Novel heating pipe assembly

Abstract

The utility model discloses a novel heating pipe assembly which comprises a heating carrier, a flow guide end cover, a first temperature sensing element and a second temperature sensing element, the first temperature sensing element and the second temperature sensing element are used for detecting scale, and a heating circuit is arranged on the outer wall of the heating carrier. The first temperature sensing element is arranged at the water outlet end of the outer wall of the heating carrier, and the first temperature sensing element is used for measuring the water outlet temperature; the second temperature sensing element is arranged on the outer wall of the heating carrier, and the second temperature sensing element is located at the position close to the heating circuit and used for measuring the temperature of the heating carrier; the flow guide end cover is embedded and fixed at the water outlet end of the heating carrier, the circumferential side wall of the flow guide end cover is provided with a confluence duct communicated with an internal flow channel of the heating carrier, the confluence duct is communicated with a tubular column cavity of the flow guide end cover, and the position of the first temperature sensing element corresponds to the position of the inlet end of the confluence duct; the water scale detection device has the advantages of convenience in water scale detection, high detection efficiency and detection precision, simple structure and the like.

Description

Technical Field

[0001] This utility model relates to the field of drinking water heating technology, specifically a novel heating tube assembly. Background Technology

[0002] With the rapid development of membrane heating technology, the technology is becoming more and more mature, the products are becoming more and more abundant, and the application scenarios are becoming more and more extensive. When the membrane heater heats tap water, the minerals contained in the tap water adhere to the membrane heating carrier and gradually form scale. Scale has very poor thermal conductivity, which not only affects drinking water health, but also reduces the heating efficiency of the membrane heater. Existing heaters usually require periodic disassembly and inspection to detect whether scale has formed inside, but this has problems such as inconvenience, low detection efficiency, and low detection accuracy. Utility Model Content

[0003] The technical problem this invention aims to solve is to overcome existing defects and provide a novel heating tube assembly. Temperature sensing elements are arranged on the membrane heater. A first and a second temperature sensing element on the outer wall of the heating carrier respectively measure the outlet water temperature and the surface temperature of the heating area of ​​the heating carrier. Furthermore, the temperature difference between the surface temperature of the heating area and the outlet water temperature can be used to determine whether scale has formed on the inner wall of the heating carrier. Scale detection is convenient, efficient, and accurate. The structure is simple and easy to use, effectively solving the problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A novel heating tube assembly includes a heating carrier, a flow guide end cap, and a first temperature sensing element and a second temperature sensing element for detecting scale. The heating carrier has heating lines on its outer wall, and the area on the outer wall corresponding to the heating lines is the heating area. The heat generated by the heating lines is transferred to the fluid to be heated in the internal flow channel of the heating carrier. The first temperature sensing element is located at the outlet end of the outer wall of the heating carrier and is used to measure the outlet water temperature. The second temperature sensing element is located on the outer wall of the heating carrier, adjacent to the heating lines, and is used to measure the surface temperature of the heating area of ​​the heating carrier. The flow guide end cap has a tubular structure, is embedded and fixed to the outlet end of the heating carrier, and has a closed inner end. A confluence channel communicating with the internal flow channel of the heating carrier is opened on the circumferential side wall of the flow guide end cap, and the confluence channel is connected to the tubular cavity of the flow guide end cap. The position of the first temperature sensing element corresponds to the inlet end of the confluence channel.

[0005] Furthermore, a flow guide plug is fixedly nested at the water inlet end of the heating carrier, a flow guide column abuts between the flow guide plug and the flow guide end cap, a heating flow channel is formed between the flow guide column and the heating carrier, and a water inlet channel connected to the heating flow channel is opened on the flow guide plug.

[0006] Furthermore, the outer circumferential wall of the guide column is provided with spiral guide protrusions.

[0007] Furthermore, the second temperature sensing element is located at a certain water flow impact surface of the spiral guide protrusion of the guide column.

[0008] Furthermore, a helical spring is fixedly provided on the outer circumference of the guide column, and the helical spring forms a helical guide protrusion of the guide column.

[0009] Furthermore, one end of the helical spring is provided with a snap-fit ​​protrusion, and a snap-fit ​​groove adapted to the snap-fit ​​protrusion is provided on the side wall of the flow guide end cap. The snap-fit ​​protrusion of the helical spring is embedded in the snap-fit ​​groove, and the other end of the helical spring abuts against the flow guide plug.

