Temperature sensor for oven

Abstract

The utility model discloses a temperature sensor for an oven, and relates to the technical field of temperature sensors, the temperature sensor comprises a thermistor and a shell covering the thermistor, a Teflon tube and a first glass fiber tube, a lead part of the thermistor is sequentially sleeved with the Teflon tube and the first glass fiber tube, and the outer layers of the Teflon tube and the first glass fiber tube are coated with silicon resin layers. The glass packaging type thermistor has the technical advantages that the glass packaging type thermistor is protected by arranging the silicon resin layer, so that a glass part is not damaged when the thermal expansion heat-conducting glue is subjected to expansion packaging; the small-size transparent Teflon tube is used at the root of the glass packaging type thermistor, so that the glass at the root of the resistor can be protected from being damaged by stress when the resistor lead is pulled; the wire buckles used when the lead of the thermistor is connected with the electric wire are staggered, short circuit caused by contact of the metal wire buckles can be avoided, meanwhile, the electric wire at the tail end of the second glass fiber tube is knotted, and the second glass fiber tube can be prevented from moving.

Description

Technical Field

[0001] The present application relates to the technical field of temperature sensors, and in particular to a temperature sensor for an oven. Background Art

[0002] Temperature sensors are key components used in a wide range of fields, including industry, healthcare, and automotive. Their reliability and stability are crucial. Especially in extreme environments or complex applications, temperature sensors must provide accurate temperature measurements and possess sufficient durability to withstand these challenges. Glass-encapsulated thermistors, due to their exceptional stability and reliability, have become a crucial component in temperature measurement. Their glass encapsulation not only provides precise temperature detection but also maintains excellent performance in harsh environments, ensuring long-term stable operation in high-temperature, humid, or corrosive environments.

[0003] Glass-encapsulated thermistors are prone to damage during the manufacturing process of temperature sensors when encapsulated with thermal expansion adhesive. Traditional temperature sensors often lack effective protection measures in their design, making them susceptible to mechanical stress, environmental factors, and other factors during use, which in turn affects their measurement accuracy and service life. For example, the connection between the wire and the sensor body is often damaged by external pulling or vibration, causing short circuits or open circuits. Traditional temperature sensors are directly installed in a fixed position inside the oven using a fixing clamp or welding. Although this method is simple, it has some limitations in practical applications. The fixed installation position may not be suitable for all types of oven structures, resulting in the sensor being unable to accurately reflect the temperature distribution of the entire heating chamber. Summary of the Invention

[0004] This device provides a temperature sensor for an oven, and the specific implementation is as follows:

[0005] A temperature sensor for an oven, comprising:

[0006] The thermistor, the lead portion of which is sequentially sheathed with a Teflon tube and a first glass fiber tube, and the outer layers of both are coated with a silicone resin layer;

[0007] The cover is arranged outside the thermistor, Teflon tube and the end of the first glass fiber tube, and the connecting gap is filled with thermal expansion thermal adhesive. The silicone resin layer is arranged to prevent the thermal expansion thermal adhesive from damaging the first glass fiber tube during expansion packaging.

[0008] Based on the above technical solution, in order to improve the reliability and durability of glass-encapsulated thermistors, a layer of silicone resin is laid on the glass encapsulation part of the thermistor. This layer of silicone resin can effectively absorb stress when the thermal expansion thermal conductive adhesive expands and encapsulates, preventing the glass part from being damaged. The flexibility and temperature resistance of silicone resin make it an ideal buffer material, ensuring the safety of the glass encapsulation part during thermal expansion and contraction. A small-sized transparent Teflon tube is used to wrap the root of the thermistor. In the case of the resistor lead being pulled, the stress generated by the lead pulling is dispersed through the Teflon tube, thereby avoiding the stress from directly acting on the glass encapsulation part, preventing the glass from being broken and damaged due to external forces. The Teflon tube not only has excellent chemical stability and wear resistance, but also has good mechanical strength, which can effectively protect the core part of the thermistor.

[0009] Preferably, two lead wires are led outward from the thermistor and are covered with a first glass fiber tube, and the parts of the two lead wires passing through the shell are covered with a second glass fiber tube.

[0010] Preferably, both leads of the thermistor are connected to the plug terminals through electric wires.

