阅读说明：本技术 一种温度传感器及其制造方法 (Temperature sensor and manufacturing method thereof ) 是由 高恒瑞 李灌峰 于 2021-08-27 设计创作，主要内容包括：一种温度传感器,包括线缆,探针,手柄,所述线缆包括由多根导线构成的导线束,所述多根导线相互电绝缘,所述线缆的一端包括第一段部和第二段部,在所述第一段部,所述导线束的外部设置有绝缘外皮,在第二段部,导线束外部不设置绝缘外皮；所述探针包括外壳,内部中空,其特征在于,还包括弯管,所述弯管与探针固定连接,所述线缆的第一段部和第二段部的分界位置P位于所述弯管内,所述第一段部位于探针外壳外,所述第二段部的导线束的至少一部分长度位于所述探针外壳内,所述探针具有一个或多个测温点,所述测温点由导线裸露其金属部形成,所述弯管的至少一部分被所述手柄包裹。(A temperature sensor comprises a cable, a probe and a handle, wherein the cable comprises a conductor bundle consisting of a plurality of conductors, the conductors are mutually electrically insulated, one end of the cable comprises a first section part and a second section part, an insulating sheath is arranged outside the conductor bundle in the first section part, and the insulating sheath is not arranged outside the conductor bundle in the second section part; the probe comprises a shell and a hollow inner part, and is characterized by further comprising a bent pipe, wherein the bent pipe is fixedly connected with the probe, the dividing position P of a first section part and a second section part of the cable is positioned in the bent pipe, the first section part is positioned outside the shell of the probe, at least one part of the length of a wire bundle of the second section part is positioned in the shell of the probe, the probe is provided with one or more temperature measuring points, the temperature measuring points are formed by exposing metal parts of the wires, and at least one part of the bent pipe is wrapped by the handle.)

1. A temperature sensor comprises a cable (10), a probe and a handle (1), wherein the cable (10) comprises a conductor bundle consisting of a plurality of conductors (4, 5 and 6), the conductors (4, 5 and 6) are mutually electrically insulated, one end of the cable comprises a first section part and a second section part, an insulating sheath is arranged outside the conductor bundle in the first section part, and an insulating sheath is not arranged outside the conductor bundle in the second section part; the probe comprises a shell (3) and is hollow inside, and is characterized by further comprising an elbow (2), wherein the elbow (2) is fixedly connected with the probe (3), the dividing position P of a first section part and a second section part of the cable (10) is located in the elbow (2), the first section part is located outside the probe shell (3), at least part of the length of a wire bundle of the second section part is located in the probe shell (3), the probe is provided with one or more temperature measuring points (7, 8), the temperature measuring points (7, 8) are formed by exposing metal parts of wires, and at least part of the elbow (2) is wrapped by the handle (1).

2. A temperature sensor according to claim 1, wherein a portion of the probe housing (3) is located within the elbow (2) and extends within the elbow (2), the probe housing (3) and the elbow (2) being fixedly connected by interference fit or by riveting or welding.

3. A temperature sensor according to claim 1, wherein the elbow (2) is integrally formed with the probe housing (3).

4. The temperature sensor according to claim 2, wherein the two ends of the elbow (2) are a probe access end a and a cable access end B, respectively, the probe housing (3) enters the elbow (2) from the probe access end a for a certain length, the first section of the cable (10) is inserted into the elbow (2) from the cable access end B for a certain length, and the handle (1) wraps the part of the first section of the cable outside the cable access end B, the whole elbow (2) and the part of the probe housing outside the probe access end a.

5. The temperature sensor according to claim 2, wherein the two ends of the elbow (2) are a probe access end a and a cable access end B, respectively, the probe housing (3) enters the elbow (2) from the probe access end a and crosses over the bent portion of the elbow, extends in the elbow (2) with the end close to the cable access end B, the first section of the cable (10) is inserted into the elbow (2) from the cable access end B for a certain length and is kept outside the probe housing (3), the handle (1) wraps the first section of the partial cable outside the cable access end B, and the elbow (2) extends from the cable access end B to the vicinity of the probe access end a, that is, the handle (1) does not wrap the elbow (2) completely, and the length of the partial elbow is outside the handle (1).

6. The temperature sensor according to claim 2, wherein the two ends of the elbow (2) are a probe access end a and a cable access end B, respectively, the probe housing (3) enters the elbow (2) from the probe access end a and crosses the bent portion of the elbow in the elbow (2), extends inside the elbow (2) with the end close to the cable access end B, the first section of the cable (10) is inserted into the elbow (2) from the cable access end B for a certain length and is retained outside the probe housing (3), and the handle (1) wraps the part of the first section of the cable outside the cable (10) access end B, the whole elbow (2), and the part of the probe housing (3) outside the probe access end a.

7. A temperature sensor according to claim 3, wherein the two ends of the elbow (2) are a probe connection end C and a cable access end B, respectively, the elbow (2) has a reduced diameter near the probe connection section C and the same diameter as the probe housing (3), the elbow (2) is integrally formed with the probe housing (3), the handle (1) wraps a portion of the first section of cable outside the cable access end B, and the elbow (2) extends the entire length from the cable access end B to the vicinity of the probe connection end C.

