; and a temperature sensor installed on the nozzle sleeve, with the sensing end of the temperature sensor extending outside the nozzle sleeve. This prior art, by setting a temperature sensor on the steam bar, can be used to measure the temperature of a beverage while it is immersed in the beverage. However, this prior art still has structural shortcomings. After steam generation stops, the temperature drops, creating negative pressure, which can cause the beverage to be sucked back into the steam bar, leading to pipe blockage or unsanitary conditions, or even flowing into the steam generator, causing equipment malfunction. Furthermore, the temperature sensor is not removable, making it difficult to clean, which can lead to odors and bacterial growth.

[0004] Therefore, there is still room for improvement and development in existing technologies. Summary of the Invention

[0005] To address the problems of existing technologies, this invention provides a steam wand and beverage machine. By incorporating a check valve, it prevents negative pressure backflow into the beverage. Specifically, the check valve is closed during steam generation to prevent steam leakage; after steam generation, the check valve opens to allow atmospheric pressure to pass through the air pipe and check valve into the guide pipe, achieving internal and external air pressure balance and preventing negative pressure backflow into the beverage. Furthermore, the steam pipe, connector, steam nozzle, and temperature sensing component are all detachable, facilitating easy assembly, disassembly, and cleaning.

[0006] To achieve the above objectives, the technical solution applied in this invention is as follows: A steam wand includes a steam pipe with a non-connected air pipe and a steam pipe inside; a connector fixed to the steam pipe, with a guide pipe inside the connector, the air pipe and steam pipe respectively connected to the guide pipe, and a check valve 21 at the connection between the air pipe and the guide pipe, the flow direction of the check valve 21 being configured to allow only air to flow from the air pipe 13 to the guide pipe 22; and a steam nozzle detachably mounted on the connector, the steam nozzle having an outlet pipe and a detachable temperature sensing component inside, the outlet pipe being connected to the guide pipe. This configuration, by incorporating the check valve, prevents the backflow of beverages due to negative pressure. Specifically, the check valve is closed during steaming to prevent steam leakage; after steaming, the check valve opens, allowing atmospheric pressure to be maintained, and air enters the guide pipe after passing through the air pipe and the check valve, achieving internal and external pressure balance and preventing the backflow of beverages due to negative pressure.

[0007] According to the above scheme, the temperature sensing component includes a temperature sensing probe and a second bracket. The second bracket is detachably installed inside the steam nozzle. The first end of the temperature sensing probe is fixed to the second bracket, and the second end of the temperature sensing probe protrudes from the steam nozzle and is exposed. With this configuration, during use, the steam nozzle and the temperature sensing probe are immersed in the beverage to achieve the functions of steaming and temperature measurement.

[0008] According to the above scheme, the second bracket is provided with a second conductive pin, and the connector is provided with a first bracket, which is also provided with a first conductive pin. The first conductive pin and the second conductive pin are coupled together. With this configuration, when the first conductive pin and the second conductive pin are coupled, the circuit is conductive. When the steam nozzle is disassembled and drives the temperature sensing component away from the connector, the first conductive pin and the second conductive pin separate, breaking the circuit.

[0009] According to the above scheme, the second bracket is provided with a guide groove, and the first bracket is provided with a guide protrusion. The guide protrusion and the guide groove are interlocked. With this configuration, when assembling the steam nozzle and the connector, the guide protrusion is aligned with the guide groove and inserted. After insertion, the first conductive pin and the second conductive pin are in a coupled state, which facilitates assembly.

[0010] According to the above solution, a sealing sleeve is provided between the second bracket and the steam nozzle. This design prevents steam, water, and beverages from entering during and after steam generation.

[0011] According to the above solution, a sealing ring is provided between the bracket and the connector. This design prevents steam, water, and beverages from entering during and after steam generation.

[0012] According to the above scheme, a second sealing ring is provided at the connection between the connector and the steam pipe; a third sealing ring is provided at the connection between the steam nozzle and the connector. This arrangement can prevent steam, water, and beverages from entering during and after steam generation.

[0013] According to the above scheme, the steam pipe includes an outer pipe and an inner pipe, with the inner pipe located inside the outer pipe. An air pipe is located between the outer and inner pipes, and the steam pipe is located inside the inner pipe. This arrangement creates separate air and steam pipes by placing the inner pipe inside the outer pipe.

[0014] According to the above scheme, the check valve is a duckbill valve. This design is simple in structure and low in cost.

[0015] The beverage machine of the present invention includes a main unit and the aforementioned steam rod. The main unit is provided with a steam generator connected to the steam rod pipeline and an electronic control module electrically connected to the steam rod.

