Heating pipe and heating device

Abstract

The embodiment of the utility model discloses a heating pipe and a heating device, the heating pipe is applied to the heating device, the heating pipe can heat liquid flowing in the heating pipe, the heating pipe comprises a pipe body, the pipe body comprises an outer wall and an inner wall, a heating assembly is arranged on the outer wall, a noise reduction area is formed on the inner wall of the middle section of the pipe body, and the noise reduction area is arranged on the inner wall of the middle section of the pipe body. A plurality of protrusions are distributed in the silencing area at intervals and extend inwards in the radial direction of the pipe body. Compared with the prior art that the pipe body of the heating pipe adopts a smooth surface, the inner wall of the pipe body is provided with the plurality of bulges, and the structure formed by the bulges can puncture bubbles, so that the noise can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heating components of hot drink equipment, in particular to a heating tube and a heating device. Background Art

[0002] Hot drink equipment such as water dispensers, coffee machines, and milk warmers have become part of people's homes, and the heating device is one of the core components of these hot drink equipment. When the heating device heats the liquid, as the temperature of the heating area rises, the liquid can be continuously heated. Bubbles will form in the liquid during the heating process, and the bubbles will move with the flow of the liquid. During the movement, the bubbles will burst and form sounds, which can generate loud noises, directly affecting people's life experience.

[0003] In the related art, a vibration isolation method is used to isolate the heating body in a space to reduce noise, but the effect of this noise reduction method is not ideal. Utility Model Content

[0004] Based on this, it is necessary to propose a heating tube and a heating device that can effectively reduce noise in order to solve the above problems.

[0005] An embodiment of the utility model provides a heating tube, which is applied to a heating device. The heating tube can heat the liquid flowing therein, and comprises a tube body. The tube body comprises an outer wall and an inner wall. A heating component is arranged on the outer wall. A silencing zone is formed on the inner wall in the middle section of the tube body. A plurality of protrusions are distributed at intervals in the silencing zone, and the protrusions extend radially inwardly toward the tube body.

[0006] In some embodiments, bottom edges of any two adjacent protrusions are adjacent to each other.

[0007] In some embodiments, the cross-sectional shape of the silencing zone is circular or arc-shaped.

[0008] In some embodiments, the heating assembly comprises a thick film heating circuit, and the thick film heating circuit is wound around the outer wall.

[0009] In some embodiments, the heating assembly includes a thermostat, which is electrically connected to the thick film heating circuit and is used to monitor the operating status of the heating tube.

[0010] In some embodiments, the heating component includes at least two connection terminals, and the thick film heating circuit includes a positive electrode and a negative electrode, and each of the positive electrode and the negative electrode is connected to one of the connection terminals.

[0011] In some embodiments, the roughness Rz of the silencing zone is in the range of 3-12 μm.

[0012] The embodiment of the utility model further provides a heating device, comprising a bracket and the heating tube described above, wherein a mounting groove or a receiving cavity is formed on the bracket, and the heating tube is placed in the mounting groove or the receiving cavity.

[0013] In some embodiments, a water inlet end and a water outlet end are provided at both ends of the bracket, and both ends of the heating tube are fixed on the water inlet end and the water outlet end respectively.

[0014] The following beneficial effects are achieved by using the embodiments of the present invention:

[0015] According to the heating tube and heating device in the above embodiments, a plurality of protrusions are arranged on the inner wall, and these protrusions are located on the path where the liquid flows inside the tube body. The protrusions can increase the roughness of the inner wall of the tube body. When the liquid to be heated flows in the heating tube, as the temperature in the heating area increases, the liquid can be continuously heated. Bubbles formed in the liquid during the heating process can collide with the protrusions on the inner wall. When the bubbles collide with the protrusions, the protrusions can puncture the bubbles.

[0016] Compared with the smooth surface of the tube body of the heating tube in the related art, the present application has a plurality of protrusions on the inner wall of the tube body. The structure formed by these protrusions can easily puncture the bubbles formed on the inner wall, thereby reducing the amount of bubbles and avoiding the formation of a high-temperature zone on the inner wall due to excessive bubbles. As the bubbles break inside the tube body, the bubbles can be prevented from flowing with the liquid and generating noise. In addition, the noise generated by the bubbles breaking inside the tube body is smaller than that generated by the bubbles breaking outside the tube body. Furthermore, the rough surface formed by the protrusions can effectively absorb the sound generated by the vibration when the bubbles break. Therefore, the present application can more effectively reduce the noise generated when the heating tube heats the liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] in:

[0019] Figure 1 A schematic diagram of the structure of the heating tube provided by the utility model is shown;

[0020] Figure 2 Another structural schematic diagram of the heating tube provided according to the utility model is shown;

[0021] Figure 3A cross-sectional view of a heating device provided according to the utility model is shown.