8. The temperature sensor according to any one of claims 1 to 3, wherein the two ends of the elbow (2) are a probe access end A and a cable access end B, respectively, the first segment of the cable (10) is inserted into the elbow from the cable access end B to a certain length, a sealing sleeve (9) is arranged outside the cable access end B, the sealing sleeve (9) covers a part of the elbow length near the cable access end B and a part of the cable length outside the cable access end B, and the handle (1) covers the sealing sleeve (9).

9. Temperature sensor according to one of claims 4 to 7, characterized in that a gland (9) is provided outside the cable (10) access end B, said gland (9) covering a portion of the length of the bend near said cable access end B, a portion of the length of the cable outside the cable access end B, said grip (1) covering said gland (9).

10. Temperature sensor according to one of claims 1 to 7, wherein the other end of the cable (10) is connected to the connector (12) through a ferrule nut assembly (11), the connector (12) being adapted to be connected to an external control device, the ferrule nut assembly comprising a ferrule nut (11-1), a ferrule stud (11-2), and a sealing ferrule (11-5), the ferrule stud (11-2) having an upper protrusion (11-6), the upper protrusion (11-6) being externally threaded and fixedly connected to the ferrule nut (11-1), the upper protrusion (11-6) being internally provided with a tapered through hole, the sealing ferrule (11-5) being provided with a through hole for the cable (10) to pass through, the sealing ferrule (11-5) being tapered, and a part of the sealing cutting sleeve (11-5) is inserted into the conical through hole of the upper protruding part (11-6) and matched with the conical through hole in the upper protruding part (11-6) in shape.

11. The temperature sensor according to claim 10, wherein the ferrule nut assembly (11) further comprises a sealing gasket (11-3) and a locking nut (11-4), the ferrule stud (11-2) further comprises a lower protrusion (11-7), the sealing gasket (11-3) is sleeved on the lower protrusion (11-7) and abuts against the ferrule stud, and the locking nut (11-4) is fixedly connected with a thread arranged outside the lower protrusion (11-7).

12. Temperature sensor according to one of claims 1 to 7, characterized in that the handle (1) is made of a material that can withstand high temperatures above 350 ℃ and strong acids and bases, preferably Polyimide (PI), Polybenzimidazole (PBI), Polyetheretherketone (PEEK).

13. A method of manufacturing a thermocouple temperature sensor, comprising:

s1, providing a cable, wherein the cable comprises a conductor bundle consisting of a plurality of conductors, the conductors are mutually electrically insulated, one end of the cable comprises a first section part and a second section part, an insulating sheath is arranged outside the conductor bundle in the first section part, and no insulating sheath is arranged outside the conductor bundle in the second section part;

s2: providing a bent pipe, wherein the inner diameter of the bent pipe is basically the same as the outer diameter of a first section of the cable, the cable is inserted from one end of the bent pipe, part of the length of the first section is positioned in the bent pipe, and a wire bundle of a second section of the cable penetrates out from the other end of the bent pipe;

s3: providing a probe, wherein the probe is provided with a shell, a hollow part is arranged in the shell, a part of conductor bundle of the second section of the cable is inserted into the hollow part, the first section of the cable is kept outside the shell, and the metal part of the conductor is exposed at a point needing temperature measurement; injecting an insulating material into the hollow part to prevent the exposed metal part from being electrically conducted with the probe shell;

s4: fixedly connecting the shell of the probe with the bent pipe;

s5: and placing the part of the cable, the bent pipe and the probe shell which extend out of the bent pipe into a mould, and injecting a handle into the mould, wherein the handle covers the part of the cable, the whole bent pipe and the part of the length of the probe shell outside the bent pipe.

14. The method according to claim 13, wherein in step S4, the probe housing is inserted into the bent tube for a certain length, and the probe housing and the bent tube are fixedly connected by interference fit or riveting or welding.

15. A method of manufacturing a thermocouple temperature sensor, comprising:

s1, providing a cable, wherein the cable comprises a conductor bundle consisting of a plurality of conductors, the conductors are mutually electrically insulated, one end of the cable comprises a first section part and a second section part, an insulating sheath is arranged outside the conductor bundle in the first section part, and no insulating sheath is arranged outside the conductor bundle in the second section part;

s2: providing a pipe fitting and a probe, wherein the probe is provided with a shell and a hollow part, the length of the probe is greater than that of the pipe fitting, and the probe is inserted into the pipe fitting and extends to be close to the other end of the pipe fitting;

s3, inserting the cable from one end of the pipe fitting, keeping the first section of the cable outside the probe shell, and leading the wire bundle of the second section of the cable to pass through the pipe fitting and enter the extension part of the probe outside the pipe fitting; exposing the metal part of the lead at the point needing temperature measurement; injecting an insulating material into the extension to prevent the exposed metal portion from being electrically connected to the probe housing;

s4: fixedly connecting a shell of the probe with a pipe fitting, bending the pipe fitting to form a bent pipe, wherein the bent pipe is internally provided with a probe hollow part which is bent at the same time;

s5: and placing part of the cable, the bent pipe and the probe which extend out of the bent pipe into a mold, and injecting a handle, wherein the handle covers the part of the cable, the whole bent pipe and the part of the length of the outer probe shell of the bent pipe.

