JP3700937B2 - Thermometer and thermometer installation method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a thermometer, in particular, a thermometer that is laid in an air conditioning facility or the like and measures the temperature of a gas or liquid that flows through the inside of the thermometer, and a method for installing the thermometer.
[0002]
[Prior art]
Acquisition of temperature information of gas or liquid flowing through the pipe (hereinafter simply referred to as temperature measurement in the pipe) has been conventionally performed in order to realize various controls.
When measuring the temperature in such a pipe, in the prior art, for example, a substantially T-shaped temperature sensor in which a display unit, a transmission unit, and the like are formed at one end of a rod-shaped measurement unit in which a thermocouple and a resistor are incorporated. Is used. When the substantially T-shaped temperature sensor is attached to the pipe, a rod-shaped measuring unit is inserted in the radial direction of the cross section from the hole on the outer peripheral surface of the pipe, and the hole is sealed and fixed. The temperature of the gas or liquid flowing through the inside of the pipe is directly measured.
[0003]
[Problems to be solved by the invention]
However, when such a substantially T-shaped temperature sensor is attached to a pipe such as an air conditioner, the heat insulation provided around the pipe is removed, the water in the pipe is drained, and the pipe side is drilled. A series of extremely troublesome operations such as insertion and installation of the letter-shaped temperature sensor and repair of the heat insulating material after installation were required.
In addition, since the rod-shaped measuring unit is in direct contact with the flowing hot / cold water, the rod-shaped measuring unit may be deformed or damaged even when the T-shaped temperature sensor is inserted and attached even if a reinforcement allowance is applied to the fluid pressure. It was easy and had a situation that required repeated replacement work.
[0004]
In addition, since it is usually laid inside a partition wall of a building, it is necessary to dispose a large number of temperature sensors in each part of the piping which is difficult to work, which is troublesome.
In particular, when the above-mentioned expansion work is applied to existing air conditioning equipment at offices, factories, etc., the construction date is limited to midnight or holidays when the factory is not operating, that is, when fluid does not flow in the piping. There was also a situation that it was done.
Because of these circumstances, a thermometer that can acquire data as temperature information with high accuracy with simple construction has been desired.
[0005]
Therefore, the present invention has been made to solve these problems, and the purpose of the present invention is to make it easy to install and to avoid direct contact with fluids, etc., so that the accuracy is stable over time. The thermometer which can measure the temperature of a to-be-measured object well is provided.
Furthermore, the thermometer installation method for attaching such a thermometer is provided.
[0006]
[Means for Solving the Problems]
In order to solve the above problem, according to the thermometer according to claim 1,
A temperature measurement function unit for measuring the temperature of the object to be measured, a correction value setting function unit for correcting the temperature measurement value measured meter houses a communication function section for performing communication via a communication line, the case or Sensor unit integrated by packaging,
A metal pedestal comprising: a pedestal recess in which the sensor unit is placed; a pair of cutouts provided on both side surfaces; and a bottom part that comes into contact with the outer peripheral surface of the pipe;
A lead part which is a communication line connected to the communication function part;
A fastening band for fastening the metal base and the lead part to the outer periphery of the pipe;
A thermometer that transmits a temperature measurement value via a lead part,
Fastening band of the metal base is fastened in the state of being stretched upward in a non-contact sensor unit together with entering the notch portion of the metal base and said Rukoto.
[0007]
According to the thermometer of claim 2,
The thermometer according to claim 1, wherein
A connector part for connecting the sensor part and the lead part;
An insulating tube covering the connector part by heat shrinkage ;
It is characterized by providing.
[0008]
According to the thermometer of claim 3,
The thermometer according to claim 1 or claim 2,
The metal base is formed of copper or aluminum, characterized in Rukoto.
[0009]
According to the thermometer of claim 4,
In the thermometer according to any one of claims 1 to 3,
The bottom surface of the bottom portion of the metal base is formed to the curvature of the pipe and substantially matching curved surface and said Rukoto.
[0010]
Moreover, according to the thermometer of claim 5,
In the thermometer as described in any one of Claims 1-4 ,
Silicone rubber applied to the contact surface between the bottom surface of the bottom of the metal base and the outer peripheral surface of the pipe;
The equipped and wherein the Rukoto.
[0011]
Moreover, according to the thermometer of claim 6,
In the thermometer according to any one of claims 1 to 5 ,
Silicone grease filled in the base recess of the metal base,
The equipped and wherein the Rukoto.
[0012]
According to the thermometer of claim 7,
In the thermometer as described in any one of Claims 1-6 ,
The temperature measurement function unit is characterized Rukoto comprises a semiconductor thermocouple.
[0013]
Moreover, according to the thermometer installation method of claim 8,
A method of installing the thermometer according to any one of claims 1 to 7 ,
A sensor part installed on a metal base and a lead part extending from the sensor part are arranged in parallel with the pipe axis direction,
Band-tighten substantially perpendicular to the pipe axis direction through a pair of notches and leads on the metal base,
The thermometer is closely fixed.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a thermometer and a thermometer installation method according to an embodiment of the present invention will be described. FIG. 1 is an external view of a thermometer of the present embodiment, FIG. 2 is an internal configuration diagram of a sensor unit, and FIG. 3 is a configuration diagram of a metal base.
