Anti-scalding steam pipe for coffee machine

Abstract

The utility model discloses an anti-scald steam pipe for a coffee machine, which comprises a pipe body, one end of the pipe body is connected with a joint, and the other end of the pipe body is connected with a spray head; the periphery of the pipe body is sleeved with a heat insulation sleeve. Or, the pipe body comprises an outer pipe, an inner pipe is arranged in the outer pipe in a penetrating mode, a heat insulation space is formed between the inner pipe and the outer pipe, the heat insulation space is filled with heat insulation materials, no matter which mode is adopted, the long-time heat insulation effect can be maintained, the temperature of the outer pipe is kept within a safe range, and therefore the situation of scalding is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of coffee machine accessories, and specifically relates to an anti-scald steam pipe for a coffee machine. Background Art

[0002] Generally, a steam pipe for milk frothing is provided on a coffee machine. The traditional steam pipe is a metal pipe with fast heat transfer, and it is easy to cause scalding when a user accidentally touches the steam pipe. In order to avoid scalding, an insulating structure is currently provided in the steam pipe. The most common method is to use a vacuum for heat insulation. For example, in the patent document "CN213551248U, a new type of steam pipe", in its technical solution, a closed vacuum cavity in a vacuum state is provided between the metal inner pipe and the metal outer pipe, which can play a heat insulation role, so that users can be prevented from being scalded when using for a certain period of time;

[0003] However, in actual applications, there is no perfect vacuum, and it is impossible to achieve absolute sealing. External air will gradually enter the vacuum space, resulting in the failure of vacuum heat insulation, and it is irreversible. Especially in the commercial situation, the steam pipe will output hot steam for a long time, the inner pipe will heat up and transfer heat to the outer pipe through thermal radiation, causing the outer pipe to heat up, and there is still a risk of scalding. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an anti-scald steam pipe for a coffee machine to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An anti-scald steam pipe for a coffee machine includes a pipe body. One end of the pipe body is connected with a joint, and the other end is connected with a nozzle;

[0007] An insulating sleeve is sleeved on the outer periphery of the pipe body;

[0008] Alternatively, the pipe body includes an outer pipe, and an inner pipe is inserted into the outer pipe. An insulating space is formed between the inner pipe and the outer pipe, and the insulating space is filled with an insulating material.

[0009] As a further technical solution, the insulating material is polyurethane.

[0010] As a further technical solution, both ends of the outer pipe are hermetically connected to the outer periphery of the inner pipe, and the insulating material filled in the enclosed space is an inert gas.

[0011] As a further technical solution, the joint includes a first connector. One end of the first connector is threadedly connected to the outer pipe, and the other end is threadedly connected to a second connector. A connecting portion is provided in the second connector, and a first conduction hole is provided at the bottom of the connecting portion;

[0012] One end of the inner tube close to the joint penetrates through the outer tube and extends to a conduction hole. A first seal is sleeved on the penetrated part of the inner tube, and the first seal abuts against the inner wall of the first connecting member.

[0013] In a further technical solution, the first seal is in an "I" shape, and sealing rings are provided on both the inner and outer sides. The two sealing rings respectively abut against the outer wall of the inner tube and the inner wall of the first connecting member.

[0014] In a further technical solution, the nozzle includes a third connecting member. One end of the third connecting member is threadedly connected to the outer tube, and the other end is threadedly connected to the air jetting part. A plurality of air jetting holes are provided at the end of the air jetting part.

[0015] One end of the inner tube close to the nozzle penetrates through the outer tube and is provided with an air outlet hole. A second seal is sleeved on the penetrated part of the inner tube, and the second seal abuts against the inner wall of the third connecting member.

[0016] In a further technical solution, a gas guiding member is provided in the nozzle. One end of the gas guiding member abuts against the second seal and is provided with a cavity. The inner tube extends into the cavity. A second conduction hole is provided at the bottom of the cavity, and the second conduction hole communicates with the inner cavity of the air jetting part.

