JP2002195887A - Pipe wall thermometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermometer for pipe wall temperature measurement, compact as a whole, easy to mount on a pipe wall or replace with another, and capable of accurately measuring the temperature of a pipe wall and that of a fluid in the pipe. SOLUTION: In this pipe wall thermometer, a magnet is used as a mounting part of a thermometer body, an inner circumferential wall surface of the mounting part is substantially equated to the radius of curvature of the outer circumference of the pipe to be mounted therewith, a through hole bored through to a confronting wall surface on the front side is provided in the middle of the inner circumferential wall surface, an elastic body and a temperature detecting member are inserted into the through hole with the detecting member pressed against the outer circumferential wall surface of the pipe by the elastic body, the wall surface of the front side of the mounting part is scaled with and firmly fixed to the rear surface of the thermometer body so as to cover the through hole, and a solar battery part and a temperature display part are disposed on a surface of the thermometer body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a tube wall thermometer for measuring the temperature of a tube wall in order to know the temperature of a fluid inside piping such as an air conditioner.

[0002]

2. Description of the Related Art Conventionally, in order to measure the temperature of a fluid in a pipe of an air conditioner or the like, a through-hole penetrating into the inside of the pipe is opened at an appropriate place in the pipe, and a thermometer is inserted into the through-hole to measure the temperature of the fluid. There are known devices for directly measuring. Further, a device for measuring the temperature of an internal fluid through a tube wall by attaching a thermocouple to the outside of the tube is also known as Japanese Utility Model Application Laid-Open No. 60-176147. However, while it is possible to directly measure the temperature of the fluid, it is difficult to process the through-holes in the pipes or to damage the pipes.Therefore, a measuring device that measures the pipe wall temperature and estimates the temperature of the fluid in the pipes has been proposed. For example, Japanese Utility Model Application Laid-Open No. 63-188531 is known, and a thermometer for measuring the pipe wall temperature disclosed in Japanese Utility Model Application Laid-Open No. Is fixed, and the display of the thermometer is installed at a remote place.

[0003]

However, a device for forming a through hole through a pipe of an air conditioner or the like and inserting a thermometer into the through hole requires precise processing of the pipe, which takes time and effort. There is a problem,
The thermometer in the 63-188531 publication requires a band-shaped member to be wrapped around the entire circumference of the pipe when mounting, and it takes time and effort to mount the temperature detection unit.
There is a problem that the installation space becomes large because the temperature display section must be installed at a remote place.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to easily install and replace a thermometer for measuring the temperature of a fluid in a pipe, and to accurately measure the temperature of the pipe wall and the fluid in the pipe. Another object of the present invention is to provide a tube wall thermometer for measuring a tube wall temperature which makes the whole thermometer compact.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a thermometer body having a magnet as a mounting portion, and having a radius of curvature substantially equal to a radius of curvature of a pipe outer circumference on which an inner peripheral wall surface of the mounting portion is to be mounted. In the center of the inner peripheral wall surface, a through hole is provided to penetrate the wall surface on the opposite surface side, and an elastic body and a temperature detecting member are inserted into the through hole, and the temperature detecting member is attached to the outer periphery of the pipe by the elastic body. While being pressed against the wall surface, the wall surface on the front side of the mounting portion is hermetically sealed so as to cover the through hole on the back surface of the thermometer main body, and the surface of the thermometer main body is a tube wall on which the solar cell portion and the temperature display portion are disposed. It is a thermometer. The effect is that it can be easily attached to the wall of the desired pipe by a magnet, a closed space consisting of a through hole is formed, and the temperature detecting member is pressed against the pipe by an elastic body. Since it is operated by attaching a magnet and a solar cell unit, the whole tube wall thermometer becomes compact.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a preferred tube wall thermometer of the present invention will be described with reference to the drawings. FIG. 1A is a cross-sectional view in which the pipe wall thermometer of this embodiment is attached to a pipe, and FIG.
FIG. 1 is a front view, in which a hot fluid or a cold fluid flows inside a pipe 1 of an air conditioner or the like, and it is important to control the temperature of the fluid in the air conditioning control. The thermometer of the present embodiment is of a type that measures the temperature of the fluid by measuring the pipe wall temperature of the pipe, but a thick heat insulating material 12 is wound around the outer peripheral wall 11 of the pipe 1 of the air conditioner, The temperature of the pipe 1 covered with the heat insulating material 12 is close to the temperature of the fluid flowing in the pipe, and the temperature of the fluid in the pipe is estimated by measuring the outer peripheral temperature of the pipe wall. A part 13 is hollowed out so that the mounting part 3 can be stored.
Then, the thermometer main body 2 is attached to the outer periphery of the pipe 1 via the attaching portion 3. The pipe 1 to which the tube wall thermometer 2 according to the present embodiment is attached is a pipe 1 made of a magnetic material such as iron which is frequently used at present, and the attachment part 3 of the thermometer main body 2 to the pipe 1 is a magnet. Has been produced.

