An explosion-proof temperature sensor

Abstract

The utility model discloses an explosion -proof temperature sensor, it includes temperature sensor body, temperature sensor body includes ceramic shell, thermistor and encapsulation glue, thermistor sets up in ceramic shell, and is close to the front end of ceramic shell, and encapsulation glue is wrapped in thermistor outside, and fills in ceramic shell in, ceramic shell outer periphery is wrapped with foamed silica gel, and the end face of foamed silica gel is exposed to the outside of the front end of ceramic shell. The utility model mainly applies in commercial high -power heating furnace, because temperature sensor body outer periphery is wrapped with foamed silica gel, and temperature sensor only its end portion temperature sensing surface is exposed, avoids the whole to be affected by working environment transient high temperature, prevents thermistor and / or ceramic shell to be destroyed by the expansion of encapsulation material.

Description

Technical Field

[0001] This utility model relates to a temperature sensor, and more particularly to an explosion-proof temperature sensor. Background Technology

[0002] Commercial high-power electric ovens are characterized by their ability to rapidly heat the cooking pot, resulting in efficient cooking. Furthermore, to accommodate various cooking methods, the operating temperature can be adjusted to a relatively high range, suitable for stir-frying and other high-heat cooking techniques. However, electric ovens are controlled by circuitry, which requires the pot's temperature to make control decisions. Therefore, a temperature sensor is needed to collect the pot's temperature. Using a temperature sensor with a metal casing would be problematic because high temperatures can accelerate the oxidation of the metal casing material, affecting the accuracy of subsequent temperature measurements. Therefore, current commercial high-power electric ovens generally use ceramic casing temperature sensors to collect temperature information. A ceramic casing temperature sensor mainly consists of a ceramic casing, a thermistor, and a sealing compound (such as epoxy resin). The thermistor is encapsulated within the ceramic casing using the sealing compound.

[0003] Because commercial high-power electric ovens often experience instantaneous high temperatures during cooking, the encapsulating material expands rapidly, which can easily damage the ceramic shell and / or thermistor. Utility Model Content

[0004] The purpose of this invention is to provide an explosion-proof temperature sensor that is simple and reasonable in structure, easy to control, low in cost, reliable in operation, and has a long service life.

[0005] The purpose of this utility model is achieved as follows: An explosion-proof temperature sensor includes a temperature sensor body, which comprises a ceramic shell, a thermistor, and an encapsulating adhesive. The thermistor is disposed inside the ceramic shell and close to the front end of the ceramic shell. The encapsulating adhesive wraps around the thermistor and fills the ceramic shell. The outer periphery of the ceramic shell is covered with foamed silicone, and the front end of the ceramic shell protrudes beyond the end face of the foamed silicone.

[0006] The objective of this utility model can also be achieved by the following technical measures: As a more specific embodiment, the foamed silicone is in the shape of a sleeve with a central hole, and the temperature sensor body is inserted into the sleeve hole.

[0007] As a further embodiment, the foamed silicone has an axial slit on one side, the slit extending from the outer periphery of the foamed silicone to the sidewall of the sleeve hole.

[0008] As a further embodiment, the ceramic shell includes a cylindrical shell body and a front end plate. The front end plate is integrally formed with the front end of the cylindrical shell body. The outer diameter of the front end plate is larger than the outer diameter of the cylindrical shell body. The front end surface of the front end plate forms a temperature-sensing surface. The front end plate abuts against the outer side of the front end surface of the foamed silicone.

[0009] As a further embodiment, the thermistor is provided with electrodes, the outer ends of which extend from the rear end of the ceramic housing and are electrically connected to one end of a wire.

[0010] As a further embodiment, a Teflon tube is also fitted over the electrode, with both ends of the Teflon tube extending to positions close to the thermistor and close to the wire, respectively.

[0011] As a further embodiment, a heat shrink tubing is provided around the connection between the electrode and the wire.

[0012] As a further embodiment, the electrode and the wire are clamped together by a copper strip, and the other end of the wire is provided with a plug.

[0013] As a further embodiment, the outer diameter of the foamed silicone is larger than the outer diameter of the front end plate of the ceramic shell.

[0014] The beneficial effects of this utility model are as follows: (1) This utility model is mainly used in commercial high-power heating furnaces. Since the temperature sensor body is wrapped with foamed silicone, only the end temperature sensing surface of the temperature sensor is exposed, which avoids the overall influence of instantaneous high temperature in the working environment and prevents the thermistor and / or ceramic shell from being damaged by the expansion of the encapsulation material.

[0015] (2) The foamed silicone of this utility model has a slit on one side, which facilitates the installation of the temperature sensor body and the foamed silicone sleeve. In addition, it can also eliminate the stress of the foamed silicone sleeve itself during the manufacturing process.