[0017] Advantages of the present utility model:

[0018] In the present utility model, a heat insulation sleeve is sleeved on the outer periphery of the tube body, or a heat insulation space is provided in the tube body. Heat insulation materials or inert gases can be filled in the heat insulation space to achieve the heat insulation effect. No matter which method is adopted, the long-term heat insulation effect can be maintained, the temperature of the outer tube can be kept within a safe range, and thus the situation of scalding can be avoided.

[0019] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. Description of the Drawings

[0020] Figure 1 : Three-dimensional structure diagram of the present utility model.

[0021] Figure 2 : Structure diagram of the tube body in the first embodiment of the present utility model.

[0022] Figure 3 : Cross-sectional view of the first embodiment of the present utility model.

[0023] Figure 4 : Structure diagram of the tube body in the second embodiment of the present utility model.

[0024] Figure 5 : Cross-sectional view of the second embodiment of the present utility model.

[0025] Reference numerals: 1 - pipe body, 11 - outer pipe, 12 - inner pipe, 13 - polyurethane, 14 - inert gas, 15 - air vent, 2 - joint, 21 - connecting piece one, 22 - connecting piece two, 23 - connecting part, 24 - conduction hole one, 25 - seal one, 3 - nozzle, 31 - connecting piece three, 32 - jetting part, 33 - jet hole, 34 - seal two, 35 - air guiding piece, 36 - cavity, 37 - conduction hole two. Detailed implementation manner

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] Please refer to Figures 1-5 ;

[0028] The steam pipe described in the present invention is applicable to a coffee machine. Since high-temperature steam passes through its interior, it will become hot after long-term use and is likely to scald users. Therefore, another anti-scalding method is proposed in addition to the vacuum structure. Specifically, it includes a pipe body 1. One end of the pipe body 1 is connected to a joint 2, and the other end is connected to a nozzle 3. Among them, the joint 2 is used to connect to a part of the coffee machine. A channel is provided in the pipe body 1 for transmitting steam, and the nozzle 3 is used to disperse and output the concentrated steam.

[0029] The concept in the present invention is that in order to prevent users from being scalded, it does not mean that the steam pipe will not emit heat, but that the temperature on the outside of the steam pipe does not reach the standard for scalding users, for example, controlled below 40°C. Although the current vacuum heat insulation method is preferred, it is also mentioned in the background technology that "it is impossible to achieve absolute sealing, and external air will gradually enter the vacuum space, resulting in the failure of vacuum heat insulation." In the embodiments of the present invention, one of the methods adopted is that a heat insulation sleeve (not shown in the figure) is sleeved on the outer periphery of the pipe body 1. The material of the heat insulation sleeve can be silicone. Although silicone can absorb the heat dissipated by the pipe body 1, the temperature rise is not high, which can play a certain anti-scalding effect. In addition, the heat insulation sleeve can cover the entire pipe body 1, or only cover the part that people often come into contact with, which is not limited here.

[0030] Another method adopted in the present invention is to provide a heat insulation structure in the pipe body 1, specifically including an outer pipe 11, and an inner pipe 12 is inserted into the outer pipe 11. In this embodiment, the outer pipe 11 and the inner pipe 12 can be made of plastic material or metal material. For a more textured feel, it is preferably made of metal material. An insulation space is formed between the inner pipe 12 and the outer pipe 11, and an insulation substance is filled in the insulation space. By filling the space with an insulation substance that can maintain the insulation for a long time, the insulation substances in the present invention are of the following types:

[0031] Embodiment 1. The heat-insulating material is polyurethane 13. Refer to Figure 3 , specifically, first, one section of the inner tube 12 and the outer tube 11 is welded and fixed, so that the relative positions of the inner tube 12 and the outer tube 11 are fixed. The fixed end is sealed first, that is, a limited space with a fixed position is formed, and the other end is still in an open state. Then, the melted polyurethane is poured into the heat-insulating space from the open opening, and after standing still until it solidifies, the other end is welded and sealed. At this time, both ends are in a sealed state. Even if there are some small gaps, it will not be affected. In this state, the polyurethane in the heat-insulating space will not contact the outside world and will not be accidentally eaten by people, fully meeting the food safety requirements;

