Temperature sensing structure and protection controller

Abstract

This invention provides a temperature sensing structure and protection controller, comprising a diaphragm housing and a capillary tube. The capillary tube includes a connecting tube and one or more temperature sensing units arranged in series. The temperature sensing units are mounted on and communicate with the connecting tube, and are integrally formed with the connecting tube. One end of the connecting tube communicates with the diaphragm housing, and the other end of the connecting tube is sealed to form a plug. This invention solves the problems of complex manufacturing processes and high costs associated with traditional overheat protection controllers. This invention offers the advantages of simple structure, simple manufacturing process, and low cost.

Description

Technical Field

[0001] This utility model relates to a thermal protection device, specifically, to a temperature sensing structure and a protection controller. Background Technology

[0002] Currently, overheat protection controllers are commonly used for temperature feedback and control in electric water heaters or other heaters. As disclosed in Chinese Utility Model Publication No. CN206300357U, a dual-sensor overheat protection controller includes a switch, a diaphragm housing, and two or more sensing cylinders. The diaphragm housing contains a concave diaphragm, and each sensing cylinder is filled with the same working fluid. One end of each sensing cylinder is connected to a filling pipe, and the other end is connected to the diaphragm housing via a capillary tube and positioned at the bottom of the diaphragm. When the temperature sensed by any sensing cylinder reaches the set temperature, the saturated vapor pressure generated by the working fluid pushes the concave diaphragm upwards, causing it to snap, thereby actuating the switch and cutting off the power.

[0003] However, the manufacturing process of the aforementioned overheat protection controller is complex and the cost is high. Therefore, it is necessary to develop a new temperature sensing structure to solve the problems of complex manufacturing process and high cost of traditional overheat protection controllers. Utility Model Content

[0004] Therefore, in order to solve the problems of complex manufacturing process and high cost of traditional overheat protection controllers, this utility model provides a temperature sensing structure and protection controller, the specific technical solution of which is as follows:

[0005] A temperature-sensing structure, comprising:

[0006] Membrane holder;

[0007] The capillary tube includes a connecting tube and one or more temperature sensing units arranged in series. The temperature sensing units are installed on and communicate with the connecting tube. The temperature sensing units and the connecting tube are integrally formed. One end of the connecting tube communicates with the diaphragm seat, and the other end of the connecting tube is sealed to form a plug.

[0008] The aforementioned temperature-sensing structure includes a diaphragm housing for connection to a thermostat; and one or more temperature-sensing units arranged in series to detect temperature changes in single or multiple heating elements or areas. Furthermore, the temperature-sensing unit and connecting tube are integrally formed, replacing the traditional temperature-sensing cylinder, resulting in a simpler manufacturing process and lower cost. Notably, the other end of the connecting tube, away from the diaphragm housing, is sealed, forming a plug. Compared to the sealing method of traditional temperature-sensing cylinders, the plug of this connecting tube is an extension of the connecting tube, eliminating the need for additional materials to seal the end away from the diaphragm housing. Therefore, its manufacturing process is simpler and its cost is lower.

[0009] Furthermore, both the temperature sensing unit and the connecting tube are made of stainless steel.

[0010] Furthermore, the outer contour of the sealing part is square.

[0011] Furthermore, the length L of the sealing part is 6mm to 15mm; the width W of the sealing part is 0.4mm to 0.9mm; and the thickness H of the sealing part is 0.4mm to 0.9mm.

[0012] Furthermore, the temperature sensing unit is a bent structure integrally formed with the connecting pipe.

[0013] Furthermore, the temperature sensing unit is a spiral tube structure integrally formed with the connecting tube.

[0014] Furthermore, the length T of the spiral tube structure is 45mm to 70mm; the outer diameter D1 of the spiral tube structure is 5mm to 7mm; and the inner diameter D2 of the spiral tube structure is 3mm to 5mm.

[0015] Furthermore, the sealing section includes a transition section and a sealing section; one end of the transition section is connected to the connecting pipe, and the other end of the transition section is connected to the sealing section. The transition section, the sealing section, and the connecting pipe are integrally formed.

[0016] Furthermore, the spiral tube structure has more than 10 spiral turns.