16. The method of claim 15, wherein in step S5, the handle covers a portion of the cable extending outside of the elbow and at least a portion of the elbow, not covering a portion of the probe housing outside of the elbow.

17. The method of claim 15, wherein after step S4 is completed and before step S5, the method further comprises riveting an end of the elbow in the region where the cable is inserted into the elbow, so that the elbow deforms to catch the cable, thereby preventing the cable from moving and providing a sealing effect.

18. The method of claim 17, wherein after the press riveting is completed, a sealing sleeve is sleeved on the outside of the bent pipe and the cable near the press riveting area so as to enhance the sealing, and then the subsequent step S5 is performed.

19. A method of manufacturing a thermocouple temperature sensor, comprising:

s1, providing a cable, wherein the cable comprises a conductor bundle consisting of a plurality of conductors, the conductors are mutually electrically insulated, one end of the cable comprises a first section part and a second section part, an insulating sheath is arranged outside the conductor bundle in the first section part, and no insulating sheath is arranged outside the conductor bundle in the second section part;

s2: providing an integrally formed pipe fitting, wherein the pipe fitting comprises a hollow pipe part and a probe part, the probe part is provided with an outer shell, a hollow part is arranged in the outer shell, the cable is inserted, part of the length of a first section part of the cable is positioned in the hollow pipe part and is kept outside the outer shell of the probe part, a wire bundle of a second section part of the cable is inserted into the hollow part of the outer shell, and a metal part of the wire is exposed at a point needing temperature measurement;

s3: filling insulating materials into the hollow part of the shell to prevent the exposed metal part from being electrically conducted with the probe shell;

s4: bending the tube to form a bend;

s5: and placing the part of the cable outside the elbow and the elbow into a mould, and injecting a handle, wherein the handle covers the part of the cable outside the elbow and the part of the length of the elbow.

20. The method as claimed in claim 19, wherein after the completion of the step S4, in a region where the cable is inserted into the bent tube portion, one end of the bent tube portion is swaged to deform the bent tube portion to catch the cable, thereby preventing the cable from moving and providing a sealing effect, and then the subsequent step S5 is performed.

21. The method of claim 20, wherein after the press riveting is completed, a sealing sleeve is sleeved on the outside of the bent pipe and the cable near the press riveting area so as to enhance the sealing, and then the subsequent step S5 is performed.

22. The method according to any one of claims 13 to 21, wherein in step S3, the insulating material is one of magnesia powder, PTFE, PFA.

23. The temperature sensor of any one of claims 1-12, wherein the insulating sheath is PTFE or PFA.

24. The method of any one of claims 13-22, wherein the insulating sheath is PTFE or PFA.

Technical Field

The invention relates to the field of temperature detection sensors, in particular to a thermocouple temperature sensor which is arranged in cooking equipment and provided with a plurality of temperature measuring points and is used for detecting the internal temperature of food.

Background

At present, most of sensors for detecting the internal temperature of food in cooking equipment adopt external temperature probes. One end of the sensor is a temperature probe, and the other end is a DC connector, and the temperature probe and the DC connector are connected by a cable. When the temperature probe is used, the temperature probe is inserted into the interior of food (such as large meat such as roast ducks, roast elbows and roast suckling pigs), the DC connector is connected to the external data acquisition control end, and the middle cable needs to pass through the gap of the door. When not in use, the probe needs to be separately placed outside the cooking apparatus, and thus a separate storage location is required. For example, prior art 1(CN110553749A) discloses a temperature probe which is divided into two parts, a temperature probe 6 and a DC plug 10, with a connecting wire 8 between them. In use, the temperature probe 6 is located inside the cooking device and inserted into the food (such as big meat like roast duck, roast elbow, roast suckling pig), the DC plug 10 is located outside the cooking device and connected to the external data acquisition control terminal, and the connection line 10 needs to pass through the cooking device.

Above-mentioned prior art 1 belongs to external probe, because need pass through the inside leakproofness of cooking equipment with the cable during the use through the crack, secondly, still need externally set up the region of depositing the probe alone, and the probe also loses easily.

Although the above problems can be solved if the interface of the DC connector is simply directly provided inside the cooking appliance, this solution is difficult to be put into practical use because the interface of the DC connector itself cannot be waterproof and does not endure high temperature. Secondly, after the cooking equipment works, the cooking equipment is usually required to be cleaned, the used cleaning agent is generally strong acid or strong base substance and is cleaned at a higher temperature, the design of the existing temperature sensor has a plurality of defects and is difficult to adapt to the high-temperature high-humidity strong acid and strong base environment, and if the temperature sensor is required to be taken out during cleaning, the DC connector is not convenient to be arranged outside directly.

In the conventional internal probe sensor, when the probe is pulled straight, the probe is in a substantially linear state from one end of the probe to the other end of the probe which is electrically connected. The connecting cable attachment locations of the probe are often located on both the left and right side walls of the bore. When the probe is used, an operator operates in the front, the probe is inserted into food from the front, the tail end of the probe faces upwards or forwards, and the cable bends. For high temperature resistant cable, usually harder, long-time bending operation leads to the cable to produce the pulling force, and easy damage food, difficult fixed after the probe inserts food, grease, filth are easy to invade the temperature measurement probe inside moreover, influence the precision of surveying, can lead to the fracture of cable even, and life is shorter.