[0016] Beneficial effects of this invention: This invention is designed to prevent backflow of beverages due to negative pressure by incorporating a check valve. Specifically, the check valve is closed during steam generation to prevent steam leakage; after steam generation, the check valve opens to allow atmospheric pressure to be maintained. Air then passes through the air pipe and the check valve into the guide pipe, achieving internal and external air pressure balance and preventing backflow of beverages due to negative pressure. Furthermore, the steam pipe, connector, steam nozzle, and temperature sensing component are all detachable, facilitating easy assembly, disassembly, and cleaning. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the steam rod of the present invention; Figure 2 This is a cross-sectional view of the steam rod of the present invention; Figure 3 This is a cross-sectional view of the connector and steam nozzle assembly of the present invention; Figure 4 This is a cross-sectional view of the steam pipe and connector assembly of the present invention; Figure 5 This is an exploded view of the steam rod of the present invention; Figure 6 This is an exploded view of the temperature sensing component of the present invention; Figure 7 This is a schematic diagram of a beverage machine according to the present invention.

[0018] In the picture: 1. Steam pipe; 11. Outer pipe; 12. Inner pipe; 13. Air pipe; 15. Steam pipe; 2. Connector; 21. Check valve; 22. Flow guide pipe; 23. Conductive needle one; 24. Guide protrusion; 25. Bracket one; 3. Steam nozzle; 31. Temperature sensing component; 32. Air outlet pipe; 33. Conductive needle two; 34. Temperature sensor; 35. Bracket two; 36. Sealing sleeve; 37. Guide groove; 4. Steam generator; 5. Electrical control module. Detailed Implementation

[0019] The technical solution of the present invention will be described below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1 to 6 As shown, the steam rod of the present invention includes a steam pipe 1, which contains an air pipe 13 and a steam pipe 15 that are not connected; a connector 2, which is fixed to the steam pipe 1 and contains a guide pipe 22. The air pipe 13 and the steam pipe 15 are respectively connected to the guide pipe 22. A check valve 21 is provided at the connection between the air pipe 13 and the guide pipe 22. The flow direction of the check valve 21 is set to allow air to flow from the air pipe 13 to the guide pipe 22 only; and a steam nozzle 3, which is detachably installed on the connector 2. The steam nozzle 3 contains an outlet pipe 32 and a detachably installed temperature sensing component 31. The outlet pipe 32 is connected to the guide pipe 22. This design, with the check valve 21, prevents the backflow of beverages due to negative pressure. Specifically, when steaming, the check valve 21 is in a closed state to prevent steam leakage; after steaming, the check valve 21 is in an open state to connect to atmospheric pressure. Air enters the guide pipe 22 through the air pipe 13 and the check valve 21, achieving internal and external air pressure balance and preventing the backflow of beverages due to negative pressure.

[0021] The steam pipe 1, connector 2, steam nozzle 3, and temperature sensing component 31 are all detachable, making them easy to install, remove, and clean. During normal use, only the steam nozzle 3 and temperature sensing component 31 need to be installed, removed, and cleaned.

[0022] The air inlet of the air duct 13 is connected to the outside air, and the outlet is connected to the check valve 21.

[0023] Furthermore, the temperature sensing component 31 includes a temperature sensing probe 34 and a second bracket 35. The second bracket 35 is detachably installed inside the steam nozzle 3. The first end of the temperature sensing probe 34 is fixed to the second bracket 35, and the second end of the temperature sensing probe 34 protrudes from the steam nozzle 3. With this configuration, during use, the steam nozzle 3 and the temperature sensing probe 34 are immersed in the beverage to achieve the functions of steaming and temperature measurement.

[0024] Furthermore, the bracket 2 35 is provided with a conductive pin 2 33, and the connector 2 is provided with a bracket 1 25, on which a conductive pin 1 23 is provided. The conductive pin 1 23 and the conductive pin 2 33 are coupled together. With this configuration, when the conductive pin 1 23 and the conductive pin 2 33 are coupled, the circuit is conducted. When the steam nozzle 3 is disassembled and the temperature sensing component 31 is disengaged from the connector 2, the conductive pin 1 23 and the conductive pin 2 33 separate and disconnect the circuit.

[0025] Among them, such as Figure 4As shown, the position where the guide pipe 22 extends out of the connector 2 is lower than the position where the conductive needle 23 extends out of the connector 2. After the steam nozzle 3 is removed, the condensate in the guide pipe 22 flows out, which can effectively prevent the condensate from flowing to the position of the conductive needle 23.

[0026] Furthermore, the second bracket 35 is provided with a guide groove 37, and the first bracket 25 is provided with a guide protrusion 24. The guide protrusion 24 and the guide groove 37 are inserted into each other. With this arrangement, when assembling the steam nozzle 3 and the connector 2, the guide protrusion 24 is aligned with the guide groove 37 and inserted. After insertion, the first conductive pin 23 and the second conductive pin 33 are in a coupled state, which facilitates assembly.

[0027] Furthermore, a sealing sleeve 36 is provided between the bracket 35 and the steam nozzle 3. This design prevents steam, water, and beverages from entering during and after steam generation.

[0028] The sealing sleeve 36 is fitted around the outer periphery of the bracket 35 and is provided with a flow guide pipe 22 and a slot for the guide protrusion 24 to pass through.

[0029] Furthermore, a sealing ring 1 is provided between the bracket 25 and the connector 2; a sealing ring 2 is provided at the connection between the connector 2 and the steam pipe 1; and a sealing ring 3 is provided at the connection between the steam nozzle 3 and the connector 2. This arrangement prevents steam, water, and beverages from entering during and after steam generation.

