Temperature measuring probe

Abstract

The utility model relates to a temperature measuring probe, which comprises an insulating cylindrical tube, a heat conducting aluminum cover and a thermistor, the heat conducting aluminum cover is sleeved at the top end of the insulating cylindrical tube and seals the upper port of the insulating cylindrical tube, and the thermistor is arranged in the insulating cylindrical tube and is attached to or abutted against the cover surface of the heat conducting aluminum cover. Two cables of the thermistor are led out from the lower port of the insulating cylindrical tube to the outer side, the upper part of the insulating cylindrical tube is provided with a plurality of filler grooves communicated with a tube cavity of the insulating cylindrical tube, and epoxy resin is encapsulated in the plurality of filler grooves and the tube cavity; according to the temperature measuring probe, the filling groove is additionally formed in the insulating cylindrical tube, epoxy resin is filled in a tube cavity more fully, the meshing force between the insulating cylindrical tube and the heat conduction aluminum cover can be improved, connection is firmer, the hardened epoxy resin can be used for hanging the whole epoxy resin through the part filled in the filling groove, and the whole epoxy resin is not damaged. The problem that epoxy resin falls down along the smooth pipe wall of the insulating cylindrical pipe in the heating process is solved.

Description

Technical Field

[0001] This utility model relates to the field of temperature measuring probes, specifically a temperature measuring probe. Background Technology

[0002] The current temperature probe structure includes an insulating cylindrical tube, a thermally conductive aluminum cap, and a thermistor. The installation method of these three components can be referred to the preamble of the claim. The thermistor is fixed inside the insulating cylindrical tube using epoxy resin. However, it has been found that the hardened epoxy resin separates from the insulating cylindrical tube when heated, eventually causing the entire piece of epoxy resin to fall off along the smooth inner wall of the insulating cylindrical tube, resulting in damage to the temperature probe. Therefore, the applicant has improved and perfected the structure of the temperature probe to solve the problem simultaneously through structural design, so that consumers can choose to use it. Utility Model Content

[0003] The purpose of this invention is to solve the aforementioned problems and provide a temperature probe with a simple and reasonable structure.

[0004] A temperature probe includes an insulating cylindrical tube, a thermally conductive aluminum cap, and a thermistor. The thermally conductive aluminum cap is fitted onto the top of the insulating cylindrical tube and seals the upper port of the insulating cylindrical tube. The thermistor is disposed inside the insulating cylindrical tube and abuts or contacts the surface of the thermally conductive aluminum cap. Two cables of the thermistor are led outward from the lower port of the insulating cylindrical tube. The upper part of the insulating cylindrical tube has several filling grooves that communicate with its cavity. The several filling grooves and the cavity are filled with epoxy resin.

[0005] The objective of this utility model can also be achieved by the following technical measures:

[0006] As a more specific embodiment, the aforementioned filling grooves are opened within the coverage area of ​​the thermally conductive aluminum cover wall.

[0007] As a further embodiment, all of the aforementioned filling grooves penetrate the wall thickness of the insulating cylindrical tube.

[0008] As a further embodiment, the plurality of packing grooves are formed at the top of the insulating cylindrical tube, and the packing grooves form upward-opening slots.

[0009] As a further option, the filling groove is a dovetail groove structure that is narrow at the top and wide at the bottom.

[0010] As a further embodiment, the number of the packing grooves is two, and the two packing grooves are arranged on the same symmetrical line of the insulating cylindrical tube.

[0011] As a further embodiment, the middle portion of the insulating cylindrical tube extends outward to form a limiting ring portion for the limiting spring structure.

[0012] As a further embodiment, the bottom of the thermally conductive aluminum cover extends outward with a cover flange, and the cover flange and the limiting ring are spaced apart to form a limiting groove for limiting the sealing ring structure.

[0013] As a further embodiment, the upper part of the thermally conductive aluminum cover has a frustum-shaped structure, and the wall thickness of the frustum portion of the thermally conductive aluminum cover increases linearly from top to bottom.

[0014] As a further embodiment, the outer diameter of the insulating cylindrical tube is larger than the inner diameter of the cover wall of the thermally conductive aluminum cover, and the thermally conductive aluminum cover and the insulating cylindrical tube form an interference fit.

[0015] The beneficial effects of this utility model are as follows:

[0016] This utility model discloses a temperature probe. This temperature probe adds a filler groove to the insulating cylindrical tube, which makes the epoxy resin filling in the tube cavity more complete. It can also improve the interlocking force between the insulating cylindrical tube and the heat-conducting aluminum cap, making the connection more secure. The hardened epoxy resin can be held in place by the part filled in the filler groove, which solves the problem of epoxy resin falling off the smooth tube wall of the insulating cylindrical tube during the heating process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of the temperature probe in this utility model.

[0018] Figure 2 This is a schematic diagram of the insulating cylindrical tube structure in this utility model.

[0019] Figure 3 This is an exploded view of the temperature probe of this utility model. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] See Figures 1 to 3 As shown, a temperature probe includes an insulating cylindrical tube 1, a thermally conductive aluminum cover 2, and a thermistor 3. The thermally conductive aluminum cover 2 is sleeved on the top of the insulating cylindrical tube 1 and seals the upper port of the insulating cylindrical tube 1. The thermistor 3 is disposed inside the insulating cylindrical tube 1 and is attached to or abuts against the cover surface of the thermally conductive aluminum cover 2. The two cables 31 of the thermistor 3 are led out to the outside through the lower port of the insulating cylindrical tube 1.

