JPS6144143Y2 - - Google Patents
Info
- Publication number
- JPS6144143Y2 JPS6144143Y2 JP17741681U JP17741681U JPS6144143Y2 JP S6144143 Y2 JPS6144143 Y2 JP S6144143Y2 JP 17741681 U JP17741681 U JP 17741681U JP 17741681 U JP17741681 U JP 17741681U JP S6144143 Y2 JPS6144143 Y2 JP S6144143Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- frost
- emitting element
- receiving element
- light emitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011148 porous material Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000011521 glass Substances 0.000 description 5
- 238000010257 thawing Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Defrosting Systems (AREA)
Description
【考案の詳細な説明】
従来、冷蔵庫や冷凍庫において光を利用した霜
センサを備えたものがあるが、此の種の霜センサ
ではドアの開閉によつて湿つた空気が庫内に流入
すると、発光素子及び受光素子の窓が曇るという
問題と除霜時に上記窓に水滴が付着するという問
題があつた。[Detailed description of the invention] Conventionally, some refrigerators and freezers are equipped with a frost sensor that uses light, but this type of frost sensor detects when moist air enters the refrigerator when the door is opened or closed. There was a problem that the windows of the light-emitting element and the light-receiving element became foggy, and that water droplets adhered to the windows during defrosting.
以下従来の霜センサについて説明すると、１は
アルミニユウムの如き伝導率の大きい材料からな
る基台、２は発光ダイオードの如き発光素子、３
はフオトトランジスタの如き受光素子、４はアル
ミニウム等の熱伝導率の大きい遮光性の材料から
なる霜形成体、５，６は熱伝導率の小さい合成樹
脂等からなる取付具である。 A conventional frost sensor will be explained below. 1 is a base made of a material with high conductivity such as aluminum, 2 is a light emitting element such as a light emitting diode, and 3 is a base made of a material with high conductivity such as aluminum.
Reference numeral 4 indicates a light-receiving element such as a phototransistor; 4 is a frost forming body made of a light-shielding material with high thermal conductivity such as aluminum; and 5 and 6 are fixtures made of synthetic resin or the like with low thermal conductivity.
そして、上記発光素子２及び受光素子３は基台
１上に霜形成体４を挾む如く取付具５，６により
固定されている。又、上記霜形成体４の上端部は
発光素子２と受光素子３とを結ぶ光軸７より若干
低くなるように設定されている。 The light emitting element 2 and the light receiving element 3 are fixed on the base 1 with fixtures 5 and 6 so as to sandwich the frost forming body 4. Further, the upper end of the frost forming body 4 is set to be slightly lower than the optical axis 7 connecting the light emitting element 2 and the light receiving element 3.
従つて、霜形成体４に霜が付着していない状態
では発光素子２からの光は何等遮断されることな
く受光素子３へ到達するが、霜が霜形成体４の上
端縁に形成されると発光素子２からの光が遮断さ
れ、このため受光素子３が検知する光量が減少し
霜が所定量形成されたことを検知する。 Therefore, when no frost is attached to the frost forming body 4, the light from the light emitting element 2 reaches the light receiving element 3 without being blocked in any way, but frost is formed on the upper edge of the frost forming body 4. The light from the light emitting element 2 is blocked, and therefore the amount of light detected by the light receiving element 3 decreases, and it is detected that a predetermined amount of frost has formed.
ところが、冷蔵庫や冷凍庫等の低温で且つ低温
度の空気が流入すると、低温の部分の表面に微少
の水滴が付着し、これが霜センサの出力電圧を低
下させたり、検出着霜量のばらつきを大きくした
りする原因となつていた。 However, when low-temperature air flows into a refrigerator or freezer, minute water droplets adhere to the surface of the low-temperature parts, which can lower the output voltage of the frost sensor and greatly increase the variation in the amount of detected frost. It was causing people to do things like that.
