Temperature sensing element and protection controller

Abstract

The utility model provides a temperature sensing element and a protection controller, and the temperature sensing element comprises a diaphragm capsule seat which is used for being connected with a temperature controller; one end of the capillary tube is connected with the diaphragm capsule seat, the capillary tube comprises a connecting tube and two or more temperature sensing units which are arranged on the connecting tube in series, and each temperature sensing unit is of a bent structure integrally formed with the connecting tube. Due to the fact that the contact area of the bending structure is large, the temperature change of the two or more heating bodies or areas can be sensed through the outer surface area of the bending structure, the bending structure integrally formed with the connecting pipe replaces a temperature sensing cylinder, the temperature sensing function is achieved, the bending process of the bending structure is simple, and the production cost is conveniently reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of overheat protection devices, in particular to a temperature sensing element and a protection controller. Background Art

[0002] Currently, traditional overheat protection controllers used on electric water heaters or other heaters can only be applied to a single heating element or a single zone. If multiple heating elements or multiple zones need to be controlled simultaneously, multiple thermal cutouts are required to control each heating element or zone separately, which takes up a lot of space and is costly.

[0003] A Chinese utility model with publication number CN206300357U discloses an overheating protection controller with dual temperature-sensing heads, comprising a switch, a membrane shell, and two or more temperature-sensing cylinders. The controller is characterized in that a concave diaphragm is provided in the membrane shell, each temperature-sensing cylinder is filled with the same working fluid, and one end of each temperature-sensing cylinder is connected to a tank filling pipe, and the other end is connected to the membrane shell through a capillary tube and is provided at the bottom of the diaphragm. When the temperature sensed by any temperature-sensing cylinder 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.

[0004] The above-mentioned overheat protection controller senses temperature changes through a temperature-sensing tube. However, the temperature-sensing tube needs to be formed and welded to the capillary tube, and the assembly process is time-consuming and labor-intensive, resulting in high costs. Utility Model Content

[0005] Based on this, in order to solve the problem that the assembly process of the temperature sensing tube in the existing overheat protection controller is time-consuming, labor-intensive and costly, the utility model provides a temperature sensing element and a protection controller, and its specific technical solutions are as follows:

[0006] A temperature sensing element, comprising:

[0007] Capsule seat, used for connecting with the thermostat;

[0008] A capillary tube, one end of which is connected to the membrane box seat, comprises a connecting tube and two or more temperature sensing units arranged in series on the connecting tube, wherein the temperature sensing unit is a bending structure integrally formed with the connecting tube.

[0009] The above-mentioned temperature sensing element, due to the large contact area of ​​the bent structure, can sense the temperature changes of two or more heating bodies or areas through the surface area of ​​the bent structure, thereby replacing the temperature sensing tube by the bent structure integrally formed with the connecting pipe to achieve the temperature sensing function. The bending process of the bent structure is simple, which is convenient for reducing production costs.

[0010] Furthermore, the bending structure includes a bent tube body that is folded in half.

[0011] Furthermore, the bending structure includes a spirally bent spiral tube.

[0012] Furthermore, the bending structure also includes a vertical tube passing through the spiral tube.

[0013] Furthermore, the number of spiral turns of the spiral tube is greater than 10 turns.

[0014] Furthermore, the connecting pipe is covered with a protective layer.

[0015] Furthermore, the capillary tube includes two temperature sensing units.

[0016] In another aspect, a protection controller includes a thermostat and a temperature sensing element. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but rather the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0018] Figure 1 This is a schematic diagram of the structure of the temperature sensing element according to an embodiment of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the temperature sensing element according to an embodiment of the present invention. Figure 2 ;

[0020] Figure 3 It is a structural diagram of a controller protected by an embodiment of the present utility model.