Therefore, in the prior art, the temperature sensor used in the cooking equipment is externally arranged, and the fundamental reason is that the design of the temperature sensor cannot be broken through, so that the temperature sensor is difficult to be used in the environment of high temperature, high humidity, strong acid and strong alkali for a long time. The invention provides a temperature sensor, which can be placed in cooking equipment for a long time by reasonably designing the wiring mode and the structural design of a cable, matching a handle and combining a traditional high-temperature-resistant corrosion-resistant material, namely the temperature sensor is always in the cooking equipment when the cooking equipment works, is cleaned or does not work, a special probe storage position is not needed, meanwhile, the temperature sensor is connected with a control circuit part of the cooking equipment by using a ferrule nut component as a wall penetrating component, the ferrule nut component has more reliable high-temperature high-humidity corrosion resistance compared with a DC connector, and therefore the cable does not need to penetrate through a door of the cooking equipment to influence the sealing performance when the cable is used.

Disclosure of Invention

In order to solve the technical problems, the invention provides a temperature sensor, which comprises a cable, a probe and a handle, wherein the cable comprises a conductor bundle consisting of a plurality of conductors, the conductors are mutually electrically insulated, one end of the cable comprises a first section part and a second section part, an insulating sheath is arranged outside the conductor bundle in the first section part, and no insulating sheath is arranged outside the conductor bundle in the second section part; the probe comprises a shell, the interior of the shell is hollow, the probe further comprises a bent pipe, the bent pipe is fixedly connected with the probe, the boundary position P of a first section part and a second section part of the cable is located in the bent pipe, the first section part is located outside the shell of the probe, at least one part of the length of a wire bundle of the second section part is located in the shell of the probe, the probe is provided with one or more temperature measuring points, the temperature measuring points are formed by exposing metal parts of the wires, the temperature of the wire bundle is measured by using a thermocouple principle, and at least one part of the bent pipe is wrapped by the handle.

The cable winding device adopts the structure of the bent pipe, so that the cable is accommodated in the bent pipe for protection, and the cable does not need to be repeatedly bent for a long time during use, and is long in service life. The problem that the high-temperature-resistant cable is easy to deform in the cooking equipment for a long time can be well solved through the design. And the handle structure matched with the bent pipe also has a bending structure, so that the operation is convenient, and the influence on food is reduced as much as possible.

In addition, the boundary position P of the first section part and the second section part of the cable is positioned in the elbow, and the first section part is positioned outside the probe shell, so that more wires can be accommodated in the probe shell, and more temperature measuring points can be arranged.

Further, a part of the probe shell is positioned in the elbow and extends in the elbow, and the probe shell and the elbow are fixedly connected through interference fit or fixedly connected through riveting or welding.

Further, the both ends of return bend are probe incoming end A respectively to and cable incoming end B, probe shell gets into a certain length in the return bend from probe incoming end A, a certain length in cable's first section portion inserts to the return bend from cable incoming end B, the handle parcel the first section portion of the outside partial cable of cable incoming end B, whole return bend and the outside partial probe shell of probe incoming end A.

Or, the two ends of the elbow are respectively a probe access end a and a cable access end B, the probe shell enters the elbow from the probe access end a and crosses over the bent part of the elbow, extends in the elbow, and the tail end is close to the cable access end B, the first section of the cable is inserted into the elbow from the cable access end B by a certain length and is kept outside the probe shell, the handle wraps the first section of the partial cable outside the cable access end B and the length of the elbow from the cable access end B to the vicinity of the probe access end a, namely, the handle does not wrap the elbow completely, and the length of the partial elbow is located outside the handle.

Or, the both ends of return bend are probe incoming end A respectively to and cable incoming end B, the probe shell gets into in the return bend and stridees in the return bend from probe incoming end A the bending part of return bend extends in the return bend, and the terminal cable incoming end B that is close to, the first section of cable inserts certain length in to the return bend from cable incoming end B to keep outside at the probe shell, the handle parcel the outside first section of part cable of cable incoming end B, whole return bend to and the outside partial probe shell of probe incoming end A.

Alternatively, the elbow is integrally formed with the probe housing.

Further, the both ends of return bend are probe connection end C respectively to and cable incoming end B, the return bend near probe connection section C diameter diminishes and is the same with probe shell diameter, return bend and probe shell integrated into one piece, the handle parcel the outside first section portion of part cable of cable incoming end B to and the return bend is from cable incoming end B to near the whole length of probe connection end C.

Preferably, the two ends of the elbow are respectively a probe access end a and a cable access end B, the first section of the cable is inserted into the elbow by a certain length from the cable access end B, a sealing sleeve is arranged outside the cable access end B, the sealing sleeve covers the part of the elbow length near the cable access end B and the part of the cable length outside the cable access end B, and the handle covers the sealing sleeve.

