JPH0159502B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a mounting device for a sensing element that reacts to temperature, gas, etc.

Conventional configurations and their problems In recent years, significant advances in semiconductor technology have enabled control circuits to become more sophisticated, more compact due to higher integration, and cost reductions achieved through mass production. It has come to be widely used. For example, various heating devices such as electric ovens, microwave ovens, gas ovens, and combination cookers of these have rapidly become intelligent based on electronic control. A particularly noticeable trend in heating devices is that automatic heating devices that detect the heating state of the object to be heated using various sensing elements and automatically control the heating operation have suddenly become popular. In this automatic heating device, the detection elements correspond to the five human senses and play an important role. In this way, sensing elements have come to be applied to heating devices that were previously unanticipated, and the environments in which sensing elements are used are also becoming more diverse.

Accordingly, the performance required of the sensing element has become even more severe, and it has become impossible for conventional sensing element mounting devices to adequately meet the requirements.

Hereinafter, a conventional detection element mounting apparatus will be explained using a microwave oven shown in FIG. 1 as an example.

In FIG. 1, reference numeral 1 denotes a heating chamber that is provided within the main body of the microwave oven and houses an object 2 to be heated. 3 is a high-frequency oscillator that supplies high-frequency waves into the heating chamber 1 during cooking; when this high-frequency oscillator 3 operates, a cooling fan 4 rotates to cool the high-frequency oscillator 3, etc., and heats the cooled air from the intake port 5. The air in the heating chamber 1 is sucked into the heating chamber 1 and is discharged from the exhaust port 6 through the exhaust path 7 to the outside of the main body. Reference numeral 8 denotes a sensing element which is provided in the exhaust path 7 and responds to temperature and humidity, and has an electrode 9 fixed to an insulating support plate 10 as shown in FIG.

In the above configuration, the detection element 8 provided in the exhaust path 7 detects the steam (humidity) and temperature contained in the exhaust gas and controls the operation of the high frequency oscillator 3. Due to the exposure, dew condensation water 11 is generated between the electrodes 9 of the sensing element 8, resulting in a decrease in insulation resistance, which has the disadvantage that temperature and humidity cannot be detected accurately.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to provide a detection element mounting device that can accurately detect temperature, humidity, etc. even under severe usage conditions.

Composition of the Invention In order to achieve the above object, the detection element mounting device of the present invention attaches the electrodes of the detection element to an insulated support plate, and provides a hole passing through the support plate between the electrodes of the detection element. This configuration provides excellent workability for attaching the detection element, and has the effect of being able to accurately detect temperature, humidity, gas, etc. even under harsh usage environments.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on FIGS. 3 to 6.

In FIG. 3, reference numeral 8 denotes a sensing element for detecting temperature, humidity, gas, etc., and an electrode 9 of this sensing element 8 is attached to pass through an insulating support plate 10. 12 is a through hole located between the electrodes 9 and provided in the support base 10.

In the detection element mounting device having such a configuration, even if dew condensation water 11 occurs on the support plate 10 as shown in FIG.
2, it is possible to accurately detect temperature, humidity, gas, etc. without shorting between the electrodes 9 due to water droplets.

Further, even if oil or the like adheres to the support plate 10, the through holes 12 increase the distance between the edges of the electrodes 9, so that deterioration of the insulation resistance can be prevented.

FIG. 5 shows another embodiment, in which a metal pin 13 is fixed through the support plate 10 by sandwiching a through hole 12 provided in the support plate 10, and a detection element 8 is attached to the end of the pin 13. electrode 9 is connected.

With such a configuration, the sensing element 8
Even if only a very thin electrode 9 can be taken out from the electrode 9, it can be stably attached to the support plate 10 via the pin 13.

FIG. 6 shows still another embodiment, in which a metal film 14 is formed on one side of a support plate 10 provided with through holes 12, and holes 15 are formed through the support plate 10 and the metal film 14.
The electrode 9 of the sensing element 8 is inserted into the electrode 9 and joined by soldering or the like to hold the sensing element 8.
The support plate 10 can be made in the same process as the substrate for the electronic control circuit, and the workability for attaching the detection element 8 can be improved.

Effects of the Invention As described above, according to the detection element mounting device of the present invention, the mounting workability is good and even under severe usage conditions,
The effect is that temperature, humidity, gas, etc. can be detected accurately.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing the configuration of a microwave oven, Figure 2 is a schematic diagram showing the configuration of a microwave oven.
The figure is a cross-sectional view of a conventional detection element mounting device.
FIG. 3 is a perspective view showing a detection element mounting device according to an embodiment of the present invention, and FIG.
5 is a perspective view showing a detection element mounting device according to another embodiment of the present invention; FIG. 6 is a cross-sectional view taken along line A'; FIG. 6 is a perspective view of a detection element mounting device according to yet another embodiment of the present invention. FIG. 8...Detection element, 9...Electrode, 10...Support plate, 12...Through hole (hole).

Claims (1)

[Scope of Claims] 1. A sensing element having a configuration in which electrodes of a sensing element that react to temperature, gas, etc. are fixed to an insulating support plate, and a hole passing through the support plate is provided between the electrodes of the sensing element. mounting device. 2 Claim 1 in which the sensing element is fixed via a plurality of metal pins penetrating the support plate
Mounting device for the sensing element described in . 3. The sensing element mounting device according to claim 1, wherein a metal film is provided on one side of the support plate, and the electrode of the sensing element is bonded to the metal film.