[0030] A sealing ring is also provided between the bracket 25 and the guide pipe 22.

[0031] Furthermore, the steam pipe 1 includes an outer pipe 11 and an inner pipe 12, with the inner pipe 12 located inside the outer pipe 11. An air pipe 13 is located between the outer pipe 11 and the inner pipe 12, and a steam pipe 15 is located inside the inner pipe 12. This arrangement creates non-connected air pipe 13 and steam pipe 15 by placing the inner pipe 12 inside the outer pipe 11.

[0032] The air duct 13 is located between the inner wall of the outer tube 11 and the outer wall of the inner tube 12, and the air duct 13 also serves to facilitate the routing of the lead wire.

[0033] The outer tube 11 and the connector 2 can be connected by threads, welded, or both integrally formed; the inner tube 12 and the bracket 25 are locked by a locking pin, and a sealing ring is fitted on the locking pin.

[0034] Furthermore, the check valve 21 is a duckbill valve. This design results in a simple structure and low cost.

[0035] The inlet of the duckbill valve is connected to the outside air through the air pipe 13, and the outlet of the duckbill valve is connected to the guide pipe 22. When steam is being dispensed, the duckbill valve is closed when the steam flows through the steam pipe 15 to the guide pipe 22 to prevent steam leakage. After the steam is dispensed, the atmospheric pressure is greater than the pressure inside the guide pipe 22, so the duckbill valve is open. Air enters the guide pipe 22 through the air pipe 13 and the duckbill valve to achieve internal and external air pressure balance and prevent negative pressure backflow into the beverage.

[0036] like Figure 7 As shown, the beverage machine of the present invention includes a main unit and the aforementioned steam rod. The main unit is provided with a steam generator 4 connected to the steam rod pipeline and an electronic control module 5 electrically connected to the steam rod.

[0037] The steam generator 4 is connected to the inner pipe 12 via a steam circuit, i.e., connected to the steam pipe 15; the electrical control module 5 is connected to the conductive pin 23 via a lead wire.

[0038] The beverage machine can be a pressure coffee machine with a steam milk frothing function or a beverage maker with a steam wand.

[0039] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other modifications under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these modifications are within the scope of protection of the present invention.

Claims

1. A vapor stick, characterized in that, include: Steam pipe (1), wherein the steam pipe (1) is provided with an air pipe (13) and a steam pipe (15) that are not connected. Connector (2), the connector (2) is fixed on the steam pipe (1), the connector (2) is provided with a guide pipe (22), the air pipe (13) and the steam pipe (15) are respectively connected to the guide pipe (22), a check valve (21) is provided at the connection between the air pipe (13) and the guide pipe (22), and the flow direction of the check valve (21) is set to allow air to flow from the air pipe (13) to the guide pipe (22); Steam nozzle (3), which is detachably installed on connector (2), is provided with an outlet pipe (32) and a detachable temperature sensing component (31) inside the steam nozzle (3), and the outlet pipe (32) is connected to the guide pipe (22).

2. A vapor stick according to claim 1, characterized in that: The temperature sensing component (31) includes a temperature sensing probe (34) and a bracket (35). The bracket (35) is detachably installed inside the steam nozzle (3). The first end of the temperature sensing probe (34) is fixed on the bracket (35), and the second end of the temperature sensing probe (34) protrudes from the steam nozzle (3) and is exposed.

3. A vapor stick according to claim 2, characterized in that: The second bracket (35) is provided with a second conductive needle (33), the connector (2) is provided with a first bracket (25), the first bracket (25) is provided with a first conductive needle (23), and the first conductive needle (23) and the second conductive needle (33) are coupled together.

4. A vapor stick according to claim 3, characterized in that: The second bracket (35) is provided with a guide groove (37), and the first bracket (25) is provided with a guide protrusion (24). The guide protrusion (24) and the guide groove (37) are inserted into each other.

5. A vapor stick according to claim 2, wherein: A sealing sleeve (36) is provided between the second bracket (35) and the steam nozzle (3).

6. A vapor stick according to claim 3, wherein: A sealing ring is provided between the bracket (25) and the connector (2).

7. The vapor stick of claim 1, wherein: A second sealing ring is provided at the connection between the connector (2) and the steam pipe (1); a third sealing ring is provided at the connection between the steam nozzle (3) and the connector (2).

8. The vapor stick of claim 1, wherein: The steam pipe (1) includes an outer pipe (11) and an inner pipe (12), the inner pipe (12) is located inside the outer pipe (11), the air pipe (13) is located between the outer pipe (11) and the inner pipe (12), and the steam pipe (15) is located inside the inner pipe (12).

9. The vapor stick of claim 1, wherein: The check valve (21) is a duckbill valve.

10. A drinks machine characterised in that: It includes a main unit and a steam rod as described in any one of claims 1-9, wherein the main unit is provided with a steam generator (4) connected to the steam rod pipeline and an electrical control module (5) electrically connected to the steam rod.

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