Temperature sensing probe

Abstract

The temperature-sensing probe comprises a temperature-sensing element and a hollow shell, the temperature-sensing element is arranged in an inner cavity of the shell and abuts against or is attached to the head end of the shell, the lead end of the temperature-sensing element extends out of an opening in the tail end of the shell, and the head end of the shell is provided with a temperature-sensing head part which is formed by stretching upwards. A temperature sensing cavity communicated with an inner cavity of the shell is defined in the temperature sensing head, the thickness of the temperature sensing head is smaller than that of the shell, and the temperature sensing element is embedded in the temperature sensing cavity in a matched mode and abuts against or abuts against the inner wall of the temperature sensing head. The thickness of the temperature-sensing head of the temperature-sensing probe is relatively thin, so that the response time of the temperature-sensing element is shortened, the temperature-sensing reaction is more sensitive, the temperature-sensing head is small, and when the crystal of the temperature-sensing element is installed, the top of the crystal and the top end in the shell are easily attached in place and are centered at the same time, so that the installation efficiency of the temperature-sensing probe is improved.

Description

Technical Field

[0001] The utility model relates to the field of temperature sensing probes, in particular to a temperature sensing probe. Background Art

[0002] At present, the negative temperature coefficient temperature sensors (NTC for short) commonly used in the market include pointed NTC and flat NTC. Due to the structure of the pointed NTC itself, it has the advantages of fast heat transfer and rapid temperature response, and is widely used in health pots and tea makers. However, the pointed NTC is easy to scratch the inside of the pot and is not easy to clean; the flat NTC is to wrap the NTC in a metal shell. The metal shell is formed by stamping a metal sheet during processing, so that the overall thickness of the metal shell is uniform, resulting in slow heat transfer of the metal shell, long response time and hysteresis of the NTC, so that there is serious hysteresis in the detection temperature, and the temperature cannot be accurately controlled during the heating process, resulting in the water temperature not meeting the ideal requirements. Therefore, the applicant provides a new temperature sensing probe solution for consumers to choose and use by improving and perfecting the existing technology. Summary of the invention

[0003] The utility model aims to provide a temperature sensing probe with simple and reasonable structure, convenient installation and stable structure.

[0004] A temperature sensing probe comprises a temperature sensing element and a shell with a hollow interior, wherein the temperature sensing element is placed in an inner cavity of the shell and abuts against or leans against the head end of the shell, a lead end of the temperature sensing element extends out from a tail end opening of the shell, the head end of the shell is provided with a temperature sensing head which is stretched upward, the interior of the temperature sensing head defines a temperature sensing cavity which is connected to the inner cavity of the shell, wherein the thickness of the temperature sensing head is smaller than the thickness of the shell, the temperature sensing element is adapted to be embedded in the temperature sensing cavity and abuts against or leans against the inner wall of the temperature sensing head.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific solution, the front end of the shell is provided with a disc portion connected to the temperature sensing head, and the joint between the disc portion and the temperature sensing head is provided with an arc-shaped transition surface.

[0007] As a further solution, the disc portion is provided with a step surface facing upward, and the step surface is inclined from inside to outside.

[0008] As a further solution, the shell is cylindrical, and a screw thread portion is provided on the outer wall surface of the shell along its length direction, the screw thread portion is arranged below the disc portion, and a wash edge is provided on the opposite side of the screw thread portion.

[0009] As a further solution, a water-isolating groove is provided on the bottom surface of the disc portion, a waterproof silicone ring is sleeved on the outer wall surface of the shell, and the waterproof silicone ring is embedded in the water-isolating groove.

[0010] As a further solution, the temperature sensing head is extended and formed along the axial direction of the shell, and the diameter of the temperature sensing head is smaller than the diameter of the shell, and an introduction slope is provided between the temperature sensing cavity and the inner cavity of the shell.

[0011] As a further solution, the temperature sensing element is fixedly packaged in the inner cavity of the housing by means of a sealing material; the sealing material is epoxy resin or a solid silicone block.