[0022] Description of main component symbols:

[0023] 100, heating tube; 1, tube body; 11, outer wall; 12, inner wall; 13, protrusion; 131, ridge structure; 2, heating component; 21, thick film heating circuit; 22, temperature controller; 23, connecting terminal;

[0024] 200, bracket; 300, water inlet; 400, water outlet; 410, connector. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] With the progress of society and the improvement of living standards, hot drink equipment such as water dispensers, coffee machines and milk warmers have penetrated into people's homes, and the heating device is one of the core components of these hot drink equipment. When the heating device heats the liquid, as the temperature of the heating area rises, the liquid can be continuously heated. Bubbles will form in the liquid during the heating process, and the bubbles will move with the flow of the liquid. During the movement, the bubbles will burst and form sounds, which can generate loud noises, directly affecting people's life experience.

[0029] Noise generation mainly depends on three factors: the source, the transmission path and the receiver. The heating device is also a source. Noise control mainly focuses on acoustic noise control methods, generally including sound insulation, sound absorption and vibration isolation. Existing hot drink equipment such as water dispensers, coffee machines, and milk warmers often use vibration isolation methods to reduce noise for cost-effectiveness. Usually, the noise generated by the heating body in the heating device when heating liquid is difficult to reduce.

[0030] The bubbles formed when the existing heating body is heated are not easy to burst when the liquid flows. The inner wall of the heating body is subjected to great force and the surface is on the same dimension, which increases the vibration and relatively generates a loud sound. Generally, the effect of isolating the heating body in space by vibration isolation to reduce noise is poor. The present application provides a heating device capable of reducing noise.

[0031] Specifically, on one hand, the utility model provides a heating tube 100, which can be used in a heating device. When the heating tube 100 is used in the heating device, liquid to be heated can flow through the heating tube 100, and the heating tube 100 can heat the liquid flowing therein.

[0032] Specifically, in one embodiment, the heating tube 100 includes a tube body 1 and a heating assembly 2 disposed on the tube body 1, the tube body 1 has an outer wall 11 and an inner wall 12 disposed oppositely along its radial direction, the heating assembly 2 is disposed on the outer wall 11 of the tube body 1, and the inner wall 12 of the tube body 1 is surrounded by a central axis to form a liquid flow channel penetrating the tube body 1, and the central axis is the central axis in the length direction of the tube body. The shape of the tube body 1 is not limited, and in this embodiment, the tube body 1 is a round tube.

[0033] A silencer zone is formed on the inner wall 12 of the middle section of the tube body 1, and the silencer zone can reduce the noise when the liquid is heated. Specifically, a plurality of protrusions 13 are spaced apart and distributed on the inner wall 12 of the middle section of the tube body 1, and the protrusions 13 extend radially inwardly of the tube body 1. It should be noted that these protrusions 13 can be arranged around the circumference of the inner wall 12, and the protrusions 13 can be arranged on the inner wall 12 along the axis of the tube body 1, so that the protrusions 13 can be spread over at least a portion of the path of the inner wall 12.

[0034] When using existing heating tubes to heat liquids, there are three main sources of noise: First, because the inner wall of the existing heating tube is smooth, as the temperature rises, bubbles will be generated on the surface of the inner wall. The inside of these bubbles is a vacuum. When there are too many bubbles, a water-free area will be formed on the inner wall, leading to dry burning and forming a high-temperature zone. When the water subsequently contacts the high-temperature zone, a "hissing" sound of boiling water will be formed; second, when the bubbles flow with the liquid, a "gurgling" sound will be generated (similar to the sound produced when boiling water); third, the volume of the bubbles will increase as the liquid flows, and when the volume reaches a certain level, it will burst. The sound of the burst is also a source of noise. It should be noted that the bubbles may have burst while they are inside the heating tube, or they may burst after flowing out of the heating tube. When they burst outside the heating tube, the noise generated by the burst will be louder than the sound of the burst inside the heating tube. The above three noise sources make the noise louder when using existing heating devices to heat liquids.