[0021] Description of reference numerals:

[0022] 1. Capsule seat; 2. Capillary tube; 3. Bending structure; 4. Thermostat; 5. Temperature sensing element;

[0023] 21. Connecting pipe; 22. Temperature sensing unit;

[0024] 31. Curved tube; 32. Spiral tube; 33. Vertical tube. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

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

[0028] The "first" and "second" in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0029] On the one hand, if Figure 1 As shown, a temperature sensing element in one embodiment of the present invention includes:

[0030] Capsule seat 1, used for connecting with the thermostat;

[0031] One end of the capillary tube 2 is connected to the membrane box seat 1. The capillary tube 2 includes a connecting tube 21 and two or more temperature sensing units 22 arranged in series on the connecting tube 21. The temperature sensing unit 22 is a bending structure 3 integrally formed with the connecting tube 21.

[0032] The above-mentioned temperature sensing element, due to the large contact area of ​​the bending structure 3, can sense the temperature changes of two or more heating bodies or areas through the surface area of ​​the bending structure 3, thereby replacing the temperature sensing tube by the bending structure 3 integrally formed with the connecting tube 21 to achieve the temperature sensing function. The bending process of the bending structure 3 is simple, which is convenient for reducing production costs.

[0033] In one embodiment, the bending structure 3 includes a bent tube body 31 that is folded in half. In this way, the bending process of the bent tube body 31 is simple, which is convenient for reducing production costs.

[0034] like Figure 2 As shown, in one embodiment, the bending structure 3 includes a spirally bent spiral tube 32. In this way, the outer contact area of ​​the spirally bent spiral tube 32 is large, which is convenient for improving the temperature sensing effect.

[0035] In one embodiment, the bending structure 3 further includes a vertical tube 33 passing through the spiral tube 32. In this way, by passing the vertical tube 33 through the spiral tube 32, the occupied area of ​​the bending structure 3 can be saved and the applicability can be improved.

[0036] In one embodiment, the number of spiral turns of the spiral tube 32 is greater than 10. Thus, by limiting the number of spiral turns of the spiral tube 32, the outer surface area of ​​the bending structure 3 can be guaranteed, thereby ensuring the temperature sensing effect of the bending structure 3.

[0037] In one embodiment, the connecting tube 21 is covered with a protective layer. Specifically, the protective layer is a thermal insulation layer. This layer isolates heat transfer between the connecting tube 21 and the non-detection area, reducing the impact of non-heating elements or non-detection areas on the temperature sensing element, thereby ensuring the overall temperature sensing effect of the temperature sensing element.

[0038] In one embodiment, the capillary tube 2 includes two temperature sensing units 22 .

[0039] On the other hand, Figure 1 As shown, a protection controller in one embodiment of the present invention includes a thermostat 4 and a temperature sensing element 5. Specifically, the thermostat 4 includes a switch and a membrane housing. The membrane housing is provided with a concave diaphragm. The capillary tubes 2 are filled with a working fluid. The capillary tubes 2 are connected to the membrane housing and are located at the bottom of the diaphragm. When the temperature sensed by any temperature sensing unit 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 actuating the switch and cutting off the power supply.

[0040] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0041] The above-described embodiments merely represent several implementations of the present invention. 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 a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A temperature sensing element, characterized in that: include: A membrane box seat (1) is used for connecting with a temperature controller; A capillary tube (2) is connected to the membrane box seat (1) at one end. The capillary tube (2) includes a connecting tube (21) and two or more temperature sensing units (22) arranged in series on the connecting tube (21). The temperature sensing unit (22) is a bending structure (3) integrally formed with the connecting tube (21).

2. A temperature sensing element according to claim 1, characterized in that: The bending structure (3) comprises a bent tube (31) that is folded in half.

3. The temperature sensing element according to claim 1, characterized in that: The bending structure (3) comprises a helical tube (32) that is helically bent.

4. A temperature sensing element according to claim 3, characterized in that: The bending structure (3) further comprises a vertical tube (33) passing through the spiral tube (32).

5. The temperature sensing element according to claim 3, characterized in that: The number of spiral turns of the spiral tube (32) is greater than 10.

6. The temperature sensing element according to claim 1, characterized in that: The connecting pipe (21) is covered with a protective layer.

7. The temperature sensing element according to claim 1, characterized in that: The capillary tube (2) includes two temperature sensing units (22).

8. A protection controller, characterized in that: The invention comprises a thermostat and a temperature sensing element according to any one of claims 1 to 7.

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