[0010] Furthermore, the heating carrier is a metal tubular substrate, and the heating circuit is a film heating circuit.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This novel heating tube assembly measures the outlet water temperature and the surface temperature of the heating carrier's heating area respectively through a first temperature sensing element and a second temperature sensing element provided on the outer wall of the heating carrier. Furthermore, it can determine whether scale has formed on the inner wall of the heating carrier based on the temperature difference between the surface temperature of the heating carrier's heating area and the outlet water temperature. The heating assembly is convenient and efficient in detecting scale. The position of the first temperature sensing element corresponds to the inlet end of the confluence channel, resulting in higher accuracy in measuring the outlet water temperature. The second temperature sensing element is located at a water flow impact surface of the spiral guide protrusion of the guide column, where scale is more likely to form. This results in high scale detection accuracy, a simple structure, and convenient use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 for Figure 1 Enlarged view of a specific area;

[0014] Figure 3 This is a schematic diagram of the flow guide column structure of this utility model;

[0015] Figure 4 This is a schematic diagram of the guide end cap structure at the water outlet of the heating carrier of this utility model.

[0016] In the diagram: 1. Heating carrier; 2. Heating circuit; 3. First temperature sensing element; 4. Second temperature sensing element; 5. Flow guide column; 6. Flow guide end cap; 61. Converging duct; 7. Helical spring; 71. Snap-fit ​​protrusion; 8. Flow guide plug. Detailed Implementation

[0017] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0018] Please see Figure 1-4 This utility model provides a technical solution: a novel heating tube assembly, including a heating carrier 1, a flow guide end cap 6, and a first temperature sensing element 3 and a second temperature sensing element 4 for detecting scale. The heating carrier 1 has a heating line 2 on its outer wall, and the area on the outer wall corresponding to the heating line 2 is the heating area. The heat generated by the heating line 2 is transferred to the fluid to be heated in the internal flow channel of the heating carrier 1. The first temperature sensing element 3 is located at the water outlet end of the outer wall of the heating carrier 1 and is used to measure the water outlet temperature. The second temperature sensing element 4 is located on the outer wall of the heating carrier 1, adjacent to the heating line 2, and is used to measure the surface temperature of the heating area of ​​the heating carrier 1. The flow guide end cap 6 is a tubular structure and is embedded and fixed to the heating carrier 1. The water outlet end of the guide end cover 6 is closed on the inner side. A confluence channel 61 connected to the internal flow channel of the heating carrier 1 is opened on the circumferential side wall of the guide end cover 6. The confluence channel 61 is connected to the tube column cavity of the guide end cover 6. The position of the first temperature sensing element 3 corresponds to the position of the inlet end of the confluence channel 61. A guide plug 8 is fixedly nested at the water inlet end of the heating carrier 1. A guide column 5 abuts between the guide plug 8 and the guide end cover 6. A heating flow channel is formed between the guide column 5 and the heating carrier 1. A water inlet channel connected to the heating flow channel is opened on the guide plug 8. A spiral spring 7 is fixedly installed on the circumferential outer wall of the guide column 5. The spiral spring 7 forms a spiral guide protrusion of the guide column 5. The second temperature sensing element 4 is located at a water flow impact surface of the spiral guide protrusion of the guide column 5.

[0019] Working principle:

[0020] External water flows into the heating channel through the inlet channel of the guide plug 8. The heat generated by the heating line 2 on the heating carrier 1 is transferred to the heating carrier 1 to heat the fluid in the heating channel. The fluid in the heating channel flows spirally along the guide column 5 and the spiral spring 7 to the outlet end of the heating carrier 1. The heated fluid flows out from the tube column cavity of the guide end cover 6 through the confluence culvert 61.

[0021] Because scale tends to accumulate on surfaces with higher temperatures, scale easily forms on the inner wall of the heating carrier 1 at the location corresponding to the heating area. Since the thermal conductivity of scale is very low, the heat transfer from the heating circuit 2 on the outer surface of the heating carrier 1 to its inner wall is reduced, and the surface temperature of the heating area of ​​the heating carrier 1 increases.

[0022] The outlet water temperature is measured by the first temperature sensing element 3, and the surface temperature of the heating area of ​​the heating carrier 1 is measured by the second temperature sensing element 4. The temperature difference between the outlet water temperature detected by the first temperature sensing element 3 and the second temperature sensing element 4 and the temperature of the heating carrier 1 is used to determine whether scale has formed on the inner wall of the heating carrier 1.

[0023] When there is no scale on the inner wall of the heating carrier 1, the temperature difference between the surface temperature of the heating area of ​​the heating carrier 1 measured by the second temperature sensing element 4 and the outlet water temperature measured by the first temperature sensing element 3 is about 2℃. Therefore, when the temperature difference between the surface temperature of the heating area of ​​the heating carrier 1 and the outlet water temperature is greater than 2℃, it indicates that scale has begun to form on the inner wall of the heating carrier 1, but this does not affect the use of the product. When the temperature difference between the surface temperature of the heating area of ​​the heating carrier 1 measured by the second temperature sensing element 4 and the outlet water temperature measured by the first temperature sensing element 3 is greater than 5℃, it is judged that the scale on the inner wall of the heating carrier 1 is serious.