As shown in the perspective views of FIGS. 1A and 2, the mounting portion 3 of the magnet has a curvature radius of an inner peripheral wall surface 31 on the back surface thereof and a curvature radius of an outer peripheral wall surface 13 of the pipe 11. The rear surface 21 of the thermometer main body 2 is fixed to a flat wall surface 32 on the front surface side of the mounting portion 3. At a substantially center of the inner peripheral wall 31, a through hole 34 is provided to penetrate the front wall 32. When the thermometer main body 2 is attached to the pipe 1, the through hole 34 is formed on the outer peripheral wall of the pipe 1. The space is sealed by 11 and the back surface portion 21 of the thermometer main body 2, and this space is slightly affected by the outside air temperature, but becomes almost equal to the temperature of the pipe wall, that is, the fluid temperature in the pipe. The mounting portion 3 is prepared in various ways with an inner peripheral wall portion 31 having a radius of curvature corresponding to the radius of curvature of the outer circumference of various pipes.
By providing an adhesive layer 27 (not shown), it is possible to easily combine and fix the thermometer main body 2 with the optimal mounting portion 3 suitable for the outer circumference of the pipe 1 having various outer diameters.

An elastic sponge 35 is inserted into the through hole 34, and the temperature detecting member 22 is arranged on the surface of the sponge 35 by the sponge 35 so as to be pressed against the outer peripheral wall 11 of the pipe 1. The temperature detecting member 22 is composed of a thermocouple, and a lead wire 23 extends from the center of the back surface 21 of the thermometer main body 2.
Connected. The sponge 35 as an elastic body has not only a pressing effect but also a heat insulating effect, so that the above-mentioned closed space is kept at a temperature closer to the temperature of the pipe wall, and the pipe 1 itself is also a heat insulating material. Because it is covered with
The contact point of the temperature detecting member 22 with the pipe is almost the same as the temperature of the fluid in the pipe 1. Surface part 24 of thermometer body 2
Is a processing circuit in which a solar cell unit 25 and a temperature display unit 26 are provided, and a voltage value from the temperature detection member 22 is displayed as a digital temperature.
(Not shown) on the temperature display unit 26. At this time, the power of the processing circuit and the display unit is supplied by the solar cell unit 26, but the power consumption is small enough to operate with indoor lighting or a flashlight.

[Effect] This embodiment has the above-mentioned structure, and since a magnet is used as an attachment means, it can be easily attached to a desired pipe on a wall surface, and processing such as insertion of a temperature sensor into the pipe is performed. Is not required, and it is not necessary to wind a mounting band around the entire circumference of the pipe as in the conventional type for measuring a pipe wall. In particular, when attaching to a pipe covered with heat insulating material, it is sufficient to remove the heat insulating material only at the portion where the thermometer is to be attached, so that the workability can be improved, and if the mounting portion 3 suitable for various pipe diameters is prepared, Remove the release paper and attach
The thermometer can be installed simply by bonding the thermometer main body 2 with the adhesive layer 27, and there is no limitation on the mounting place, and the thermometer can be easily replaced. Also, a closed space consisting of a through hole is formed,
The temperature in the sealed space is substantially the same as the temperature of the tube wall, and the temperature of the tube wall can be accurately measured because the temperature detecting member is pressed against the pipe by the elastic body. In addition, since a thermometer operated by a solar cell is adopted, the temperature can be checked by indoor lighting, and even when installed in a dark place, it can be operated by applying the light of a flashlight, eliminating the need for a long cord. The whole is compact, easy to handle and easy to operate.

It is needless to say that the present invention is not limited to the above embodiment unless the characteristics of the present invention are impaired. For example, a coil spring may be used instead of the elastic sponge. In this case, a heat insulating material may be provided on the back surface of the thermometer main body. Further, the processing circuit for digital temperature display may be provided with a correction circuit so as to display the actual temperature of the fluid in the pipe.

[0011]

As described above, according to the present invention, the mounting portion of the thermometer main body is made of a magnet and the radius of curvature of the outer circumference of the pipe to which the inner peripheral wall of the mounting portion is to be mounted is substantially the same as that of the conventional pipe. There is no need to wrap a mounting band around the entire circumference of the pipe as in the wall measurement type, and there is no need for processing such as inserting a temperature sensor into the pipe, and it can be easily attached to the wall of the desired pipe. The effect that it can be obtained is obtained. Further, since the closed space formed by the through hole is formed and the temperature detecting member is pressed against the pipe by the elastic body, the temperature of the pipe wall and the temperature of the fluid in the pipe can be measured accurately. Furthermore, since the operation is performed by the attachment of the magnet and the solar cell unit, the effect that the whole tube wall thermometer can be made compact can be obtained.

[Brief description of the drawings]

FIG. 1 (a) is a sectional view of a preferred embodiment of a tube wall thermometer of the present invention attached to a pipe, and FIG. 1 (b) is a front view thereof.

FIG. 2 is an overall perspective view of an embodiment of a preferred tube wall thermometer of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Piping 11 ... Outer peripheral wall surface 12 ... Insulation material 13 ... Cut-out part 2 ... Thermometer body 21 ... Back surface 22 ... Temperature detection member 23 ... Lead wire 24 ... Surface part 25 ... Solar cell part 26 ... Temperature display part 27 ... Adhesive layer 3 Mounting part 31 Inner wall surface 32 Planar wall surface 34 Through hole 35 Sponge (elastic body)

Claims (1)

[Claims] 1. A mounting part of a thermometer main body is made of a magnet, and an inner peripheral wall surface of the mounting part has substantially the same radius of curvature as an outer periphery of a pipe to be mounted. An elastic body and a temperature detecting member are inserted into the through hole, and the temperature detecting member is pressed against the outer peripheral wall surface of the pipe by the elastic body. A tube wall thermometer characterized in that the back surface of the main body is hermetically sealed so as to cover the through hole, and the surface of the thermometer main body is provided with a solar cell part and a temperature display part.