KR200492020Y1 - 3d thermocouple structure for the improvement of durability and efficiency of thermocouple by using the hollow-type metal with high thermal conductivity and electrical conductivity - Google Patents

Abstract

The present invention relates to a thermocouple bonding technology and structure that increases the temperature control efficiency of a structure to be measured by reducing the temperature measurement deviation of a thermocouple and reducing the temperature measurement deviation of a space according to a position, in particular, compared to a conventional bonding technology using argon welding. It is structurally robust, technically simple, and relates to a thermocouple bonding technology and structure developed to improve the accuracy of temperature measurement.
The present invention is characterized by cross-linking two different metal wires of the thermocouple to increase the contact point for wiring, and then inserting a hollow hollow type silver with a purity of 90% or more into the end and compressing it so that the surface contact is made stable and has a robust structure. Is done.
The thermocouple according to the present invention can be easily and sturdyly bonded without the help of individual expensive equipment such as a welding machine, as compared to the conventional joining technology, and also improves durability, reduces error in measurement temperature, and reduces temperature variation according to the position of the thermocouple. By reducing it, efficient temperature measurement can be expected.

Description

Improved durability and efficient thermocouple structure using hollow type metal with excellent thermal conductivity and electrical conductivity {3D THERMOCOUPLE STRUCTURE FOR THE IMPROVEMENT OF DURABILITY AND EFFICIENCY OF THERMOCOUPLE BY USING THE HOLLOW-TYPE METAL WITH HIGH THERMAL CONDUCTIVITY AND ELECTRICAL CONDUCTIVITY}

The present invention relates to a thermocouple bonding technology and a structure that increases the temperature control efficiency of a structure to be measured by reducing the temperature measurement deviation of a thermocouple as a temperature sensor and reducing the temperature measurement deviation of a space according to a position, in particular, using an existing argon welding. It is related to a thermocouple bonding technology and a structure developed to be structurally robust, technically simple, and improve the accuracy of heat transfer and temperature measurement compared to bonding technology.

When the temperature difference occurs at the junction of two different metal wires, the thermocouple measures the temperature using the Seebeck effect, in which thermal current flows through the circuit by generating thermal power. As a general thermocouple joining technique, argon welding using a thermocouple welding machine that is joined in a short time using an instantaneous electrical spark is widely used. This is because two different metal wires are joined using a welding technique based on one contact. Due to the difference in temperature, welding gas amount, and joining time, an unformed joint is formed and used.

In addition, it is easy to be inadvertently disconnected due to a structural problem in which two different metal wires are connected by a single contact point, and when used for a long time, micro-cracks are generated in the joints, which may cause the joints to be disconnected. When the thermocouple is disconnected due to the disconnection of the junction or the joint, it is impossible to measure the temperature of the surface or space to be measured, causing damage to the system or even fire, and it becomes inevitable to re-weld the disconnected thermocouple.

As an example of such a prior art, in the process of manufacturing semiconductors, flat panel displays, LEDs, and photovoltaic devices, maintaining the process temperature is very important from the viewpoint of improving yield, and an electric heater jacket is commonly used to maintain the process temperature. In the case of using a thermocouple that uses a single contact point with conventional argon welding for such a heater jacket, the deviation is severe based on the measured temperature (more than 3 degrees in the case of a measured temperature of 200 degrees), and the overall temperature varies greatly depending on the location of the thermocouple junction. It was measured. In particular, in the case of a heater jacket surrounding a small-diameter pipe or valve, the temperature deviation was more serious because the distance from the position of the heating wire inside the heater jacket varies depending on the position of the thermocouple. This can have a profound effect on the overall process due to local overheating or temperature drop. In addition, there are several disadvantages, such as difficulty in fixing the thermocouple in the process of manufacturing the heater jacket due to the micro-crack near the contact point.

The present invention has been devised to solve the above-described conventional problems, and the purpose of the present invention is to solve the conventional problems as described above and maintain a relatively wide joint surface with a sturdy surface-joining structure. It is to provide a stable structure that prevents disconnection due to micro-cracking at the junction, reduces temperature deviation in temperature measurement, reduces temperature difference due to change in position, and consequently makes temperature measurement more accurate and efficient.

The thermocouple structure according to the present invention may include a joining part interwoven by crossing two types of metal wires and a heat conducting member surrounding the outer surface of the joining part.

The bonding portion may be bent into a U-shape, and then a heat-conducting member may be compressed on the outer surface.

In addition, after passing through the hollow portion of the heat-conducting member, the joint may be bent in a U-shape and then pressed.

The heat conducting member may include a hollow portion.

The thermal conductive member may be made of a material having a thermal conductivity of 300 (Kcal/mh℃) or higher.