For the convenience of fixing the probe inside the cooking equipment, the other end of the cable passes a cutting ferrule nut component to be connected with the connector, the connector is used for being connected with an external control device, the cutting ferrule nut component comprises a cutting ferrule screw cap, a cutting ferrule screw bolt and a sealing cutting ferrule, the cutting ferrule screw bolt is provided with an upper protruding part, the outer part of the upper protruding part is provided with threads and is fixedly connected with the cutting ferrule screw cap, a conical through hole is formed in the inner part of the upper protruding part, the sealing cutting ferrule is provided with a through hole for the cable to pass through, the sealing cutting ferrule is conical, and one part of the sealing cutting ferrule is inserted into the conical through hole of the upper protruding part and is matched with the conical through hole in the upper protruding part in shape.

Furthermore, the ferrule nut assembly further comprises a sealing gasket and a locking nut, the ferrule stud is further provided with a lower protruding portion, the sealing gasket is sleeved on the lower protruding portion and is abutted against the ferrule stud, and threads are arranged outside the lower protruding portion and fixedly connected with the locking nut.

For the selection of materials, the handle is made of a material which can bear high temperature of more than 350 ℃ and is resistant to strong acid and strong alkali, and Polyimide (PI), Polybenzimidazole (PBI) and polyether ether ketone (PEEK) are preferred; the insulating material is one of magnesium oxide powder, PTFE and PFA; the insulating sheath is made of PTFE or PFA materials.

The present invention also provides a method of manufacturing a thermocouple temperature sensor,

if the elbow and probe are two parts that are joined together in a manner that does not fully nest, the major manufacturing steps include:

s1, providing a cable, wherein the cable comprises a conductor bundle consisting of a plurality of conductors, the conductors are mutually electrically insulated, one end of the cable comprises a first section part and a second section part, an insulating sheath is arranged outside the conductor bundle in the first section part, and no insulating sheath is arranged outside the conductor bundle in the second section part;

s2: providing a bent pipe, wherein the inner diameter of the bent pipe is basically the same as the outer diameter of a first section of the cable, the cable is inserted from one end of the bent pipe, part of the length of the first section is positioned in the bent pipe, and a wire bundle of a second section of the cable penetrates out from the other end of the bent pipe;

s3: providing a probe, wherein the probe is provided with a shell, a hollow part is arranged in the shell, a part of conductor bundle of the second section of the cable is inserted into the hollow part, the first section of the cable is kept outside the shell, and the metal part of the conductor is exposed at a point needing temperature measurement; injecting an insulating material into the hollow part to prevent the exposed metal part from being electrically conducted with the probe shell;

s4: fixedly connecting the shell of the probe with the bent pipe;

s5: and placing the part of the cable, the bent pipe and the probe shell which extend out of the bent pipe into a mould, and injecting a handle into the mould, wherein the handle covers the part of the cable, the whole bent pipe and the part of the length of the probe shell outside the bent pipe.

In step S4, the probe housing is inserted into the bent tube for a certain length, and the probe housing and the bent tube are fixedly connected by interference fit, or fixedly connected by riveting or welding. Alternatively, in step S5, the handle covers a portion of the cable extending outside of the elbow, at least a portion of the elbow not covering the portion of the probe housing outside of the elbow.

Preferably, after step S4 is completed and before step S5, in the area where the cable is inserted into the bent tube, one end of the bent tube is crimped, so that the bent tube deforms and catches the cable, thereby preventing the cable from moving and achieving the sealing effect. Further, after the press riveting is completed, a sealing sleeve is sleeved on the outer side of the bent pipe and the cable near the press riveting area, so that sealing is enhanced, and then the subsequent step S5 is performed.

If the elbow and the probe are nested parts, the manufacturing method comprises the following steps:

s1, providing a cable, wherein the cable comprises a conductor bundle consisting of a plurality of conductors, the conductors are mutually electrically insulated, one end of the cable comprises a first section part and a second section part, an insulating sheath is arranged outside the conductor bundle in the first section part, and no insulating sheath is arranged outside the conductor bundle in the second section part;

s2: providing a pipe fitting and a probe, wherein the probe is provided with a shell and a hollow part, the length of the probe is greater than that of the pipe fitting, and the probe is inserted into the pipe fitting and extends to be close to the other end of the pipe fitting;

s3, inserting the cable from one end of the pipe fitting, keeping the first section of the cable outside the probe shell, and leading the wire bundle of the second section of the cable to pass through the pipe fitting and enter the extension part of the probe outside the pipe fitting; exposing the metal part of the lead at the point needing temperature measurement; injecting an insulating material into the extension to prevent the exposed metal portion from being electrically connected to the probe housing;

s4: fixedly connecting a shell of the probe with a pipe fitting, bending the pipe fitting to form a bent pipe, wherein the bent pipe is internally provided with a probe hollow part which is bent at the same time;

s5: and placing part of the cable, the bent pipe and the probe which extend out of the bent pipe into a mold, and injecting a handle, wherein the handle covers the part of the cable, the whole bent pipe and the part of the length of the outer probe shell of the bent pipe.