[0016] (3) The temperature sensor body of this utility model adopts a ceramic shell, which can withstand high temperature for a long time, and the end of the shell has a wider surface area, a wider temperature-receiving surface, and a faster response speed of the thermistor. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present invention.

[0018] Figure 2 This is a top view of the structure of this utility model. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: See Figure 1 and Figure 2As shown, an explosion-proof temperature sensor includes a temperature sensor body 1. The temperature sensor body 1 includes a ceramic shell, a thermistor 11, and an encapsulating adhesive 12. The thermistor 11 is disposed inside the ceramic shell and near the front end of the ceramic shell. The encapsulating adhesive 12 wraps around the thermistor 11 and fills the interior of the ceramic shell. The outer periphery of the ceramic shell is wrapped with foamed silicone 2, and the front end of the ceramic shell protrudes beyond the end face of the foamed silicone 2. The encapsulating adhesive 12 is epoxy resin.

[0020] The foamed silicone 2 is in the shape of a sleeve with a central hole 21, and the temperature sensor body 1 is inserted into the hole 21.

[0021] The foamed silicone 2 has an axial slit 22 on one side, and the slit 22 extends from the outer periphery of the foamed silicone 2 to the side wall of the sleeve hole 21.

[0022] The ceramic shell includes a cylindrical shell body 13 and a front end plate 14. The front end plate 14 is integrally formed with the front end of the cylindrical shell body 13. The outer diameter of the front end plate 14 is larger than the outer diameter of the cylindrical shell body 13. The front end surface of the front end plate 14 forms a temperature-sensing surface. The front end plate 14 is disposed against the outside of the front end surface of the foamed silicone 2.

[0023] The thermistor 11 is provided with an electrode 111, the outer end of which extends from the rear end of the ceramic shell and is electrically connected to one end of the wire 4.

[0024] The electrode 111 is also covered with a Teflon tube 15, with the two ends of the Teflon tube 15 extending to positions close to the thermistor 11 and close to the wire 4, respectively.

[0025] A heat shrink tubing 5 is fitted around the connection between the electrode 111 and the wire 4.

[0026] The electrode 111 is clamped to the wire 4 by a copper strip 3, and the other end of the wire 4 is provided with a plug 6.

[0027] The outer diameter of the foamed silicone 2 is larger than the outer diameter of the front end plate 14 of the ceramic shell.

[0028] 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 without departing from the spirit and scope of this utility model, 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. An explosion-proof temperature sensor, comprising a temperature sensor body (1), characterized in that: The temperature sensor body (1) includes a ceramic shell, a thermistor (11) and an encapsulating adhesive (12). The thermistor (11) is disposed inside the ceramic shell and close to the front end of the ceramic shell. The encapsulating adhesive (12) is wrapped around the thermistor (11) and filled inside the ceramic shell. The outer periphery of the ceramic shell is wrapped with foamed silicone (2), and the front end of the ceramic shell is exposed outside the end face of the foamed silicone (2).

2. The explosion-proof temperature sensor according to claim 1, characterized in that: The foamed silicone (2) is in the shape of a sleeve with a central hole (21), and the temperature sensor body (1) is inserted into the hole (21).

3. The explosion-proof temperature sensor according to claim 2, characterized in that: The foamed silicone (2) has an axial slit (22) on one side, and the slit (22) extends from the outer periphery of the foamed silicone (2) to the side wall of the sleeve hole (21).

4. The explosion-proof temperature sensor according to claim 1, characterized in that: The ceramic shell includes a cylindrical shell body (13) and a front end plate (14). The front end plate (14) is integrally formed with the front end of the cylindrical shell body (13). The outer diameter of the front end plate (14) is larger than the outer diameter of the cylindrical shell body (13). The front end surface of the front end plate (14) forms a temperature-sensing surface. The front end plate (14) is abutted against the front end surface of the foamed silicone (2).

5. The explosion-proof temperature sensor according to claim 4, characterized in that: The thermistor (11) is provided with an electrode (111), the outer end of which extends from the rear end of the ceramic shell and is electrically connected to one end of the wire (4).

6. The explosion-proof temperature sensor according to claim 5, characterized in that: The electrode (111) is also covered with a Teflon tube (15), with the two ends of the Teflon tube (15) extending to positions close to the thermistor (11) and close to the wire (4), respectively.

7. The explosion-proof temperature sensor according to claim 6, characterized in that: A heat shrink tubing (5) is fitted over the connection between the electrode (111) and the wire (4).

8. The explosion-proof temperature sensor according to claim 6 or 7, characterized in that: The electrode (111) and the wire (4) are clamped together by a copper strip (3), and the other end of the wire (4) is provided with a plug (6).

9. The explosion-proof temperature sensor according to claim 4, characterized in that: The outer diameter of the foamed silicone (2) is larger than the outer diameter of the front end plate (14) of the ceramic shell.

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