[0012] As a further solution, the thickness of the temperature sensing head is H, and 0.2mm≤θ≤1mm°

[0013] As a further solution, the slope angle of the step surface is θ, and 0<θ≤3°.

[0014] As a further solution, the shell and the temperature sensing head are integrally formed by extrusion molding of metal materials.

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

[0016] The utility model discloses a temperature sensing probe. The temperature sensing head of the temperature sensing probe is relatively thin, so that the response time of the temperature sensing element is shortened and the temperature sensing reaction is more sensitive. In addition, the temperature sensing head is small. When the crystal of the temperature sensing element is installed, the top of the crystal and the top of the inner part of the shell are easy to fit in place and centered at the same time, thereby improving the installation efficiency of the temperature sensing probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the utility model.

[0018] Figure 2 It is a schematic diagram of the edge washing structure in the utility model.

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the temperature sensing probe of the utility model when epoxy resin is poured. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] like Figures 1 to 3As shown, a temperature sensing probe comprises a temperature sensing element 1 and a shell 2 with a hollow interior, wherein the temperature sensing element 1 is placed in an inner cavity 201 of the shell and abuts against or leans against the head end of the shell 2, a lead end 3 of the temperature sensing element 1 extends out from a tail end opening of the shell 2, and an upwardly stretched temperature sensing head 4 is provided at the head end of the shell 2, wherein the interior of the temperature sensing head 4 defines a temperature sensing cavity 401 connected to the inner cavity 201 of the shell, wherein the thickness of the temperature sensing head 4 is less than the thickness of the shell 2, and the temperature sensing element 1 is adapted to be embedded in the temperature sensing cavity 401 and abuts against or leans against the inner wall of the temperature sensing head 4.

[0022] The temperature sensing head of this temperature sensing probe 4 is relatively thin, which shortens the response time of the temperature sensing element 1 and makes the temperature sensing reaction more sensitive. In addition, the temperature sensing head 4 is small, and when the crystal of the temperature sensing element 1 is installed, the top of the crystal and the top of the inner part of the shell 2 are easy to fit in place and centered at the same time, thereby improving the installation efficiency of the temperature sensing probe.

[0023] The front end of the housing 2 is provided with a disc portion 5 connected to the temperature sensing head 4 , and an arc-shaped transition surface 501 is provided at the joint between the disc portion 5 and the temperature sensing head 4 ; the disc portion 5 can play a limiting role during installation.

[0024] The disc portion 5 is provided with an upward step surface 502, and the step surface 502 is inclined from the inside to the outside; the inclined step surface 502 is combined with the arc-shaped transition surface 501, and the inclined surface is not easy to hide water, so that there will be no water marks on the surface of the shell 2.

[0025] The shell 2 is cylindrical, and a screw thread portion 6 is provided on the outer wall surface of the shell 2 along its length direction. The screw thread portion 6 is arranged below the disc portion 5, and a wash edge 7 is provided at the opposite side of the shell 2. A wash edge 7 is provided on the screw thread portion 6, so that the shell 2 has a guide position for easy installation, does not slip when tightening the screws, and saves work time.

[0026] A water-proof groove 503 is formed on the bottom surface of the disc portion 5, and a waterproof silicone ring 8 is sleeved on the outer wall surface of the shell 2, and the waterproof silicone ring 8 is embedded in the water-proof groove 503. When the temperature sensing probe is used in scenes such as wading and heating, it has good sealing and waterproof functions.

[0027] The temperature sensing head 4 is extended and formed along the axial direction of the shell 2, and the diameter of the temperature sensing head 4 is smaller than the diameter of the shell 2. An introduction slope 202 is provided between the temperature sensing cavity 401 and the inner cavity 201 of the shell. During installation, when the temperature sensing element 1 is placed through the tail end opening of the shell 2, the crystal of the temperature sensing element 1 automatically slides into the temperature sensing cavity 401 through the introduction slope 202, so that the top of the crystal and the top of the inner part of the shell 2 are easily fitted in place and centered at the same time, which can improve the assembly efficiency.