[0032] Rigid polyurethane has a low thermal conductivity and good thermal performance. When the density of rigid polyurethane is 35 - 40 kg / m3, the thermal conductivity is only 0.018 - 0.024 W / (m·k), which is about half of that of EPS and is the lowest among all thermal insulation materials;

[0033] During use, the high-temperature steam will only contact the inner tube 12. After the inner tube 12 generates heat, due to the barrier of the polyurethane, the heat cannot be transferred to the outer tube 11. Therefore, when the user touches the outer tube 11, it will not cause burns. Of course, the inner tube 12 can transfer heat to the outer tube 11 through the welded position, but the transferred heat is small and does not reach the temperature of scalding.

[0034] It should be noted that the above is only one formation method of polyurethane. There should be other methods to form a sealed structure, so it should not be used as a limitation of the protection scope.

[0035] Embodiment 2. Refer to Figure 4 and Figure 5 , both ends of the pipe body 1 are hermetically connected to the outer periphery of the inner tube 12, and the heat-insulating material filled in the enclosed space is inert gas 14. The specific manufacturing method in this embodiment can be to use a vacuum pumping method to form a vacuum state in the heat-insulating space. The specific method of manufacturing the heat-insulating space is that through holes that can only allow the inner tube 12 to pass through are provided at both ends of the outer tube 11, thereby limiting the positions of the inner tube 12 and the outer tube 11, and then a welding method is used to form a seal. Preferably, an injection hole is provided at a section close to the joint 2, and after vacuum pumping is completed, the inert gas 14 is injected into the heat-insulating space;

[0036] The advantage of the injection method at the upper end is that the inert gas 14 is heavier than air. As long as there are no cracks at the welded position of the lower end, the inert gas 14 will not leak out from the upper end. Even if there are cracks at the lower end, the leakage will be slow. Of course, sealing sleeves can also be sleeved on both the upper and lower ends to prevent leakage. Utilizing the low thermal conductivity of the inert gas 14 can achieve a good heat insulation effect and can also achieve the effect of air pressure balance, avoiding the deformation of the outer tube 11.

[0037] No matter which method is adopted, it can maintain a long-term heat insulation effect, keep the temperature of the outer tube 11 within a safe range, and thus avoid the occurrence of scalding.

[0038] It should be noted that in the above two methods, the inner tube 12 extends out of the outer tube 11. Among them, in the implementation scheme using the inert gas 14, the heat insulation space needs to be in a nearly sealed state, while this method using polyurethane has no such limitation, and another method can be adopted to isolate it from the outside world;

[0039] Furthermore, the joint 2 includes a first connecting member 21. One end of the first connecting member 21 is threadedly connected to the outer tube 11, and the other end is threadedly connected to a second connecting member 22. A connecting portion 23 is provided in the second connecting member 22, and a first conduction hole 24 is provided at the bottom of the connecting portion 23; one end of the inner tube 12 close to the joint 2 passes through the outer tube 11 and extends to the first conduction hole 24. A first sealing member 25 is sleeved on the part of the inner tube 12 that passes through. The first sealing member 25 abuts against the inner wall of the first connecting member 21. Preferably, the sealing member is fixed on the outer periphery of the inner tube 12, and its bottom abuts against the polyurethane, which can completely isolate the polyurethane from the outside world. The first connecting member 21 and the second connecting member 22 are connected in a threaded split manner, mainly to have enough space to install the sealing member therein.

[0040] Preferably, the first sealing member 25 is in an "I" shape, and sealing rings are provided on both the inner and outer sides. The two sealing rings respectively abut against the outer wall of the inner tube 12 and the inner wall of the first connecting member 21.