If the elbow and probe are designed as an integral part, the method of manufacture includes the steps of:

s1, providing a cable, wherein the cable comprises a conductor bundle consisting of a plurality of conductors, the conductors are mutually electrically insulated, one end of the cable comprises a first section part and a second section part, an insulating sheath is arranged outside the conductor bundle in the first section part, and no insulating sheath is arranged outside the conductor bundle in the second section part;

s2: providing an integrally formed pipe fitting, wherein the pipe fitting comprises a hollow pipe part and a probe part, the probe part is provided with an outer shell, a hollow part is arranged in the outer shell, the cable is inserted, part of the length of a first section part of the cable is positioned in the hollow pipe part and is kept outside the outer shell of the probe part, a wire bundle of a second section part of the cable is inserted into the hollow part of the outer shell, and a metal part of the wire is exposed at a point needing temperature measurement;

s3: filling insulating materials into the hollow part of the shell to prevent the exposed metal part from being electrically conducted with the probe shell;

s4: bending the tube to form a bend;

s5: and placing the part of the cable outside the elbow and the elbow into a mould, and injecting a handle, wherein the handle covers the part of the cable outside the elbow and the part of the length of the elbow.

The invention also provides a cooking device with the temperature sensor, in particular to a steaming cooking device. The steaming cooking equipment comprises a cooking box body used for placing food materials to be cooked and an electric appliance box used for controlling the work of the steaming cooking equipment. The handle, the probe and part of the cable of the temperature sensor are positioned in the cooking box body, and the connector is fixedly connected with a circuit board in the electric appliance box. Be provided with the through-hole on the lateral wall of culinary art box, through above-mentioned cutting ferrule nut component with temperature sensor and culinary art box fixed connection.

Drawings

FIG. 1 is a structural view of a temperature sensor according to embodiment 1 of the present invention;

FIG. 2 is a structural view of a probe portion in example 1 of the present invention;

fig. 3 is a block diagram of a ferrule nut assembly according to embodiment 1 of the present invention;

FIG. 4 is a structural view of a handle portion of a temperature sensor according to embodiment 2 of the present invention;

fig. 5 is a structural view of a handle portion of a temperature sensor according to embodiment 3 of the present invention.

Detailed Description

Temperature sensor example 1:

referring to fig. 1-3, the temperature sensor comprises a cable 10, a probe and a handle 1, wherein the cable comprises a conductor bundle consisting of a plurality of conductors (4, 5 and 6), the conductors are mutually electrically insulated, one end of the cable comprises a first section part and a second section part, an insulating sheath is arranged outside the conductor bundle in the first section part, and no insulating sheath is arranged outside the conductor bundle in the second section part; the probe comprises a shell 3 and a bent pipe 2, the bent pipe 2 is hollow inside and is fixedly connected with the probe 3, the boundary position P of a first section part and a second section part of the cable is located in the bent pipe, the first section part is located outside the probe shell 3, at least one part of the length of a wire bundle of the second section part is located in the probe shell, the probe is provided with one or more temperature measuring points (7, 8), the temperature measuring points are formed by exposing metal parts of the wires, the wire bundle measures the temperature by using a thermocouple principle, and the bent pipe is wrapped by the handle 1. At the other end of the cable 10, a connector 12 is further included, the connector 12 is used for connecting with an external control device, a ferrule nut assembly 11 is further arranged between the connector 12 and the temperature sensor, and the cable 10 passes through the ferrule nut assembly 11 and is connected with the connector 12.

In fig. 1, two ends of the elbow are a probe access end a and a cable access end B, respectively, the probe housing 3 enters the elbow for a certain length from the probe access end a, and the first section of the cable is inserted into the elbow for a certain length from the cable access end B; handle 1 wholly becomes right angle shape, handle 1 parcel the outside first section of part cable of cable incoming end B, whole return bend and the outside part probe shell of probe incoming end A. The handle 1 is made of high temperature acid and alkali resistant injection molding materials such as PI, PBI, PEEK and the like, and can bear high temperature of more than 350 ℃ and resist strong acid and alkali.

And a part of the probe shell is inserted into the elbow and extends in the elbow, and the probe shell and the elbow are fixedly connected through interference fit or fixedly connected through riveting and welding. The shell of the probe is formed by a stainless steel thin-wall tube, the tail end of the shell is provided with a sharp corner, the interior of the shell is hollow, the shell can be made of 316 or 304 materials, and the thickness of the shell is 0.2-0.5 mm.

In a preferred embodiment, the whole bent pipe is formed by bending a straight stainless steel pipe, and the bent angle may be 90 ° to 170 °.

As an optional embodiment, a sealing sleeve 9 is disposed outside the cable access end B, the sealing sleeve 9 covers a portion of the length of the bent pipe near the cable access end B, a portion of the length of the cable outside the cable access end B, and the handle 1 covers the sealing sleeve 9. The sealing sleeve 9 is made of high-temperature resistant PTFE or PFA and the like.