As described above, the present design can easily and reliably join a thermocouple, which is one of the temperature sensors, without additional equipment such as an expensive welding machine, as compared to the conventional joining technology, and reduces the error of the measured temperature and reduces the thermocouple. Effective temperature measurement can be expected by reducing the temperature deviation according to the position of.

In particular, in the process of manufacturing semiconductors, flat panel displays, LEDs, and photovoltaic devices, maintaining the process temperature is very important from the viewpoint of improving yield, and an electric heater jacket is commonly used to maintain the process temperature. These heater jackets are installed so that the temperature of the liquid or gas flowing inside the storage container, pipes, filters, fittings, valves, etc. is raised to a specific temperature or directly covers and covers the external shape of the above-described installation request material to maintain a specific temperature. It is a product.

Table 1 shows data comparing actual effects of the present invention. Although the type of thermocouple is not limited, the thermocouple used in the present invention is a K-type and is a result of comparing and measuring an existing argon welded thermocouple (Comparative Example 1) and a thermocouple (Example 1) of the present invention at a temperature of 200 degrees.

time
(minute) 0 One 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 Comparative Example 1 28 63 117 168 182 193 204 197 203 199 200 202 200 197 201 200 202 Example 1 29 65 123 177 197 198 200 200 200 201 200 201 200 200 200 200 200

1 is a conceptual diagram according to the present invention.

The thermocouple 10 according to the present invention may include a junction 50 interwoven by crossing two types of metal wires and a heat conducting member 40 surrounding the outer surface of the junction 50.

1) One end of each of the coated thermoelectric metal wire 1 (20) and the coated thermoelectric metal wire 2 (21) is stripped about 12 mm to the inner coating using a stripper, and the stripped metal wire 1 (30) and the stripped metal wire 2 (31) To form.

The thickness of the uncovered metal wire 1 (30) and the uncovered metal wire 2 (31) may be the same or different.

The junction 50 formed by crossing the stripped metal wire 1 (30) and the stripped metal wire 2 (31) may be folded one or more times after crossing.

2) The stripped metal wire 1 (30) and the stripped metal wire 2 (31) are cross-woven to form a joint 50. Then, the end portion is cut so that the length of the bonding portion 50 is about 10 mm, and then the thermal conductive member 40 is inserted into the end portion and bent in a U shape.

This has the effect of increasing the contact point for the connection by crossing the uncovered metal line 1 (30) and the uncovered metal line 2 (39), and increasing the contact point by bending again.

3) The bonding portion 50 and the heat conducting member 40 are compressed.

The bonding portion 50 may be bent in a U-shape and then crimped the heat conducting member 40 on the outer surface.

In addition, after inserting the heat-conducting member 40 in the junction 50, the junction may be bent in a U-shape, and then the heat-conducting member 40 may be compressed.

The pressing can be performed through a press.

The press may be in the form of a roller or plate.

By inserting the heat conducting member 40 into the joining portion 50 and compressing it, the surface contact is increased as well as having a stable thermocouple 10 connection structure.

The heat conducting member 40 may include a hollow portion 41.

Referring to FIG. 2, the heat-conducting member 40 may have an empty cylindrical shape as shown in FIG. 2(a) or a cone shape with empty interior as shown in FIG. 2(b).

The cross-sectional area of the cone may be constant or narrow as it goes inward.

The material of the thermal conductive member 40 is not limited as long as it has a high thermal conductivity and electrical conductivity. The heat-conducting member 40 may be a metal, preferably silver, copper, iron, aluminum, stainless steel, tungsten, chromium, or any one or more alloys of nickel, more preferably the heat-conducting member 40 ) May be made of high purity silver.

The thermal conductive member 40 may be a material having a thermal conductivity of 300 (Kcal/mh℃) or higher.

In one specific example, as a heat conduction member 40, the effect of providing a precise and efficient temperature measurement by reducing the temperature measurement error by improving the heat transfer rate and electrical conductivity by using silver having a purity of 90% or higher with high thermal conductivity and electrical conductivity have.

10: thermocouple
20: sheathed thermoelectric metal wire 1
21: sheathed thermoelectric metal wire 2
30: stripped metal wire 1
31: stripped metal wire 2
40: heat conducting member
41: hollow
50: joint

Claims (5)

A junction in which two types of metal wires having been stripped are interwoven and interwoven; And
A heat conducting member surrounding the outer surface of the junction;
It includes,
The bonding portion is bent in a U-shape, and then a heat conducting member is pressed on the outer surface,
The thermal conductive member is made of a material having a thermal conductivity of 300 (Kcal/mh℃) or higher,
Cut the end of the metal wire so that the length of the joint is 10 mm, insert the heat conducting member into the end, and bend it into a U shape.
The hollow portion formed inside the heat-conducting member and passing through the joining portion has a hollow cone shape.
The cross-sectional area of the cone is a thermocouple structure that narrows toward the inside. delete delete delete delete

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