As shown in FIG. 1, the thermometer 10 includes a sensor unit 1, a lead unit 2, insulating tubes 3 and 4, a connection unit 5, and a metal base 6 (one specific example of a fixing unit).
[0015]
As shown in FIG. 2, the sensor unit 1 includes a temperature measurement function unit 1a, a correction value setting function unit 1b, a communication function unit 1c, and a connector unit 1d.
Specifically, the temperature measurement function unit 1a includes a semiconductor thermocouple. This semiconductor thermocouple detects temperature using a phenomenon in which an electromotive force is generated by carrier movement due to a temperature gradient in the semiconductor. By adopting such a semiconductor thermocouple, a minute temperature change of the measurement target can be measured. Then, the temperature measurement value that is an analog signal is A / D converted to a temperature measurement value that is digital data and output.
[0016]
The correction value setting function unit 1b has a function of adding a preset correction value to the measured temperature measurement value. Such a correction function is, for example, that when the thermometer of this embodiment is arranged on the outer periphery of the pipe and the temperature of the liquid / gas flowing through the pipe is measured, the temperature difference between the inside and outside of the pipe is corrected. Is.
A predetermined correction value, which is digital data, is added to or subtracted from the temperature measurement value, which is digital data output from the temperature measurement function unit 1a, and is output as a corrected temperature measurement value.
[0017]
The communication function unit 1c converts the corrected temperature measurement value, which is digital data, into signal for communication and transmits the data.
The sensor unit 1 packages the temperature measurement function unit 1a, the correction value setting function unit 1b, and the communication function unit 1c with resin after providing a connector unit 1d with the outside, or a resin case or a metal case It is integrated by storing in a container. By such integration, there is an advantage that the sensor unit 1 can be easily handled, or can be used even in a severe environment such as moisture.
[0018]
The sensor unit 1 is connected to the lead unit 2. The lead portion 2 is specifically a 3-core VCT (vinyl cabtyre) cable. The VCT cable is a vinyl chloride electric wire for wiring, and can be used even in harsh environments such as outdoors.
A connecting portion (not shown) between the connector portion 1 d and the lead portion 2 of the sensor portion 1 is covered with an insulating tube 3.
Here, the insulating tube 3 uses a heat-shrinkable tube with good workability in production, and maintains the insulating performance of the connecting portion.
The other end of the lead portion 2 is also a connection portion 5 that can be connected to a bus cable described later, and this connection portion 5 is also covered with an insulating tube 4 to improve the insulation performance of the connection portion 5.
[0019]
As shown in FIG. 3, the metal pedestal 6 has a substantially concave cross section and is provided with a pedestal recess 6a. Further, a pair of notches 6b are provided on both side surfaces. The metal base 6 is preferably formed of copper or aluminum having excellent thermal conductivity.
The metal pedestal 6 has a function of directly conducting the pipe temperature to the sensor unit 1 and a jig function that eliminates manual variations when installed in the pipe, and these functions are combined. This enables stable temperature measurement.
In this metal base 6, the sensor part 1 and the lead part 2 are disposed after filling the base recess 6a with silicone grease as a waterproof treatment (see FIG. 1). The sensor unit 1 and the lead unit 2 are fixed to the metal base 6 when the thermometer is actually attached to the measurement target.
[0020]
The thermometer 10 described above has a communication function, but the communication method is, for example, a communication method using a micro LAN. The micro LAN will be briefly described with reference to the drawings. FIG. 4 is an explanatory diagram for explaining a communication system using a micro LAN.
[0021]
Micro LAN is a communication system developed by Dallas Semiconductor. For example, as shown in FIG. 4, a personal computer 50 is connected to a bus cable 40 that is a one-line bus to which the thermometer 10, the contact input unit 20, and the contact output unit 30 of the present embodiment are connected. Various monitoring and control are performed by communicating with the thermometer 10, the contact input unit 20, and the contact output unit 30.
[0022]
The thermometer 10, the contact input unit 20, and the contact output unit 30 include a memory unit in which ID data is registered for identification. When the computer 50 transmits the ID data on the bus cable 40, any one of the thermometer 10, the contact input unit 20, and the contact output unit 30 that matches the ID data starts communication, and performs data transmission / reception / control. Etc. The thermometer 10 of the present embodiment is particularly suitable for application of such a micro LAN.
[0023]
Next, a method for attaching such a thermometer to the object to be measured will be described with reference to the drawings. 5 and 6 are explanatory views for explaining the thermometer installation method according to the present embodiment. First, as described above, the sensor unit 1 and the lead unit 2 are arranged on the metal base 6 (see FIG. 1). Then, as shown in FIG. 5, the pipe 100 is tightly fixed with a fastening band 7 such as an insulation lock tie.
[0024]
As shown in FIG. 6, the fastening band 7 enters the notch 6b of the metal pedestal 6 so that no misalignment or the like occurs.
