Anti-dry heating tube structure for coffee machine

Abstract

The utility model discloses a kind of anti-dry-burning heating pipe structures for coffee machine, belong to heating pipe field, including shell, the two ends of the shell are respectively provided with import end and export end communicated therewith, the inside of the shell is provided with heating mechanism communicated with import end and export end along its axis position, the inside of the heating mechanism is provided with the flow guide mechanism that can realize water and jet two purposes, detection mechanism that can realize anti-dry-burning protection is further provided on the shell, the heating mechanism includes the heating pipe of being arranged in the shell, the heating pipe is electrically connected with the wire of external power supply by the connecting sheet on copper hoop.The anti-dry-burning heating pipe structure for coffee machine, water and jet two purposes are realized by flow guide structure, can satisfy the scene that coffee machine makes coffee needs hot water, milk froth needs steam respectively, without additional installation independent pipeline, adapt coffee machine multiple use needs, and can realize anti-dry-burning protection, effectively prolong the service life of heating pipe.

Description

Technical Field

[0001] This utility model relates to the field of heating tube technology, and in particular to a structure for an anti-dry-burning heating tube for a coffee machine. Background Technology

[0002] In the coffee machine industry, the heating element is the core component for achieving hot water supply and steam generation, and its performance directly affects the safety of coffee machine use, coffee quality, and operating efficiency.

[0003] However, existing coffee machine heating elements still have shortcomings in use: on the one hand, existing coffee machine heating elements rely on only a single or fixed-position temperature control element, making it difficult to fully capture changes in the temperature of the heating element wall. When the water level in the heating element is below the safe threshold, the heat cannot be absorbed by the water in time, causing the wall temperature to rise sharply and leading to dry burning. On the other hand, traditional coffee machine heating elements cannot simultaneously meet the dual functional requirements of water output and steam output in coffee machines. To achieve this dual function, separate water output pipes and steam output pipes need to be installed in the coffee machine, increasing the complexity of the internal structure of the equipment. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that the existing heating tube structure of coffee machines does not have the function of preventing dry burning and cannot simultaneously meet the dual functional requirements of water dispensing and steam jetting of coffee machines, and to propose a heating tube structure for coffee machines that prevents dry burning.

[0005] To achieve the above objectives, the present invention employs the following technology: a coffee machine anti-dry-burning heating tube structure, comprising a shell, wherein an inlet end and an outlet end connected to the shell are respectively provided at both ends, and a heating mechanism connected to the inlet end and the outlet end is provided inside the shell along its axial position. The heating mechanism is equipped with a flow guiding mechanism that can be used for both water output and air jet, and the outer shell is also equipped with a detection mechanism that can protect against dry burning.

[0006] As a further description of the above technical solution: the heating mechanism includes a heating tube disposed inside the outer casing, and the heating tube is electrically connected to the wire of an external power source through a connecting piece on a copper hoop.

[0007] As a further description of the above technical solution: the flow guiding mechanism includes a steel pipe disposed inside the heating pipe and arranged coaxially therewith, and a spring is provided on the outer wall of the steel pipe, and a flow guiding path is formed between the steel pipe and the heating pipe through the spring.

[0008] As a further description of the above technical solution: both ends of the steel pipe are provided with connecting end plates, and the inlet end and outlet end are connected to the heating channel between the heating pipe and the steel pipe through through holes opened on the connecting end plates.

[0009] As a further description of the above technical solution: a connecting pipe is also provided between the steel pipe and the outlet end, wherein the diameter of the connecting pipe is larger than the diameter of the steel pipe.

[0010] As a further description of the above technical solution: the detection mechanism includes a thermistor, which is connected to the controller through a connection terminal on a wire harness.