[0041] Furthermore, the nozzle 3 includes a third connecting member 31. One end of the third connecting member 31 is threadedly connected to the outer tube 11, and the other end is threadedly connected to the air jetting portion 32. A plurality of air jet holes 33 are provided at the end of the air jetting portion 32; one end of the inner tube 12 close to the nozzle 3 passes through the outer tube 11 and is provided with an air outlet hole 15. A second sealing member 34 is sleeved on the part of the inner tube 12 that passes through. The second sealing member 34 abuts against the inner wall of the third connecting member 31; preferably, one end face of the second sealing member 34 abuts against the polyurethane, and in combination with the third connecting member 31, it can isolate the polyurethane from the outside world;

[0042] In addition, a gas guide member 35 is provided inside the nozzle 3. One end of the gas guide member 35 abuts against the second seal member 34, and a cavity 36 is provided. The inner tube 12 extends into the cavity 36. A second conduction hole 37 is provided at the bottom of the cavity 36, and the conduction hole communicates with the inner cavity of the second jet part 32.

[0043] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0044] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A scald-proof steam pipe for a coffee machine, comprising a pipe body (1), one end of the pipe body (1) is connected to a joint (2), and the other end is connected to a nozzle (3), characterized in that: The outer periphery of the tube body (1) is provided with a heat-insulating sleeve; Alternatively, the tube body (1) comprises an outer tube (11), an inner tube (12) is inserted into the outer tube (11), a heat-insulating space is formed between the inner tube (12) and the outer tube (11), and the heat-insulating space is filled with a heat-insulating material.

2. The anti-scalding steam pipe for a coffee machine according to claim 1, characterized in that: The heat insulating material is polyurethane (13).

3. The anti-scald steam pipe for a coffee machine according to claim 1, characterized in that: The two ends of the outer tube (11) are respectively sealed and connected to the outer periphery of the inner tube (12), and the heat insulating material filled in the enclosed space is an inert gas (14).

4. The anti-scald steam pipe for a coffee machine according to claim 2, characterized in that: The joint (2) comprises a first connecting piece (21), one end of which is threadedly connected to the outer tube (11), and the other end of which is threadedly connected to a second connecting piece (22), wherein a connecting portion (23) is provided in the second connecting piece (22), and a conducting hole (24) is provided at the bottom of the connecting portion (23); The end of the inner tube (12) close to the joint (2) passes through the outer tube (11) and extends to the conducting hole (24). A sealing member (25) is sleeved on the portion of the inner tube (12) passing through, and the sealing member (25) contacts the inner wall of the connecting member (21).

5. The anti-scalding steam pipe for a coffee machine according to claim 4, characterized in that: The sealing member 1 (25) is in the shape of an I-shaped Chinese character, and is provided with sealing rings on both the inner and outer sides, and the two sealing rings respectively contact the outer wall of the inner tube (12) and the inner wall of the connecting member 1 (21).

6. The anti-scald steam pipe for a coffee machine according to claim 2, characterized in that: The nozzle (3) comprises a third connecting member (31), one end of which is threadedly connected to the outer tube (11), and the other end of which is threadedly connected to the jet part (32), wherein a plurality of jet holes (33) are provided at the end of the jet part (32); The end of the inner tube (12) close to the nozzle (3) passes through the outer tube (11) and is provided with an air outlet (15). A second sealing member (34) is sleeved on the portion of the inner tube (12) passing through, and the second sealing member (34) contacts the inner wall of the third connecting member (31).

7. The anti-scald steam pipe for a coffee machine according to claim 6, characterized in that: An air guide (35) is provided in the nozzle (3), one end of the air guide (35) contacts the second sealing member (34) and is provided with a cavity (36), the inner tube (12) extends into the cavity (36), a second conduction hole (37) is provided at the bottom of the cavity (36), and the second conduction hole (37) is communicated with the inner cavity of the air injection portion (32).

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