Moreover, since the fastening band 7 does not contact the sensor part 1 directly, the sensor part 1 does not receive mechanical stress.
Furthermore, since the metal base 6 is in close contact with the pipe, a heat conduction path is reliably formed.
In this case, if the bottom 6c of the metal pedestal 6 is formed in a curved surface shape that substantially matches the curvature of the pipe 100, the degree of adhesion can be further increased and the heat conduction path can be more reliably formed. It is also possible to increase the contact surface by applying a material having high thermal conductivity (for example, silicone rubber) on the contact surface, so that the heat conduction path can be more reliably formed.
[0025]
By adopting such an installation method, it is possible to improve workability and eliminate work variations. In this case, the insulating tube 3 serves as a locking portion that comes into contact with the fastening band 7 when attached to the pipe 100. However, since the lead portion 2 is mechanically protected by the insulating tube 3, there is no particular problem.
In this way, a thermometer is formed that converts the temperature measurement value of the pipe 100 through which gas or liquid flows, and transmits it.
[0026]
Needless to say, the attachment method is not limited to the fastening band. For example, if care is taken to ensure heat conduction between the pipe and the sensor part, the sensor part 1 and the pipe 100 are closely fixed with an adhesive. can do. In this case, the fixing means is an adhesive portion by an adhesive.
Furthermore, although there are many restrictive conditions such as iron piping and magnetic shield processing, the sensor unit 1 and the piping 100 may be tightly fixed via a ferromagnetic material such as a magnet. In this case, the fixing means is an adhesive portion made of a ferromagnetic material.
These various attachment methods can be employed.
[0027]
【The invention's effect】
As described above, according to the present invention, in order to obtain temperature measurement values as various control temperature information, the temperature and temperature of the gas and liquid flowing through the inside of the pipe are not directly measured. It is possible to provide a thermometer that stably and accurately measures the temperature of the object to be measured.
Furthermore, the thermometer installation method which installs such a thermometer reliably can be provided.
[Brief description of the drawings]
FIG. 1 is an external view of a thermometer according to an embodiment of the present invention.
FIG. 2 is an internal configuration diagram of a sensor unit.
FIG. 3 is a configuration diagram of a metal base.
FIG. 4 is an explanatory diagram illustrating a communication method using a micro LAN.
FIG. 5 is an explanatory diagram illustrating a thermometer installation method according to an embodiment of the present invention.
FIG. 6 is an explanatory diagram illustrating a thermometer installation method according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sensor part 1a Temperature measurement function part 1b Correction value setting function part 1c Communication function part 1d Connector part 2 Lead part 3 Insulation tube 4 Insulation tube 5 Connection part 6 Metal base 6a Base recessed part 6b Notch part 6c Bottom part 7 Fastening band 10 Thermometer 20 Contact input unit 30 Contact output unit 40 Bus cable 50 Personal computer 100 Piping

Claims (8)

A temperature measurement function unit for measuring the temperature of the object to be measured, a correction value setting function unit for correcting the temperature measurement value measured meter houses a communication function section for performing communication via a communication line, the case or Sensor unit integrated by packaging,
A metal pedestal comprising: a pedestal recess in which the sensor unit is placed; a pair of cutouts provided on both side surfaces; and a bottom part that comes into contact with the outer peripheral surface of the pipe;
A lead part which is a communication line connected to the communication function part;
A fastening band for fastening the metal base and the lead part to the outer periphery of the pipe;
A thermometer that transmits a temperature measurement value via a lead part,
Thermometer fastening band of the metal base is characterized by Rukoto is fastened in a state of being stretched upward in a non-contact sensor unit together with entering the notch portion of the metal base. The thermometer according to claim 1, wherein
A connector part for connecting the sensor part and the lead part;
An insulating tube covering the connector part by heat shrinkage ;
A thermometer comprising: The thermometer according to claim 1 or claim 2,
The metal pedestal thermometer characterized by Rukoto formed of copper or aluminum. In the thermometer according to any one of claims 1 to 3,
The bottom surface of the bottom of the metal base is formed to the curvature substantially matching curved pipe thermometer according to claim Rukoto. In the thermometer as described in any one of Claims 1-4 ,
Silicone rubber applied to the contact surface between the bottom surface of the bottom of the metal base and the outer peripheral surface of the pipe;
Thermometer, wherein Rukoto equipped with. In the thermometer according to any one of claims 1 to 5 ,
Silicone grease filled in the base recess of the metal base,
Thermometer, wherein Rukoto equipped with. In the thermometer as described in any one of Claims 1-6 ,
The temperature measurement function section thermometer characterized by Rukoto comprises a semiconductor thermocouple. A method of installing the thermometer according to any one of claims 1 to 7 ,
A sensor part installed on a metal base and a lead part extending from the sensor part are arranged in parallel with the pipe axis direction,
Band-tighten substantially perpendicular to the pipe axis direction through a pair of notches and leads on the metal base,
A thermometer installation method characterized by closely fixing a thermometer.

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