即ち、上記霜センサは時間が経つにつれて霜が
成長し、発光素子２から受光素子３への光を遮断
して、受光素子２の出力電圧が減少し、ある一定
の出力電圧以下となつた時に除霜すべき量の霜が
冷却器に付着したことを検知するものである。 That is, the frost sensor detects when frost grows over time and blocks light from the light emitting element 2 to the light receiving element 3, and the output voltage of the light receiving element 2 decreases to below a certain output voltage. This detects when the amount of frost that should be defrosted has adhered to the cooler.
ところがドアの開閉によつて発光素子２及び受
光素子のガラス製レンズの窓が曇り、第２図に示
す如くａを検出レベルにした場合にはｉ〜ｎのよ
うな出力の低下により互動作するという欠点が有
り、また上記窓に水滴が付着することによりｂ〜
ｅに示す如く除霜時のレベルが徐々に低下し霜検
出レベルのバラツキの原因となるという欠点が有
つた。そこで、従来ガラス窓の曇り及び水滴の付
着の対処策として、発光素子２及び受光素子３を
長筒体内に配設するようにしたものがあるが、此
の種のものでは除霜時に筒体の内側に水が侵入し
て該水が光を遮断するという新な問題が生じてき
た。尚i1〜n1は冷蔵庫のドア開成時点である。 However, when the door is opened and closed, the windows of the glass lenses of the light emitting element 2 and the light receiving element become foggy, and when a is set to the detection level as shown in FIG. There is a disadvantage that b~
As shown in e, there was a drawback that the level during defrosting gradually decreased, causing variations in the frost detection level. Therefore, as a conventional measure against fogging and adhesion of water droplets on glass windows, there is a method in which the light emitting element 2 and the light receiving element 3 are arranged inside a long cylinder. A new problem has arisen in that water enters the inside of the device and blocks light. Note that i 1 to n 1 are the times when the door of the refrigerator is opened.
本考案は上述欠点を除去すべく考案されたもの
で、以下図示の一実施例について詳細に説明す
る。尚、本考案のものと従来例のものとの同一部
分は同一符号で示す。 The present invention has been devised to eliminate the above-mentioned drawbacks, and an embodiment shown in the drawings will be described in detail below. Incidentally, the same parts between the present invention and the conventional example are indicated by the same reference numerals.
第３図に於いて、基台１の上面中央部に霜形成
体４を設置し、該霜形成体の左右両側に相対向し
て取付具５，６により円筒状の中空体８，９を取
り付けている。該中空体８，９は吸水性が良く空
気を通しにくい多孔性の材料からなり、該中空体
８，９の末端部側にはガラス窓を有する発光素子
２及び受光素子３を内装している。 In FIG. 3, a frost forming body 4 is installed at the center of the upper surface of the base 1, and cylindrical hollow bodies 8, 9 are mounted on opposite sides of the frost forming body by means of fixtures 5, 6. It is installed. The hollow bodies 8 and 9 are made of a porous material that has good water absorption properties and is difficult for air to pass through, and a light emitting element 2 and a light receiving element 3 each having a glass window are housed at the ends of the hollow bodies 8 and 9. .
従つて、上記発光素子２及び受光素子３は中空
体８，９の奥まつた所に位置するため空気の流通
が悪く、このためドアの開閉等によつて湿度の高
い空気が冷蔵庫或いは冷凍庫内に流入した場合で
も、中空体８，９内には湿度の高い空気が流れ込
みにくく、その分だけ発光素子２及び受光素子３
のガラス窓の曇りが抑制されることとなり、霜セ
ンサの信頼性が向上される。又、除霜時に中空体
８，９内に水が侵入した場合でも中空体８，９が
多孔性の材質からなるため水を吸収し従来のよう
に水によつて光が遮断されるということはなくな
る。 Therefore, since the light-emitting element 2 and the light-receiving element 3 are located deep inside the hollow bodies 8 and 9, air circulation is poor, and therefore, when the door is opened or closed, high-humidity air may enter the refrigerator or freezer. Even if the air flows into the hollow bodies 8 and 9, it is difficult for highly humid air to flow into the hollow bodies 8 and 9, and the light emitting element 2 and the light receiving element 3 are affected accordingly.
fogging of the glass windows is suppressed, and the reliability of the frost sensor is improved. Furthermore, even if water enters the hollow bodies 8 and 9 during defrosting, the hollow bodies 8 and 9 are made of porous material, so they absorb the water and the light is blocked by the water as in the conventional case. will disappear.