[0035] By arranging a plurality of protrusions 13 on the inner wall, these protrusions 13 are located on the path where the liquid flows inside the tube body 1. The protrusions 13 can increase the roughness of the inner wall of the tube body 1. When the liquid to be heated flows in the heating tube 100, as the temperature in the heating area increases, the liquid can be continuously heated. Bubbles formed by the liquid during the heating process can collide with the protrusions on the inner wall 12. When the bubbles collide with the protrusions, the protrusions can puncture the bubbles.

[0036] Compared with the smooth surface of the tube body 1 of the heating tube 100 in the related art, the present application has a plurality of protrusions on the inner wall 12 of the tube body 1. The structure formed by these protrusions can easily puncture the bubbles formed on the inner wall 12, thereby reducing the amount of bubbles and preventing excessive bubbles from forming a high-temperature zone on the inner wall 12. As the bubbles break inside the tube body 1, the bubbles can be prevented from flowing with the liquid to generate noise. In addition, the noise generated by the bubbles breaking inside the tube body 1 is smaller than that generated by the bubbles breaking outside the tube body 1. Furthermore, the rough surface formed by the protrusions can effectively absorb the sound generated by the vibration when the bubbles break. Therefore, the present application can more effectively reduce the noise generated when the heating tube 100 heats the liquid.

[0037] In a specific embodiment, the protrusions 13 may be arranged regularly or irregularly on the inner wall 12. When the protrusions 13 are arranged, it is preferred that the bottom edges of any two adjacent protrusions 13 are adjacent to each other, so that the density of the protrusions 13 in the silencing zone can be ensured and the silencing effect can be enhanced.

[0038] In addition, the shape of the protrusion 13 is not limited, but in order to enhance the effect of puncturing the bubble, the protrusion 13 is preferably set to have an angular structure. For example, the protrusion 13 has a peripheral wall extending along the radial direction of the tube body 1, and a plurality of ridge structures 131 can be protruded on the peripheral wall. These ridge structures 131 can provide a knife-like effect. When the bubble collides with the ridge structure 131, the bubble is more easily punctured.

[0039] These ridge structures 131 are preferably arranged at intervals around the peripheral wall of the protrusion 13 , and these ridge structures 131 also extend from the inner wall 12 to a position away from the inner wall 12 along the radial direction of the tube body 1 .

[0040] In a specific embodiment, the end of the protrusion 13 away from the inner wall 12 is a plane or a curved surface, and the ridge structure 131 extends to the plane or the curved surface. In this way, the connection between the ridge structure 131 and the end surface of the protrusion 13 away from the inner wall 12 forms a relatively sharp structure, which can also puncture bubbles well.

[0041] Alternatively, the ends of the multiple ridge structures 131 away from the inner wall 12 meet at one point, so that the end of the protrusion 13 away from the inner wall 12 is set in a cone shape. In this way, the end of the protrusion 13 away from the inner wall 12 is a pointed structure, which can increase the effect of puncturing bubbles.

[0042] It should be noted that the cross-sectional shape of the silencing zone can be circular or arc-shaped. If the cross-sectional shape of the silencing zone is an arc, the arc can be a continuous single-segment arc or a discontinuous multi-segment arc, which will not be described in detail here.

[0043] The multiple protrusions 13 spaced apart on the silencing zone cause the silencing zone to form a rough surface. The top of the protrusion 13 is relatively close to the inner wall of the tube body 1 (the silencing zone is a part of the inner wall of the tube body), and the heights of the protrusions 13 are consistent to a certain extent. Therefore, in the silencing zone where the protrusions 13 are distributed, the roughness of the surface also fluctuates within a certain range. Optionally, the roughness Rz of the silencing zone fluctuates in the range of 3-12 μm. Furthermore, the roughness of the silencing zone can be roughly controlled at Rz=8 μm.

[0044] In addition, a method for determining whether the surface of the silencer zone of the inner wall 12 meets the processing requirements is to use a roughness detection device (the existing equipment for detecting roughness, its specific structure and the method for detecting roughness are all prior art and will not be described in detail in this application) to detect the surface roughness of the silencer zone.

[0045] In one embodiment, the heating assembly 2 includes a thick film heating circuit, which is wound on the outer wall 11. When in use, the heating circuit is energized to heat the interior of the tube body 1. The thick film heating circuit mainly includes an insulating layer (not shown in the figure), a resistor layer (not shown in the figure), a conductor layer (not shown in the figure), and a covering layer (not shown in the figure).