[0028] The temperature sensing element 1 is fixedly packaged in the inner cavity 201 of the shell by a sealing material; in the present embodiment, the sealing material is epoxy resin 9. After the temperature sensing element 1 is installed in place, the epoxy resin 9 is poured into the inner cavity 201 of the shell to fix the assembly position of the temperature sensing element 1.

[0029] In more embodiments, the temperature sensing element 1 may be first fixed on a solid silicone block, and then installed in the temperature sensing cavity 401 when the temperature sensing element 1 is inserted into the housing inner cavity 201 along with the solid silicone block.

[0030] The thickness of the temperature sensing head is H, and 0.2mm≤θ≤1mm°. In the present embodiment, the thickness of the temperature sensing head is about 0.4mm. Meanwhile, the diameter of the temperature sensing cavity 401 is about 2mm, and the crystal diameter of the temperature sensing element 1 is about 1.2mm.

[0031] The slope angle of the step surface 502 is θ, and 0<θ≤3°. In the present embodiment, the slope angle of the step surface 502 is about 2°.

[0032] The housing 2 and the temperature sensing head 4 are integrally formed by press forming of metal materials. The integral press forming has a simple structure and high processing efficiency. The threaded portion 6 and the edge wash 7 are processed after the press forming.

[0033] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A temperature sensing probe, comprising a temperature sensing element (1) and a hollow shell (2), wherein the temperature sensing element (1) is placed in an inner cavity (201) of the shell and abuts or rests against the head end of the shell (2), and a lead end (3) of the temperature sensing element (1) extends out from a rear end opening of the shell (2), characterized in that: The head end of the shell (2) is provided with a temperature sensing head (4) which is stretched upward, and the interior of the temperature sensing head (4) defines a temperature sensing cavity (401) which is connected to the inner cavity (201) of the shell, wherein the thickness of the temperature sensing head (4) is smaller than the thickness of the shell (2), and the temperature sensing element (1) is adapted to be embedded in the temperature sensing cavity (401) and abuts against or rests against the inner wall of the temperature sensing head (4).

2. A temperature sensing probe according to claim 1, characterized in that: A disc portion (5) connected to the temperature sensing head (4) is provided at the head end of the housing (2), and an arc-shaped transition surface (501) is provided at the joint between the disc portion (5) and the temperature sensing head (4).

3. A temperature sensing probe according to claim 2, characterized in that: The disc portion (5) is provided with a stepped surface (502) facing upwards, and the stepped surface (502) is arranged to be inclined from the inside to the outside.

4. A temperature sensing probe according to claim 2, characterized in that: The outer shell (2) is cylindrical, and a screw thread portion (6) is provided on the outer wall surface of the outer shell (2) along its length direction. The screw thread portion (6) is arranged below the disc portion (5), and a wash edge (7) is provided on the opposite side of the screw thread portion (6).

5. A temperature sensing probe according to claim 2, characterized in that: The bottom surface of the disc portion (5) is provided with a water-isolating groove (503), the outer wall surface of the housing (2) is sleeved with a waterproof silicone ring (8), and the waterproof silicone ring (8) is embedded in the water-isolating groove (503).

6. The temperature sensing probe according to claim 1, characterized in that: The temperature sensing head (4) is extended and formed along the axial direction of the outer shell (2), and the diameter of the temperature sensing head (4) is smaller than the diameter of the outer shell (2). An introduction slope (202) is provided between the temperature sensing cavity (401) and the inner cavity (201) of the outer shell.

7. The temperature sensing probe according to claim 1, characterized in that: The temperature sensing element (1) is fixedly packaged in the inner cavity (201) of the housing by means of a sealing material; the sealing material is an epoxy resin (9) or a solid silica gel block.

8. The temperature sensing probe according to claim 1, characterized in that: The thickness of the temperature sensing head is H, and 0.2mm≤θ≤1mm°.

9. The temperature sensing probe according to claim 3, characterized in that: The slope angle of the step surface (502) is θ, and 0<θ≤3°.

10. The temperature sensing probe according to claim 1, characterized in that: The housing (2) and the temperature sensing head (4) are integrally formed by extrusion molding of metal materials.

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