[0022] The insulating cylindrical tube 1 has two filling grooves 4 connected to its cavity along a symmetrical line at its top end. The two filling grooves 4 have a dovetail groove structure that is narrow at the top and wide at the bottom. The filling grooves 4 form an upward-opening slot 41, and the filling grooves 4 have a cut-out structure, so they all penetrate the wall thickness of the insulating cylindrical tube 1. The two filling grooves 4 and the cavity are filled with epoxy resin 5.

[0023] This temperature probe features a filler groove 4 added to the insulating cylindrical tube 1, which allows the epoxy resin 5 to be filled more fully within the tube cavity. This also improves the interlocking force between the insulating cylindrical tube 1 and the thermally conductive aluminum cap 2, resulting in a more secure connection. The hardened epoxy resin 5 can be held in place by the portion filled in the filler groove 4 (marked as M1 in the attached diagram), preventing the epoxy resin 5 from detaching from the smooth wall of the insulating cylindrical tube 1 during heating.

[0024] In this embodiment, the thermally conductive aluminum cover 2 is made of stamped aluminum sheet. In other embodiments, the thermally conductive aluminum cover 2 can also be made of other metal materials, such as copper sheet.

[0025] The insulating cylindrical tube 1 has a limiting ring 11 extending outward from the middle part for a limiting spring structure; when the temperature probe is used in a temperature measurement system, the entire temperature probe can achieve elastic movement by inserting a spring structure into the lower part of the insulating cylindrical tube 1.

[0026] The bottom of the thermally conductive aluminum cover 2 extends outward with a cover flange 21. The cover flange 21 and the limiting ring portion 11 are spaced apart and form a limiting groove A for limiting the sealing ring structure. When the temperature probe is used in the temperature measurement system, the inner edge of the sealing ring can be limited by the limiting groove A.

[0027] The upper part of the thermally conductive aluminum cover 2 has a frustum-shaped structure, and the thickness of the cover wall of the frustum part of the thermally conductive aluminum cover 2 increases linearly from top to bottom; this reduces the thickness of the cover wall of the thermistor 3 corresponding to the thermally conductive aluminum cover 2, reduces the error in temperature transmission, and improves the accuracy of the probe's temperature sensing.

[0028] The outer diameter of the insulating cylindrical tube 1 is larger than the inner diameter of the cover wall of the thermally conductive aluminum cover 2, and the thermally conductive aluminum cover 2 and the insulating cylindrical tube 1 form an interference fit. By installing the thermally conductive aluminum cover 2 onto the insulating cylindrical tube 1 through the interference fit, the assembly efficiency can be improved. Moreover, the epoxy resin 5 overflowing from the filler groove 4 contacts the inner wall surface of the thermally conductive aluminum cover 2, which plays a certain adhesive role, making the connection more firm and stable.

[0029] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A temperature probe, comprising an insulating cylindrical tube (1), a thermally conductive aluminum cap (2), and a thermistor (3), wherein the thermally conductive aluminum cap (2) is fitted onto the top end of the insulating cylindrical tube (1) and seals the upper port of the insulating cylindrical tube (1), the thermistor (3) is disposed inside the insulating cylindrical tube (1) and abuts or contacts the cover surface of the thermally conductive aluminum cap (2), and two cables (31) of the thermistor (3) are led outwards through the lower port of the insulating cylindrical tube (1), characterized in that: The upper part of the insulating cylindrical tube (1) is provided with several filling grooves (4) that connect to its cavity, and the several filling grooves (4) and the cavity are filled with epoxy resin (5).

2. The temperature probe according to claim 1, characterized in that: The aforementioned filler grooves (4) are located within the coverage area of ​​the heat-conducting aluminum cover (2).

3. The temperature probe according to claim 2, characterized in that: The aforementioned filling grooves (4) all penetrate the wall thickness of the insulating cylindrical tube (1).

4. A temperature probe according to claim 2 or 3, characterized in that: The aforementioned packing grooves (4) are opened at the top of the insulating cylindrical tube (1), and the packing grooves (4) form an upward-opening slot (41).

5. A temperature probe according to claim 4, characterized in that: The filling groove (4) has a dovetail groove structure that is narrow at the top and wide at the bottom.

6. A temperature probe according to claim 1, characterized in that: The number of the packing grooves (4) is two, and the two packing grooves (4) are arranged on the same symmetrical line of the insulating cylindrical tube (1).

7. A temperature measuring probe according to claim 1, characterized in that: The middle part of the insulating cylindrical tube (1) extends outward to form a limiting ring (11) for the limiting spring structure.

8. A temperature probe according to claim 7, characterized in that: The bottom of the thermally conductive aluminum cover (2) extends outward with a cover flange (21), and the cover flange (21) and the limiting ring (11) are spaced apart and form a limiting groove (A) for limiting the sealing ring structure.

9. A temperature probe according to claim 1, characterized in that: The upper part of the thermally conductive aluminum cover (2) has a frustum-shaped structure, and the thickness of the cover wall of the frustum part of the thermally conductive aluminum cover (2) increases linearly from top to bottom.

10. A temperature probe according to claim 1, characterized in that: The outer diameter of the insulating cylindrical tube (1) is larger than the inner diameter of the cover wall of the thermally conductive aluminum cover (2), and the thermally conductive aluminum cover (2) and the insulating cylindrical tube (1) form an interference fit.

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