JPS5831081Y2 - heat flow meter sensor - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to the structure of a sensor for a heat flow meter.

Recently, as a measure to save energy, it has become necessary to accurately measure the amount of heat dissipated from steam piping, various heat devices, etc., and the demand for heat flow meters has increased.

As is well known, a heat flow meter is roughly divided into a sensor part that detects heat flow rate and a meter part that displays this.

Generally heat flow meter sensor (hereinafter referred to as heat flow sensor)
is constructed by embedding a thermopile consisting of a thermocouple in a flexible insulating resin with good heat resistance and a stable temperature coefficient, such as silicone rubber, but conventional heat flow sensors
A flexible insulating resin heat resistor with a thermopile attached,
Since the structure was such that it was sandwiched between a pair of dummy resin plates and integrated with adhesive, the position of the dummy resin plate would shift due to the pressure applied during gluing, damaging the appearance. In addition, there were drawbacks such as decreased reliability.

! In addition, the connection between the thermopile and the lead wire is structurally weak and requires other reinforcing means.

The present invention has been developed in view of the above points, and its purpose is to provide a heat flow sensor with a robust structure that overcomes the above-mentioned drawbacks during manufacturing and assembly.

Hereinafter, the present invention will be explained in detail using embodiments of the drawings.

FIG. 1 is a diagram showing a heat flow sensor 1 embodying the present invention, which has a three-layer structure as shown in FIG. 2.

In the figure, the thermal resistor 2 is a plate made of silicone rubber (hereinafter referred to as core rubber) to which a thermopile 3 and a thermocouple thermometer (not shown) are attached.The thermopile 3 and thermocouple thermometer are attached to the lead terminal portion. 4 to a lead wire 5 coated with silicone.

The structures of the thermopile 3 and the thermocouple thermometer, and the method of attaching them to the core rubber 2 are well known and have no direct relation to the gist of the present invention, so a detailed explanation thereof will be omitted.

The core rubber 2 is accommodated in the hollow portion 7 of a dummy silicone rubber plate 6 having the same thickness as the core rubber.

For this reason, the dummy rubber plate 6 is equipped with a core rubber 2 in advance.
A hollow portion 7 and an accommodation groove 8 for accommodating the lead wire 5 are formed in accordance with the shape of.

A flat silicone rubber sheet 9 is adhered to the surface 6a of the dummy rubber plate 6 that contacts the object to be measured.

In this case, considering that the rubber sheet 9 is a part that comes into direct contact with the object to be measured, the rubber sheet 9 is A plurality of protrusions 10 are formed in advance, and a JL11 into which the protrusions 10 are fitted is formed in a corresponding portion of the dummy rubber plate 6 and then peeled off.

A silicone rubber sheet 13 having a thick portion formed by a tapered portion 12 is adhered to the other surface 6b of the dummy rubber plate 6.

The thick portion is formed and buttoned corresponding to the lead terminal portion 4 and the lead wire 5, and is for structurally reinforcing this portion.

Fig. 3 shows the rubber sheet 9 on the rubber plate 6 for the groove □- as described above.
, 13 are glued together. After that, four through holes 14 are formed at predetermined portions of the four corners, and predetermined portions are cut off and shaped, and the boundary portion between the lead wire 5 and the sensor is By covering with a silicone shrink tube 15, the heat flow sensor 1 shown in FIG. 1 is constructed.

The through hole 14f/i: is the upper fitting 1 as shown in FIG.
Rub 6.

This stopper is used to remove dust when the heat flow sensor is attached to the surface to be measured using double-sided adhesive tape, or to press it with a jig when moving the surface to be measured one after another. , a screw 16a is formed at the upper center to fix a jig or the like.

Furthermore, in order to prevent the attachment of the stopper from affecting the contact of the heat flow sensor with the surface to be measured, the part of the stopper 16 on the measurement surface side is attached to the sensor 1, as shown in FIG. It is configured to be embedded.

Since the sensor of the heat flow meter of the present invention is as described above, the following beneficial effects can be obtained.

In other words, the structure is such that a hollow part is formed in the dummy rubber plate, and the heat resistor with the thermopile attached is housed in this hollow part, so a pair of dummy rubber plates are placed on both sides of the core rubber, as in the past. Compared to the case where the dummy rubber plate protrudes even if pressure is applied during bonding, this problem does not occur.

In addition, since the rubber sheet to be adhered to the measurement surface side and the dummy rubber plate have an engaging structure, the rubber sheet does not slip during adhesion, and accurate and reliable adhesion can be performed.

Furthermore, a thick section is formed on the rubber sheet that adheres to other surfaces,
Since the connection portion of the lead wire is protected by this thick portion, breakage of the lead wire can be prevented without using any other reinforcing means.

In the above example, silicone rubber was used as the flexible insulating resin, but the invention is not limited to this. It goes without saying that other resins, paper, cork, and other natural or inorganic materials may be used as long as they meet the standards.

As mentioned above, the heat flow meter sensor of the present invention has various advantages over conventional sensors of this type, so by applying it to this type of equipment, which will be in increasing demand in the future, Very useful practical effects are obtained.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a sensor of a heat flow meter implementing the present invention, where a is a top view, b is a side view thereof, and Fig. 2 explains the structure of the sensor of the heat flow meter shown in Fig. 1. An exploded perspective view of FIG. 3 shows a rubber sheet 9 on both sides of the core rubber 60.
．． Figure 4 shows the state in which the fasteners 13 and 13 are glued together.
6, FIG. 5 is a sectional view showing the state in which the stopper is attached to the sensor 1. In the figure, 1 is a sensor, 2 is a core rubber, 6 is a dummy rubber plate, 9 and 13 are rubber sheets, and 16 is a stopper.

Claims (3)

[Scope of utility model registration request] (1) A plate-shaped thermal resistor made of flexible insulating resin on which a thermopile is deposited, a flexible insulating resin plate for a dummy having a hollow portion for accommodating the thermal resistor, and the resin plate. It consists of a flexible insulating resin sheet that is adhered to both sides of the
Among the resin sheets, a resin sheet to be adhered to the measurement surface side is formed to have a retaining structure with the resin plate, and
A sensor for a heat flow meter, characterized in that a predetermined portion of the resin sheet that is adhered to the other surface is formed thick, and the thick portion protects the connecting portion between the thermopile and the lead wire. (2) The heat flow meter sensor according to claim 1, wherein the flexible insulating resin is silicone rubber. (3) The engagement structure is a structure in which a protrusion is formed on the insulating resin sheet, a fitting hole is formed in the insulating resin plate, and the protrusion is fitted into the fitting hole. A sensor for a heat flow meter according to Items 1 and 2.