[0011] As a further description of the above technical solution: the number of thermistors is at least two, and the thermistors can be arranged around the periphery or vertically on the housing.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: By setting up a detection mechanism, using high-temperature thermistors that are flexibly positioned around the outer shell or above and below, the pipe wall temperature can be detected in real time. This can promptly detect temperature anomalies when the water level is below the maximum water level line, assisting in triggering anti-dry-burning protection and reducing the risk of dry-burning. The internal flow guide mechanism of the heating unit enables both water and steam output, which can meet the needs of coffee machines for making coffee with hot water and frothing milk with steam, respectively. No additional independent pipeline is required, which can adapt to the diverse needs of coffee machines. The flow guide mechanism can also play a supporting role, preventing the heating tube structure from shaking up and down, reducing friction loss between components, and maintaining the stability of the internal components of the heating tube. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure according to an embodiment of the present utility model is shown; Figure 2 A schematic diagram of the heating mechanism provided according to an embodiment of the present invention is shown; Figure 3 A cross-sectional schematic diagram according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of the flow guiding mechanism provided according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of the detection mechanism provided according to an embodiment of the present invention is shown.

[0014] Legend: 1. Outer shell; 2. Inlet end; 3. Outlet end; 4. Heating mechanism; 41. Heating tube; 42. Copper hoop; 43. Connecting piece; 5. Flow guiding mechanism; 51. Steel pipe; 52. Spring; 53. Connecting end plate; 54. Through hole; 55. Connecting pipe; 6. Detection mechanism; 61. Thermistor; 62. Wire harness; 63. Connecting terminal. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] Reference Figures 1-5 This embodiment provides a coffee machine anti-dry-burning heating tube structure, including a shell 1. The two ends of the shell 1 are respectively provided with an inlet end 2 and an outlet end 3 connected thereto. The heating mechanism 4 is provided inside the shell 1 along its axis and is connected to the inlet end 2 and the outlet end 3. The heating mechanism 4 includes a heating tube 41 disposed inside the shell 1. The heating tube 41 is electrically connected to the wire of an external power source through a connecting piece 43 on a copper hoop 42.

[0017] In this invention, the wire of the external power supply is electrically connected to the connecting piece 43 on the copper hoop 42 of the heating tube 41 in the heating mechanism 4. The current is conducted to the heating tube 41 through the connecting piece 43 and the copper hoop 42, providing electrical energy to the heating tube 41 so that the heating tube 41 can heat. The cold water to be heated enters the interior of the outer shell 1 through the inlet end 2 at one end of the outer shell 1, and then flows to the heating tube 41 in the heating mechanism 4 which is connected to the inlet end 2. After being powered on, the heating tube 41 continues to heat up and transfers heat to the water flowing inside. The water absorbs heat in the heating tube 41 and the temperature rises to the temperature required for coffee making. The hot water heated by the heating tube 41 is finally discharged through the outlet end 3 at the other end of the outer shell 1, providing the hot water required for coffee extraction in the coffee machine.

[0018] To prevent the heating element of the coffee machine from burning out during heating, a detection mechanism 6 is provided on the outer casing 1 to achieve dry burning protection. The detection mechanism 6 includes a thermistor 61, which is connected to the controller through the connection terminal 63 on the wiring harness 62.

[0019] The thermistor 61 is located on the outer casing 1 at the position corresponding to the heating area. When the water level in the heating tube 41 is lower than the safety threshold, the heat cannot be absorbed by the water in time, which will cause the temperature of the outer casing 1 to rise abnormally. The thermistor 61 can quickly detect this temperature change and transmit the monitored temperature signal to the controller of the coffee machine through the connection terminal 63 on the wiring harness 62. If the controller determines that the temperature of the outer casing 1 exceeds the safety threshold, it will stop the heating tube 41 from heating to prevent dry burning from continuing.

[0020] It should be noted that the number of thermistors 61 is at least two. Thermistors 61 can be arranged around the circumference or vertically on the casing 1, or irregularly arranged at positions corresponding to the heating area. By setting multiple thermistors 61, even if one thermistor 61 fails, the other can still monitor the temperature of the casing 1 and the heating area normally, ensuring that the anti-dry-burning protection function is not interrupted. Moreover, the multi-position arrangement allows the thermistors 61 to quickly capture temperature changes in different areas, shortening the transmission and response time of abnormal temperature signals, and further reducing the risk of dry burning.