[0011] Based on the above technical solution, a second glass fiber tube is placed at the junction of the lead wire and the wire. This second glass fiber tube can completely cover the junction of the lead wire and the wire, forming a protective layer. The glass fiber tube not only has excellent heat resistance and mechanical strength, but also resists chemical corrosion, effectively preventing damage to the junction of the lead wire and the wire from the external environment. This further enhances the overall reliability of the thermistor, making the glass-encapsulated thermistor not only safer and more reliable during installation and use, but also able to maintain good performance in a variety of complex environments. The junction points of the two lead wires and the wire in the thermistor are preferably staggered.

[0012] Based on the above technical solution, the staggered design of the wire buckle avoids direct contact between metal parts, effectively prevents the occurrence of short circuits, and improves the safety of the thermistor during use.

[0013] Preferably, one end of the second glass fiber tube abuts against the shell, and the other end abuts against the limiting buckle on the wire.

[0014] Based on the above technical solution, the wires at the end of the second glass fiber tube are knotted, which can prevent the second glass fiber tube from moving and thus avoid losing its insulation and protection functions.

[0015] The knotted connection at the end of the wire effectively prevents the second fiberglass tube from shifting during use, ensuring it remains firmly attached to the junction of the lead wire and the wire, providing continuous protection. This reinforced design makes the thermistor more stable and reliable during installation and use, reducing performance degradation and safety issues caused by loose or damaged connections. Application Effect: Enhanced Safety: By knotting the second fiberglass tube and the wire end, the thermistor maintains excellent electrical performance in a variety of complex environments, avoiding safety hazards caused by damage to the lead wire connection.

[0016] Preferably, the positioning plate has two structural modes, namely:

[0017] First, a positioning plate is integrated into the side of the shell, and a plurality of positioning circular holes connected to the oven bolts are opened on the positioning plate.

[0018] Secondly, a positioning plate is integrated on the side of the shell, and a positioning waist hole is opened on the positioning plate.

[0019] In summary, this application has the following beneficial technical effects:

[0020] 1. The glass-encapsulated thermistor in this utility model is protected by a silicone resin layer, so that the thermal expansion adhesive will not damage the glass part when expanding and encapsulating;

[0021] 2. The utility model uses a small transparent Teflon tube at the root of the glass-encapsulated thermistor to protect the glass at the root of the resistor from being damaged when the resistor lead is pulled;

[0022] 3. The utility model has a simple structure. The staggered wire buckle design used when connecting the thermistor lead to the wire can avoid short circuits caused by contact between the metal wire buckles. At the same time, the wires at the end of the second fiberglass tube are knotted to prevent the second fiberglass tube from moving, thereby avoiding loss of insulation and protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 This utility model Figure 1 A magnified view of the middle part of the structure;

[0025] Figure 3 It is a cross-sectional view of the structure at the location of the thermistor in the utility model;

[0026] Figure 4 This is a front view structural diagram of a modified application of the present utility model;

[0027] Figure 5 It is a front view structural diagram of the second modified application of the utility model.

[0028] Description of reference numerals:

[0029] 1. Thermistor, 2. Silicone resin layer, 3. Teflon tube, 4. First glass fiber tube, 5. Thermal expansion thermal adhesive, 6. Shell, 7. Joint, 8. Second glass fiber tube, 9. Wire, 10. Connecting terminal, 11. Limit buckle, 12. Positioning round hole, 13. Positioning plate, 14. Positioning waist hole. DETAILED DESCRIPTION

[0030] The following describes the specific implementation of the utility model with reference to the accompanying drawings and embodiments:

[0031] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present utility model. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose that can be achieved by the present utility model.

[0032] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0033] The following is combined with Figure 1-5 This application is described in further detail.

[0034] The embodiment of the present application discloses a temperature sensor for an oven.

[0035] Example 1

[0036] Reference Figures 1 to 3 This embodiment discloses a temperature sensor for an oven, including a thermistor 1 and a housing 6. The lead portion of the thermistor 1 is sequentially sleeved with a Teflon tube 3 and a first glass fiber tube 4, and the outer layers of both are coated with a silicone resin layer 2. The housing 6 is arranged to cover the ends of the thermistor 1, Teflon tube 3, and first glass fiber tube 4, and the connecting gap is filled with thermal expansion thermal adhesive 5. The silicone resin layer 2 is arranged to prevent the thermal expansion thermal adhesive 5 from damaging the first glass fiber tube 4 during expansion and packaging.