[0046] It should be noted that the thick film heating technology is to mix superconducting ceramic material powder with an organic adhesive solvent into a paste slurry, and use the screen printing technology to print the slurry in the form of circuit wiring or pattern on the base material, and sinter it through a strict heat treatment procedure to make a superconducting thick film. This thick film heating circuit has a simple structure and can quickly heat up after power is turned on. Because the wall thickness of the pipe body 1 is usually designed to be only 0.8mm, the heat can be quickly transferred to the liquid in the waterway.

[0047] The heating assembly 2 further includes a temperature controller 22 , which is electrically connected to the thick film heating circuit 21 . The temperature controller 22 can be used to monitor the operating state of the thick film heating circuit 21 .

[0048] The heating component 2 also includes at least two connecting terminals 23. The thick film heating circuit 21 has positive and negative electrodes. A connecting terminal 23 can be connected to the positive and negative electrodes of the thick film heating circuit 21. The connecting terminal 23 can be connected to an external circuit to provide electrical energy to the thick film heating circuit 21.

[0049] The thermostat 22 includes two specifications: a manual snap-action thermostat 22 and an automatic snap-action thermostat 22 . The thermostat 22 is made of ceramic and metal and is mainly used to monitor and protect the heating tube 100 .

[0050] The connection terminal 23 is mainly used to energize the heating component 2. There are usually two connection terminals 23, namely, the L terminal (the double-sided rate is L1 terminal and L2 terminal) and the N terminal, and the material is brass C2680.

[0051] On the other hand, the utility model also provides a heating device, which includes a bracket 200 and the above-mentioned heating tube 100, and the heating tube 100 is installed in the bracket 200. The bracket 200 may be provided with an installation groove or a receiving cavity to facilitate the heating tube 100 to be accommodated in the installation groove or the receiving cavity.

[0052] Specifically, the two ends of the bracket 200 are provided with a water inlet 300 and a water outlet 400, which can be fixedly connected to the bracket 200 by screws, and the ends of the water inlet 300 and the water outlet 400 facing the bracket 200 are both provided with a connector 410, and the heating tube 100 can be inserted into the bracket 200, and its two ends can be respectively clamped in the two connectors 410. The bracket 200, the water inlet 300 and the water outlet 400 are mainly made of plastic material, and the three are combined to fix the heating tube 100 for subsequent installation of the heating tube 100.

[0053] In addition, the thermostat and the connection terminal can be fixedly connected to the bracket 200. When in use, the electronic control system controls the switch of the heating component 2 and the water pump connected to the water inlet end 300 according to the temperature of the thermostat 22. The water pump is connected to the water inlet pipe. When the heating component 2 heats the water channel to the set temperature, the water pump is started. The water sucked by the water pump flows out through the heated pipe to the water outlet pipe connected to the water outlet end 400. The water temperature can be heated to boiling at room temperature without waiting. The thermostat 22 detects the water temperature to prevent dry burning and damage to the equipment.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A heating tube, used in a heating device, capable of heating a liquid flowing therein, characterized in that: It comprises a tube body, which comprises an outer wall and an inner wall. A heating component is arranged on the outer wall. A silencing zone is formed on the inner wall in the middle section of the tube body. A plurality of protrusions are spaced apart and distributed in the silencing zone. The protrusions extend radially inwardly of the tube body.

2. The heating tube according to claim 1, characterized in that: The bottom edges of any two adjacent protrusions are adjacent to each other.

3. The heating tube according to claim 2, characterized in that: The cross-section of the silencing zone is circular or arc-shaped.

4. The heating tube according to claim 1, characterized in that: The heating assembly comprises a thick film heating circuit which is wound around the outer wall.

5. The heating tube according to claim 4, characterized in that: The heating assembly comprises a temperature controller, which is electrically connected to the thick film heating circuit and is used to monitor the operating state of the heating tube.

6. The heating tube according to claim 5, characterized in that: The heating component comprises at least two connection terminals, and the thick film heating circuit comprises a positive electrode and a negative electrode, each of which is connected to one of the connection terminals.

7. The heating tube according to any one of claims 1 to 6, characterized in that: The roughness Rz of the silencing zone is in the range of 3-12 μm.

8. A heating device, characterized in that: It comprises a bracket and a heating tube as claimed in any one of claims 1 to 7, wherein a mounting groove or a receiving cavity is formed on the bracket, and the heating tube is placed in the mounting groove or the receiving cavity.

9. The heating device according to claim 8, characterized in that: The two ends of the bracket are provided with a water inlet end and a water outlet end, and the two ends of the heating pipe are respectively fixed on the water inlet end and the water outlet end.

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