Referring to fig. 2, the structure of the inner part of the probe for measuring temperature is schematically shown, and the probe comprises a housing 3, a lead 4 and a lead 6 are arranged in the housing, wherein the lead 5 is a common lead, the lead 4 is communicated with the lead 5, a first exposed temperature measuring point 7 is formed at a connecting part, the lead 6 is communicated with the lead 5, a second exposed temperature measuring point 8 is formed at the connecting part, an insulating material 13 is filled between the leads, and the insulating material can be high-temperature resistant powder such as magnesium oxide powder. Fig. 2 shows a structure of two temperature measuring points, or a plurality of temperature measuring points may be provided, and when the number of temperature measuring points is large, a common positive/negative electrode structure is adopted to reduce the number of core wires; for example, 5 positive electrodes and 1 common negative electrode are welded at 5 temperature measuring points. The plurality of wires are insulated from each other, the wires usually comprise wire cores and insulating layers coated outside the wire cores, and when the number of the wires is large, the insulating layers are not needed to be arranged on the common cathode part in order to reduce the diameter of the whole wire bundle.

Referring to fig. 3, a schematic diagram of a ferrule nut assembly 11 according to the present invention is shown, which includes the ferrule nut assembly including a ferrule nut 11-1, a ferrule stud 11-2, and a sealing ferrule 11-5, where the ferrule stud 11-2 has an upper protrusion 11-6, the outer portion of the upper protrusion 11-6 is provided with a thread and is fixedly connected with the ferrule nut 11-1, a tapered through hole is provided inside the upper protrusion 11-6, the sealing ferrule 11-5 is provided with a through hole for passing a cable, the sealing ferrule 11-5 is tapered, and a portion of the sealing ferrule 11-5 is inserted into the tapered through hole of the upper protrusion and matches with the tapered through hole in the upper protrusion in shape. When the ferrule nut 11-1 is tightened, the sealing ferrule squeezes the cable inwardly, thereby fixedly connecting the cable to the ferrule nut assembly.

Meanwhile, the ferrule nut assembly further comprises a sealing gasket 11-3 and a locking nut 11-4, the ferrule stud 11-2 is further provided with a lower protruding portion 11-7, the sealing gasket 11-3 is sleeved on the lower protruding portion 11-7 and abuts against the ferrule stud, and threads are arranged on the outer portion of the lower protruding portion 11-7 and fixedly connected with the locking nut 11-4. When the clamping sleeve is used, the lower protruding part 11-7 of the clamping sleeve stud 11-2 penetrates through a side wall with a through hole, the locking nut 11-4 is sleeved on the lower protruding part 11-7 at the other end of the side wall and is screwed in a rotating mode, and therefore the clamping sleeve nut component is fixedly connected with the side wall.

Temperature sensor example 2:

referring to fig. 4, a handle portion of embodiment 2 of the temperature sensor of the present invention, unlike embodiment 1, the probe housing 3 enters the elbow from the probe access end a and spans the curved portion of the elbow, extends within the elbow with the end proximal to the cable access end B, the first segment of the cable is inserted into the elbow a length from the cable access end B and remains outside the probe housing, the handle 1 wraps the portion of the first segment of the cable outside the cable access end B, and the elbow extends from the cable access end B to a length near the probe access end a, i.e., the handle does not fully wrap the elbow, and the portion of the elbow is located outside the handle.

Alternatively, the handle 1 wraps around a portion of the first cable segment outside of the cable access end B, the entire elbow, and a portion of the probe housing outside of the probe access end a.

Temperature sensor example 3:

referring to fig. 5, a 3 rd embodiment of the temperature sensor of the present invention is different from the 1 st embodiment in that the elbow and the housing of the probe are integrally formed. The both ends of return bend are probe connection end C respectively to and cable incoming end B, the return bend reduces and is the same with probe shell diameter near probe connection section C, return bend and probe shell integrated into one piece, 1 parcel of handle the first section portion of the outside part cable of cable incoming end B to and the return bend from cable incoming end B to near the whole length of probe connection end C.

The invention also provides a method for manufacturing the thermocouple temperature sensor, which is slightly different according to whether the bent pipe and the probe are integrated parts and are completely nested.

If the elbow and probe are two parts that are joined together in a manner that does not fully nest, the method of manufacture includes the steps of:

s1, providing a cable, wherein the cable comprises a conductor bundle consisting of a plurality of conductors, the conductors are mutually electrically insulated, one end of the cable comprises a first section part and a second section part, an insulating sheath is arranged outside the conductor bundle in the first section part, and no insulating sheath is arranged outside the conductor bundle in the second section part;

s2: providing a bent pipe, wherein the inner diameter of the bent pipe is basically the same as the outer diameter of a first section of the cable, the cable is inserted from one end of the bent pipe, part of the length of the first section is positioned in the bent pipe, and a wire bundle of a second section of the cable penetrates out from the other end of the bent pipe;

s3: providing a probe, wherein the probe is provided with a shell, a hollow part is arranged in the shell, a part of conductor bundle of the second section of the cable is inserted into the hollow part, the first section of the cable is kept outside the shell, and the metal part of the conductor is exposed at a point needing temperature measurement; injecting an insulating material into the hollow part by using a tool to prevent the exposed metal part from being electrically conducted with the probe shell;

s4: fixedly connecting the shell of the probe with the bent pipe;

s5: and placing the part of the cable, the bent pipe and the probe shell which extend out of the bent pipe into a mould, and injecting a handle into the mould, wherein the handle covers the part of the cable, the whole bent pipe and the part of the length of the probe shell outside the bent pipe.