[0017] A protection controller includes a temperature controller and the aforementioned temperature sensing structure, wherein the temperature sensing structure is connected to the temperature controller. Attached Figure Description

[0018] The present invention can be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale; rather, the focus is on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0019] Figure 1This is a schematic diagram of the temperature sensing structure according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A schematic diagram of the structure of A in the middle;

[0021] Figure 3 This is a schematic diagram of the front view of the temperature sensing structure according to an embodiment of the present invention;

[0022] Figure 4 This is a side view of the spiral tube structure of the temperature-sensing structure according to an embodiment of the present invention.

[0023] Figure 5 This is a side view of the bent structure of the temperature-sensing structure according to an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Membrane holder; 2. Capillary tube; 21. Connecting tube; 22. Temperature sensing unit; 23. Sealing section; 231. Transition section; 232. Sealing section. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit its scope of protection.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] In this utility model, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0030] like Figures 1-4As shown, a temperature sensing structure in one embodiment of the present invention includes a diaphragm housing 1 and a capillary tube 2; the capillary tube 2 includes a connecting tube 21 and one or more temperature sensing units 22 arranged in series, the temperature sensing unit 22 is installed on the connecting tube 21 and communicates with the connecting tube 21, the temperature sensing unit 22 and the connecting tube 21 are integrally formed, one end of the connecting tube 21 communicates with the diaphragm housing 1, and the other end of the connecting tube 21 is sealed and forms a sealing part 23.

[0031] The aforementioned temperature-sensing structure includes a diaphragm holder 1 for connection to a thermostat; and one or more temperature-sensing units 22 arranged in series to sense temperature changes in one or more heating elements or areas. Furthermore, the temperature-sensing unit 22 is integrally formed with the connecting tube 21, replacing the traditional temperature-sensing cylinder, resulting in a simpler manufacturing process and lower cost. Notably, the other end of the connecting tube 21, away from the diaphragm holder 1, is sealed and forms a plug 23. Compared to the sealing method of a traditional temperature-sensing cylinder, the plug 23 of this connecting tube 21 is an extension of the connecting tube 21, eliminating the need for additional materials to seal the end of the connecting tube 21 away from the diaphragm holder 1. Therefore, its manufacturing process is simpler and its cost is lower.

[0032] Furthermore, it should be noted that the end of the connecting tube 21 furthest from the diaphragm housing 1 is sealed with a resistance welding process to form a plug 23. Compared to the traditional end sealing method of the connecting tube 21, which uses manual flame welding and requires additional materials to seal the end of the connecting tube 21, resistance welding can be performed using automated welding equipment. Therefore, the sealing method of the end of the connecting tube 21 furthest from the diaphragm housing 1 in this temperature-sensing structure is not only simple in process and low in cost, but also replaces manual labor.

[0033] like Figures 1-4 As shown, in one embodiment, the number of temperature sensing units is one and it is a spiral tube structure.

[0034] In one embodiment, both the temperature sensing unit 22 and the connecting tube 21 are made of stainless steel. Compared to traditional methods where both the temperature sensing unit 22 and the connecting tube 21 are made of copper, the temperature sensing unit 22 and the connecting tube 21 of this invention have lower manufacturing costs.

[0035] In one embodiment, the outer diameter of the connecting pipe 21 is 1.2 mm to 1.6 mm.

[0036] like Figure 2As shown, in one embodiment, the outer contour of the blocking portion 23 is square. Specifically, the length L of the blocking portion 23 is 6mm to 15mm; the width W of the blocking portion 23 is 0.4mm to 0.9mm; and the thickness H of the blocking portion 23 is 0.4mm to 0.9mm.

[0037] like Figure 5 As shown, in one embodiment, the temperature sensing unit 22 is a bent structure integrally formed with the connecting tube 21. Specifically, the bent structure is a bent tube body that is fitted together in half. This simplifies the bending process of the fitted bent tube body and helps reduce production costs.

[0038] Specifically, due to the large contact area of ​​the bending structure, it can sense the temperature changes of two or more heating elements or regions through the outer surface area of ​​the bending structure. Thus, the bending structure integrally formed with the connecting pipe 21 replaces the traditional temperature sensing cylinder to achieve the temperature sensing function. The bending process of the bending structure is simple and facilitates the reduction of production costs.