[0024] Example of determining whether the inner wall of heating carrier 1 has severe scaling:

[0025] A stainless steel tube with a wall thickness of 0.8 to 1.5 mm is selected as the heating carrier 1. The thermal conductivity of the ferritic stainless steel thick film substrate is about 25 W / (m·K), and the thermal conductivity of scale is about 0.5 to 2 W / (m·K).

[0026] When the heating element is working normally: the outlet water temperature T1 measured by the first temperature sensing element 3 is 95℃, and the surface temperature T2 of the heating area of ​​the heating carrier 1 measured by the second temperature sensing element 4 is 103℃; T2-T1=8℃, T2-T1>5℃, then it is judged that the inner wall of the heating carrier 1 is severely scaled;

[0027] The position of the first temperature sensing element 3 corresponds to the inlet end of the confluence channel 61, which improves the accuracy of measuring the outlet water temperature. The second temperature sensing element 4 is located at a certain water flow impact surface of the spiral guide protrusion of the guide column 5. Scale is more likely to form at the water flow impact surface of the spiral guide protrusion of the guide column 5, which further improves the accuracy of detecting scale on the inner wall of the heating carrier 1.

[0028] Furthermore, one end of the helical spring 7 is provided with a snap-fit ​​protrusion 71, and the side wall of the flow guide end cover 6 is provided with a snap-fit ​​groove that matches the snap-fit ​​protrusion 71. The snap-fit ​​protrusion 71 of the helical spring 7 is snapped into the snap-fit ​​groove, and the other end of the helical spring 7 abuts against the flow guide plug 8; the helical spring 7 is easy to disassemble and assemble.

[0029] Furthermore, the heating carrier 1 is a metal tubular substrate, and the heating circuit 2 is a film heating circuit.

[0030] The novel heating tube assembly disclosed in this embodiment measures the outlet water temperature using a first temperature sensing element 3 and the surface temperature of the heating area of ​​the heating carrier 1 using a second temperature sensing element 4. The temperature difference between the measured outlet water temperature and the surface temperature of the heating area of ​​the heating carrier 1 can be used to determine whether scale has formed on the inner wall of the heating carrier 1. The position of the first temperature sensing element 3 corresponds to the inlet end of the confluence channel 61, resulting in higher accuracy in measuring the outlet water temperature. The second temperature sensing element 4 is located at a water flow impact surface of the spiral guide protrusion of the guide column 5, where scale is more likely to form. This assembly offers high accuracy in scale detection, a simple structure, and ease of use.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel heating tube assembly, comprising a heating carrier, a flow guide end cap, and a first temperature sensing element and a second temperature sensing element for detecting scale, characterized in that: The heating carrier has heating lines on its outer wall, and the area on the outer wall corresponding to the heating lines is the heating area. The heat generated by the heating lines is transferred to the fluid to be heated in the internal flow channel of the heating carrier. The first temperature sensing element is located at the water outlet end of the outer wall of the heating carrier and is used to measure the water outlet temperature. The second temperature sensing element is located on the outer wall of the heating carrier and is located near the heating lines. It is used to measure the surface temperature of the heating area of ​​the heating carrier. The guide end cap is a cylindrical structure. The guide end cap is embedded and fixed in the water outlet end of the heating carrier. The inner end of the guide end cap is a closed structure. A merging duct is opened on the circumferential side wall of the guide end cap and communicates with the internal flow channel of the heating carrier. The merging duct is connected to the cylindrical cavity of the guide end cap. The position of the first temperature sensing element corresponds to the position of the inlet end of the merging duct.

2. The novel heating tube assembly according to claim 1, characterized in that: The water inlet end of the heating carrier is fixedly nested with a flow guide plug, and a flow guide column abuts between the flow guide plug and the flow guide end cover. A heating flow channel is formed between the flow guide column and the heating carrier, and a water inlet channel connected to the heating flow channel is opened on the flow guide plug.

3. The novel heating tube assembly according to claim 1, characterized in that: The outer circumferential wall of the guide column is provided with spiral guide protrusions.

4. A novel heating tube assembly according to claim 3, characterized in that: The second temperature sensing element is located at a certain water flow impact surface of the spiral guide protrusion of the guide column.

5. A novel heating tube assembly according to claim 3, characterized in that: A helical spring is fixedly provided on the outer circumference of the guide column, and the helical spring forms a helical guide protrusion of the guide column.

6. A novel heating tube assembly according to claim 5, characterized in that: One end of the helical spring is provided with a snap-fit ​​protrusion, and a snap-fit ​​groove adapted to the snap-fit ​​protrusion is opened on the side wall of the flow guide end cap. The snap-fit ​​protrusion of the helical spring is embedded in the snap-fit ​​groove, and the other end of the helical spring abuts against the flow guide plug.

7. A novel heating tube assembly according to claim 1, characterized in that: The heating carrier is a metal tubular substrate, and the heating circuit is a membrane heating circuit.

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