本考案は、以上の如く発光素子と受光素子との
間に熱伝導率の大きい霜形成体を設置した霜セン
サに於いて、上記発光素子及び受光素子を多孔性
の材料からなる中空体で囲繞したものであるか
ら、ドアの開閉等によつて湿度の高い空気が庫内
に流入しても霜センサはこの湿度の高い空気に直
接接触することがなくガラス窓の曇りが抑制され
ると共に、除霜時に中空体内に水が侵入しても多
孔質性の材料からなる中空体に吸収されるために
発光素子からの光を遮断することがないので従来
のような誤動作の心配がなく、商品の信頼性を大
巾に向上することができる他、その構造に於いて
も発光素子及び受光素子を多孔質性の材料からな
る中空体で囲繞するだけで良いので極めて構造簡
単且つ安価に製作することができるという顕著な
効果を奏し得るものである。 The present invention provides a frost sensor in which a frost forming body with high thermal conductivity is installed between a light emitting element and a light receiving element as described above, in which the light emitting element and the light receiving element are surrounded by a hollow body made of a porous material. Therefore, even if high-humidity air flows into the refrigerator by opening and closing the door, the frost sensor does not come into direct contact with this high-humidity air, and the fogging of the glass windows is suppressed. Even if water enters the hollow body during defrosting, it is absorbed by the hollow body made of porous material and does not block the light from the light emitting element, so there is no need to worry about malfunctions like in the past, and the product can be improved. Not only can the reliability of the device be greatly improved, but also its structure is extremely simple and inexpensive since it is only necessary to surround the light-emitting element and the light-receiving element with a hollow body made of porous material. This has the remarkable effect of being able to.
第１図は従来霜センサの外観斜視図、第２図は
従来霜センサの出力電圧と時間との特性図、第３
図は本考案霜センサの外観斜視図、第４図は本考
案の霜センサの出力電圧と時間との特性図を示
す。
２：発光素子、３：受光素子、４：霜形成体、
８，９：中空体。
Figure 1 is an external perspective view of a conventional frost sensor, Figure 2 is a characteristic diagram of the output voltage versus time of the conventional frost sensor, and Figure 3 is a diagram of the characteristics of the output voltage and time of the conventional frost sensor.
The figure is a perspective view of the appearance of the frost sensor of the present invention, and FIG. 4 is a characteristic diagram of the output voltage versus time of the frost sensor of the present invention. 2: light emitting element, 3: light receiving element, 4: frost forming body,
8, 9: Hollow body.
Claims (1)
遮光性の霜形成体を設置した霜センサに於いて、
上記発光素子及び受光素子を多孔質性の材料から
なる中空体で囲繞した事を特徴としてなる霜セン
サ。 In a frost sensor in which a light-shielding frost-forming body with high thermal conductivity is installed between a light-emitting element and a light-receiving element,
A frost sensor characterized in that the light emitting element and the light receiving element are surrounded by a hollow body made of a porous material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17741681U JPS5881484U (en) | 1981-11-28 | 1981-11-28 | frost sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17741681U JPS5881484U (en) | 1981-11-28 | 1981-11-28 | frost sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5881484U JPS5881484U (en) | 1983-06-02 |
| JPS6144143Y2 true JPS6144143Y2 (en) | 1986-12-12 |
Family
ID=29971277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17741681U Granted JPS5881484U (en) | 1981-11-28 | 1981-11-28 | frost sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5881484U (en) |
-
1981
- 1981-11-28 JP JP17741681U patent/JPS5881484U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5881484U (en) | 1983-06-02 |
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