[0039] like Figure 1 and Figure 3 As shown in one embodiment, the temperature sensing unit 22 is a spiral tube structure integrally formed with the connecting tube 21. This results in a large contact area on the outer surface of the spiral tube structure, which improves the temperature sensing effect. Furthermore, the spiral tube structure has a simple manufacturing process, which helps reduce production costs.

[0040] like Figure 3 and Figure 4 As shown, in one embodiment, the length T of the spiral tube structure is 45mm to 70mm; the outer diameter D1 of the spiral tube structure is 5mm to 7mm; and the inner diameter D2 of the spiral tube structure is 3mm to 5mm.

[0041] like Figure 2 As shown, in one embodiment, the sealing section 23 includes a transition section 231 and a sealing section 232; one end of the transition section 231 is connected to the connecting pipe 21, and the other end of the transition section 231 is connected to the sealing section 232. The transition section 231, the sealing section 232 and the connecting pipe 21 are integrally formed.

[0042] In one embodiment, the spiral tube structure has more than 10 spiral turns. Thus, by limiting the number of spiral turns, the outer surface area of ​​the spiral tube structure can be guaranteed, thereby ensuring the temperature-sensing effect of the spiral tube structure.

[0043] In one embodiment, the connecting pipe 21 is covered with a protective layer. Specifically, the protective layer is a heat-insulating layer. In this way, the protective layer isolates the connecting pipe 21 from the non-detection area, reducing the impact of the non-heating element or non-detection area on the temperature sensing element, thereby ensuring the overall temperature sensing effect of the temperature sensing element.

[0044] On the other hand, a protection controller in one embodiment of this utility model includes a thermostat (not shown in the figure) and a temperature sensing element. Specifically, the thermostat includes a switch and a diaphragm housing. The diaphragm housing has a concave diaphragm. The capillary tubes 2 are filled with working fluid. The capillary tubes 2 are connected to the diaphragm housing and are located at the bottom of the diaphragm. When the temperature sensed by any one of the temperature sensing units 22 reaches the set temperature, the saturated vapor pressure generated by the working fluid pushes the concave diaphragm upward, causing the diaphragm to jump, thereby pushing the switch and cutting off the power supply.

[0045] The thermostat, switch, diaphragm housing, and working fluid are all existing technologies and will not be described in detail here.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0047] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A temperature-sensing structure, characterized in that, include: Membrane holder; The capillary tube includes a connecting tube and one or more temperature sensing units arranged in series. The temperature sensing units are installed on and communicate with the connecting tube. The temperature sensing units and the connecting tube are integrally formed. One end of the connecting tube communicates with the diaphragm seat, and the other end of the connecting tube is sealed to form a plug.

2. The temperature-sensing structure according to claim 1, characterized in that, The temperature sensing unit and the connecting tube are both made of stainless steel.

3. The temperature-sensing structure according to claim 1, characterized in that, The outer contour of the sealing part is square.

4. The temperature-sensing structure according to claim 2, characterized in that, The length L of the sealing part is 6mm to 15mm; the width W of the sealing part is 0.4mm to 0.9mm; and the thickness H of the sealing part is 0.4mm to 0.9mm.

5. The temperature-sensing structure according to claim 1 or 2, characterized in that, The temperature sensing unit is a bent structure integrally formed with the connecting pipe.

6. The temperature-sensing structure according to claim 1 or 2, characterized in that, The temperature sensing unit is a spiral tube structure integrally formed with the connecting tube.

7. The temperature-sensing structure according to claim 6, characterized in that, The length T of the spiral tube structure is 45mm to 70mm; the outer diameter D1 of the spiral tube structure is 5mm to 7mm; and the inner diameter D2 of the spiral tube structure is 3mm to 5mm.

8. The temperature-sensing structure according to claim 1 or 2, characterized in that, The sealing section includes a transition section and a sealing section; one end of the transition section is connected to the connecting pipe, and the other end of the transition section is connected to the sealing section. The transition section, the sealing section, and the connecting pipe are integrally formed.

9. The temperature-sensing structure according to claim 6, characterized in that, The spiral tube structure has more than 10 spiral turns.

10. A protection controller, characterized in that, It includes a thermostat and a temperature sensing structure as described in any one of claims 1 to 9, wherein the temperature sensing structure is connected to the thermostat.

Images