[0037] Two lead wires are led outward from the thermistor 1 and are covered with a first glass fiber tube 4. The parts of the two lead wires extending outward from the housing 6 are covered with a second glass fiber tube 8. The two lead wires of the thermistor 1 are connected to the plug-in terminal 10 through the wire 9. In this structure, the junction points of the two lead wires in the thermistor 1 and the wire 9 are arranged in a staggered manner. One end of the second glass fiber tube 8 abuts against the housing 6, and the other end abuts against the limit buckle 11 on the wire 9.

[0038] The specific implementation process is as follows: the Teflon tube 3, the first glass fiber tube 4, the thermistor 1 and the shell 6 are encapsulated by the thermal expansion thermal adhesive 5; during the expansion process of the thermal expansion thermal adhesive 5, the silicone resin layer 2 provides protection for the Teflon tube 3, the first glass fiber tube 4 and the thermistor 1; after the encapsulation is completed, the second glass fiber tube 8 is sleeved, and a knot is tied on the wire 9 to form a limit buckle 11, so that the second glass fiber tube 8 is axially limited.

[0039] Example 2

[0040] Reference Figure 4 Based on the above embodiment, this embodiment further discloses a temperature sensor for an oven. A positioning plate 13 is integrated on the side of the shell 6. The positioning plate 13 is provided with a plurality of positioning circular holes 12 connected to the oven bolts. In this structure, the positioning plate 13 and the positioning circular holes 12 match the openings on the oven, and the installation and fixation between the two are achieved by bolts.

[0041] Example 3

[0042] Reference Figure 5 Based on the above embodiment, this embodiment further discloses a temperature sensor for an oven. A positioning plate 13 is integrated on the side of the shell 6, and a positioning waist hole 14 is opened on the positioning plate 13. In this structure, the positioning plate 13 matches the opening on the oven, and in order to improve the compatibility of the positioning plate 13 with different models of ovens, its connection point can be set as a positioning waist hole 14 to improve the freedom of vertical installation.

[0043] Many other changes and modifications can be made without departing from the concept and scope of the present invention. It should be understood that the present invention is not limited to specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A temperature sensor for an oven, characterized in that: include: A thermistor (1), wherein a lead portion thereof is sequentially sheathed with a Teflon tube (3) and a first glass fiber tube (4), and both outer layers are coated with a silicone resin layer (2); A housing (6) is provided outside the ends of the thermistor (1), the Teflon tube (3) and the first glass fiber tube (4), and a gap between the connections is filled with a heat-expanding heat-conducting adhesive (5). The silicone resin layer (2) is arranged to prevent the heat-expanding heat-conducting adhesive (5) from damaging the first glass fiber tube (4) during expansion and packaging.

2. The temperature sensor for an oven according to claim 1, characterized in that: Two leads extending outward from the thermistor (1) are covered with the first glass fiber tube (4), and the portions of the two leads extending out of the housing (6) are covered with a second glass fiber tube (8).

3. The temperature sensor for an oven according to claim 2, characterized in that: The two leads of the thermistor (1) are both connected to the plug-in terminal (10) through the electric wire (9).

4. The temperature sensor for an oven according to claim 3, characterized in that: The junction points between the two leads in the thermistor (1) and the electric wire (9) are arranged in a staggered manner.

5. The temperature sensor for an oven according to claim 4, characterized in that: One end of the second glass fiber tube (8) abuts against the housing (6), and the other end abuts against the limiting buckle (11) on the electric wire (9).

6. The temperature sensor for an oven according to claim 1, characterized in that: A positioning plate (13) is integrated on the side of the shell (6), and a plurality of positioning circular holes (12) connected to oven bolts are provided on the positioning plate (13).

7. The temperature sensor for an oven according to claim 1, characterized in that: A positioning plate (13) is integrated on the side of the housing (6), and a positioning waist hole (14) is provided on the positioning plate (13).

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