[0021] The heating mechanism 4 is equipped with a flow guiding mechanism 5 that can be used for both water output and air jet. The flow guiding mechanism 5 includes a steel pipe 51 arranged coaxially inside the heating pipe 41. A spring 52 is provided on the outer wall of the steel pipe 51. A flow guiding path is formed between the steel pipe 51 and the heating pipe 41 through the spring 52. Both ends of the steel pipe 51 are provided with connecting end plates 53. The inlet end 2 and the outlet end 3 are connected to the heating channel between the heating pipe 41 and the steel pipe 51 through through holes 54 opened on the connecting end plates 53. A connecting pipe 55 is also provided between the steel pipe 51 and the outlet end 3. The diameter of the connecting pipe 55 is larger than the diameter of the steel pipe 51.

[0022] In the water outlet mode, cold water enters through the inlet end 2 of the outer shell 1 and flows into the heating channel between the steel pipe 51 and the heating pipe 41 through the through hole 54 of the connecting end plate 53. After the heating pipe 41 is powered on and heats up, the heat is transferred to the cold water in the heating channel. The spiral guide path formed by the spring 52 guides the cold water to flow evenly through the heating area to avoid uneven local heating. The hot water heated to the target temperature is discharged through the outlet end 3. In jet mode, cold water also enters the heating channel through inlet 2 and through hole 54 of connecting end plate 53. Heating tube 41 continuously heats up at high intensity, causing the water in the channel to quickly vaporize and generate steam. The spiral structure of spring 52 guides the steam along the guide path to outlet 3 on the one hand, and intercepts the incompletely vaporized liquid water droplets on the other hand, thus initially achieving water-vapor separation. After the pure steam flows through through hole 54 of connecting end plate 53, it enters the larger diameter connecting pipe 55. The diameter of connecting pipe 55 is larger than that of steel pipe 51, which can reduce the steam flow rate, buffer the pressure inside the pipe, and avoid steam turbulence. Finally, the steam is discharged smoothly through outlet 3 to meet the needs of milk frothing, etc.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dry-burning prevention heating element structure for a coffee machine, characterized in that, Includes a shell (1), with an inlet end (2) and an outlet end (3) respectively connected to the shell (1) at both ends, and a heating mechanism (4) connected to the inlet end (2) and the outlet end (3) is provided inside the shell (1) along its axis. The heating mechanism (4) is equipped with a flow guide mechanism (5) that can be used for both water output and air jet, and the outer shell (1) is also equipped with a detection mechanism (6) that can protect against dry burning.

2. The anti-dry-burning heating element structure for a coffee machine according to claim 1, characterized in that, The heating mechanism (4) includes a heating tube (41) disposed inside the outer casing (1), and the heating tube (41) is electrically connected to the wire of an external power source through a connecting piece (43) on a copper hoop (42).

3. The anti-dry-burning heating element structure for a coffee machine according to claim 2, characterized in that, The flow guiding mechanism (5) includes a steel pipe (51) arranged inside the heating pipe (41) and coaxially therewith. A spring (52) is provided on the outer wall of the steel pipe (51), and a flow guiding path is formed between the steel pipe (51) and the heating pipe (41) through the spring (52).

4. The anti-dry-burning heating element structure for a coffee machine according to claim 3, characterized in that, Both ends of the steel pipe (51) are provided with connecting end plates (53). The inlet end (2) and outlet end (3) are connected to the heating channel between the heating pipe (41) and the steel pipe (51) through the through hole (54) opened on the connecting end plate (53).

5. The anti-dry-burning heating element structure for a coffee machine according to claim 4, characterized in that, A connecting pipe (55) is also provided between the steel pipe (51) and the outlet end (3), wherein the diameter of the connecting pipe (55) is larger than the diameter of the steel pipe (51).

6. The anti-dry-burning heating element structure for a coffee machine according to claim 1, characterized in that, The detection mechanism (6) includes a thermistor (61), which is connected to the controller via a connection terminal (63) on a wire harness (62).

7. The anti-dry-burning heating element structure for a coffee machine according to claim 6, characterized in that, The number of thermistors (61) is at least two, and the thermistors (61) can be arranged around the periphery or vertically on the housing (1).

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