In step S4, the probe housing is inserted into the bent tube for a certain length, and the probe housing and the bent tube are fixedly connected by interference fit, or fixedly connected by riveting or welding.

Alternatively, in step S5, the handle covers a portion of the cable extending outside of the elbow, at least a portion of the elbow not covering the portion of the probe housing outside of the elbow.

Preferably, after step S4 is completed and before step S5, in the area where the cable is inserted into the bent tube, one end of the bent tube is crimped, so that the bent tube deforms and catches the cable, thereby preventing the cable from moving and achieving the sealing effect. Further, after the press riveting is completed, a sealing sleeve is sleeved on the outer side of the bent pipe and the cable near the press riveting area, so that sealing is enhanced, and then the subsequent step S5 is performed.

If the elbow and the probe are nested parts, the manufacturing method comprises the following steps:

s1, providing a cable, wherein the cable comprises a conductor bundle consisting of a plurality of conductors, the conductors are mutually electrically insulated, one end of the cable comprises a first section part and a second section part, an insulating sheath is arranged outside the conductor bundle in the first section part, and no insulating sheath is arranged outside the conductor bundle in the second section part;

s2: providing a pipe fitting and a probe, wherein the probe is provided with a shell and a hollow part, the length of the probe is greater than that of the pipe fitting, and the probe is inserted into the pipe fitting and extends to the other end of the pipe fitting;

s3, inserting the cable from one end of the pipe fitting, keeping the first section of the cable outside the probe shell, and leading the wire bundle of the second section of the cable to pass through the pipe fitting and enter the extension part of the probe outside the pipe fitting; exposing the metal part of the lead at the point needing temperature measurement; injecting an insulating material into the extension to prevent the exposed metal portion from being electrically connected to the probe housing;

s4: fixedly connecting a shell of the probe with a pipe fitting, bending the pipe fitting to form a bent pipe, wherein the bent pipe is internally provided with a probe hollow part which is bent at the same time;

s5: and placing part of the cable, the bent pipe and the probe which extend out of the bent pipe into a mold, and injecting a handle, wherein the handle covers the part of the cable, the whole bent pipe and the part of the length of the outer probe shell of the bent pipe.

Alternatively, in step S5, the handle covers the portion of the cable extending outside the elbow and at least a portion of the elbow, not the portion of the probe housing outside the elbow.

Preferably, after step S4 is completed and before step S5, in the area where the cable is inserted into the bent tube, one end of the bent tube is crimped, so that the bent tube deforms and catches the cable, thereby preventing the cable from moving and achieving the sealing effect. Further, after the press riveting is completed, a sealing sleeve is sleeved on the outer side of the bent pipe and the cable near the press riveting area, so that sealing is enhanced, and then the subsequent step S5 is performed.

If the elbow and probe are designed as an integral part, the method of manufacture includes the steps of:

s1, providing a cable, wherein the cable comprises a conductor bundle consisting of a plurality of conductors, the conductors are mutually electrically insulated, one end of the cable comprises a first section part and a second section part, an insulating sheath is arranged outside the conductor bundle in the first section part, and no insulating sheath is arranged outside the conductor bundle in the second section part;

s2: providing an integrally formed pipe fitting, wherein the pipe fitting comprises a hollow pipe part and a probe part, the probe part is provided with an outer shell, a hollow part is arranged in the outer shell, the cable is inserted, part of the length of a first section part of the cable is positioned in the hollow pipe part and is kept outside the outer shell of the probe part, a wire bundle of a second section part of the cable is inserted into the hollow part of the outer shell, and a metal part of the wire is exposed at a point needing temperature measurement;

s3: filling insulating materials into the hollow part of the shell to prevent the exposed metal part from being electrically conducted with the probe shell;

s4: bending the tube to form a bend;

s5: and placing the part of the cable outside the elbow and the elbow into a mould, and injecting a handle, wherein the handle covers the part of the cable outside the elbow and the part of the length of the elbow.

Preferably, after the completion of step S4, in the region where the cable is inserted into the bent tube portion, one end of the bent tube portion is clinched, the bent tube portion is deformed to catch the cable, the cable is prevented from moving and a sealing effect is exerted, and then the subsequent step S5 is performed. Further, after the press riveting is completed, a sealing sleeve is sleeved on the outer side of the bent pipe and the cable near the press riveting area, so that sealing is enhanced, and then the subsequent step S5 is performed.

In the above manufacturing method, in step S3, the insulating material is one of magnesium oxide powder, PTFE, and PFA.

The invention also provides a cooking device with the temperature sensor, in particular to a steaming cooking device. The steaming cooking equipment comprises a cooking box body used for placing food materials to be cooked and an electric appliance box used for controlling the work of the steaming cooking equipment. The handle, the probe and part of the cable of the temperature sensor are positioned in the cooking box body, and the connector is fixedly connected with a circuit board in the electric appliance box. Be provided with the through-hole on the lateral wall of culinary art box, through above-mentioned cutting ferrule nut component with temperature sensor and culinary art box fixed connection.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.