JPH05180723A - Device for detecting defect of hot water tube in hot water mat - Google Patents

Abstract

PURPOSE:To enable penetration of a nail from a flooring material through a hot water tube of a hot water mat to be easily detected at the time of execution by laying a conductive sheet on a surface of the hot water mat and detecting electrical connection between hot water in the hot water tube and the conductive sheet. CONSTITUTION:A hot water tube 11 is provided on the whole hot water mat 10 and a conductive sheet 12 is laid on the surface. When the mat 10 is placed and fixed onto a floor surface 13, a flooring material 14 of a flooring is placed and is fixed by a fixing member such as a nail 15. In this case, a signal wire 17 for detection of a detection circuit 16 which is used to detect electrical connection between a hot water in the hot water tube 11 and the sheet 12 is connected. Then, when the nail 15 penetrates through the hot water tube 11, a small amount of current flows between the hot water in the hot water tube and the sheet 12 according to conductivity of water. Thus a small amount of current is detected using the detection circuit 16 and amplified by an operational amplifier 18 to be outputted. The collector terminal 21 and the emitter terminal 24 of a transistor 19 are connected, thus enabling a light- emitting diode 22 and a buzzer 23 to be actuated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water pipe damage detection device for a hot water mat, which is capable of promptly detecting damage to a pipe arranged in the hot water mat and preventing accidents such as water leakage. is there.

[0002]

2. Description of the Related Art For example, as shown in FIG.
When the hot water mat 2 is installed on the floor surface 3 in a floor heating installation in which (cross-linked polyethylene) is spread over the entire surface, the hot water mat 2 is laid on the floor surface 3 and the flooring material 4 is nailed on the floor material 4. , I am trying to fix it. During the work, the hot water pipe 1 in the hot water mat 2 is visually checked and nailed while avoiding the position, but the hot water pipe 1 is accidentally stabbed and damaged. There was a cause of water leakage. Therefore, at the time of construction, air is previously injected into the hot water pipe 1 to a predetermined air pressure (for example, 3 kg / cm ² ), and the value of the air pressure is measured by the air pressure gauge 6
By monitoring the value, the value drops, and it is detected that the nail pierces the hot water pipe and causes air leakage.

[0003]

However, since the hot water pipe is stretchable, even if a nail is stuck in the hot water pipe, the air may not immediately leak and the gauge may not be lowered immediately. If the construction is completed as it is, and if changes or deterioration progresses as a result, water will leak from the hot water pipes, which may damage the floor or the like. The present invention has been made in view of the above problems, and an object of the present invention is to provide a damage detection device for a hot water pipe in a hot water mat, which is provided with a detection means that utilizes the conductivity of water.

[0004]

In order to solve the above-mentioned problems, the present invention provides a floor heating device having a hot water mat having hot water pipes, wherein a conductive sheet is laminated on the surface of the hot water mat. It is characterized in that a detection circuit for detecting whether a nail or the like has penetrated the hot water pipe is provided by detecting the conduction state between the hot water in the hot water pipe and the conductive sheet.

[0005]

Function: Conductivity between the conductive sheet on the surface of the hot water mat and the hot water flowing through the hot water pipe is monitored. That is, when a low voltage is applied between the conductive sheet from the detection circuit and the hot water flowing in the hot water pipe as compared to a commercial power supply, and a minute current flows, the nails are heated from the floor plate to the hot water in the detection circuit. It is possible to take out a detection signal indicating that the hot water pipe of the mat is penetrated.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a hot water pipe damage detecting device in a hot water mat according to the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a hot water mat that constitutes a floor heating device.
The hot water pipe 11 is arranged so as to cover the entire surface. In addition, the conductive sheet 12 is provided on the surface of the warm water mat 10.
(Aluminum) is laminated. Such warm water mat 10
When laying and fixing the floor surface 13, the warm water mat 10
The flooring material 14, which is one of the floor boards, is placed so as to cover the
At this time, the hot water in the hot water pipe 11 and the detection signal line 1 of the detection circuit 16 for detecting the conductive state of the conductive sheet 12
7 is connected. That is, nail 15
When the water penetrates the hot water pipe 11, a minute current flows between the hot water in the hot water pipe 11 and the conductive sheet 12 due to the conductivity of water, and this minute current is amplified and notified. is there. Note that 34% of a propylene glycol aqueous solution is used as the hot water in the hot water pipe 11.

Next, an example of the detection circuit 16 is shown in FIG.
That is, the detection circuit 16 includes the detection signal line 17 connected to the hot water in the hot water pipe 11 and the conductive sheet 12.
Are respectively connected to the + -input side of the operational amplifier 18, the base terminal 20 of the transistor 19 is connected to the output side of the operational amplifier 18, the light emitting diode 22 and the buzzer 23 as the notification means are connected to the collector terminal 21, and the emitter terminal is connected. A direct current power source (DC 9V) is connected between the collector terminal 24 and the collector terminal 21 via the light emitting diode 22 and the buzzer 23.

In the hot water pipe damage detecting device for the hot water mat 10 as described above, when the nail 15 penetrates the hot water pipe 11 during construction, the conductive sheet 12 and the hot water flowing through the hot water pipe 11 are separated from each other. A short circuit occurs, and hot water has conductivity (resistance value of 1 to 4 MΩ), so a minute current flows. When a potential difference is generated between the detection signal lines 17 and taken into the operational amplifier 18, it is taken out as a detection current from the output side and supplied to the base terminal 20 of the transistor 19.
Then, the collector terminal 21 and the emitter terminal 24 of the transistor 19 become conductive, and the light emitting diode 2
2 and the buzzer 23 are operated by an electric current, and the nail 15 moves from the flooring material 14 to the hot water pipe 11 of the hot water mat 10.
You can easily know that you have passed.

(Effect of the invention) As described above, according to the present invention, it is possible to reliably detect damage to the pipe during construction. Therefore, after completion, sudden leakage due to deterioration of the hot water pipe over time, etc. ,
Accidents such as damage to furniture can be eliminated. Since it is possible to instantly know that the nail is pierced, the repair work can be done quickly at the time of construction, and unnecessary expenses can be eliminated. You can concentrate on this work and improve work efficiency.

[0010]

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a place where a hot water pipe damage detection device in a hot water mat according to the present invention is applied.

FIG. 2 is a circuit diagram showing an example of a detection circuit applied to FIG.

FIG. 3 is a diagram illustrating a conventional detection method.

[Explanation of symbols]

 10 hot water mat 11 hot water pipe 12 conductive sheet 13 floor surface 14 flooring material 15 nails 16 detection circuit 17 detection signal line 18 operational amplifier 19 transistor 20 base terminal 21 collector terminal 22 light emitting diode 23 buzzer 24 emitter terminal

Claims (1)

[Claims] 1. A floor heating device having a hot water mat having hot water pipes stretched, a conductive sheet is laminated on a surface of the hot water mat, and hot water in the hot water pipe and a conduction state between the conductive sheets are detected. Accordingly, the damage detection device for the hot water pipe in the hot water mat, comprising a detection circuit for detecting that a nail or the like has penetrated the hot water pipe.