JPS60273A - Detector for frost - Google Patents
Detector for frostInfo
- Publication number
- JPS60273A JPS60273A JP10115584A JP10115584A JPS60273A JP S60273 A JPS60273 A JP S60273A JP 10115584 A JP10115584 A JP 10115584A JP 10115584 A JP10115584 A JP 10115584A JP S60273 A JPS60273 A JP S60273A
- Authority
- JP
- Japan
- Prior art keywords
- light
- frost
- optical transmission
- section
- evaporator
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/11—Sensor to detect if defrost is necessary
- F25B2700/111—Sensor to detect if defrost is necessary using an emitter and receiver, e.g. sensing by emitting light or other radiation and receiving reflection by a sensor
Landscapes
- Defrosting Systems (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明Ｕ、冷蔵庫等の蒸発器に付着する霜を光学的に検
知する霜検知装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention U relates to a frost detection device that optically detects frost adhering to an evaporator of a refrigerator or the like.
一般に冷蔵庫等冷凍機の蒸発器に付着した霜の除去は、
圧縮機運転時間積算により一定時間毎に除霜を行うもの
てあ−）だ。ところが冷蔵１１１′等の蒸発器への着霜
量は冷１代原本体外気温や湿度、冷蔵庫本体のドア開閉
！Ｍ度、又冷蔵庫内に貯蔵され、る内容物に大きくか右
され、上記の様な方法では除１“６の不必安時に除’ｌ
ｆ４ を行ったり、蒸発器に多量に着Ｗｉｊ Ｌ冷凍能
力が低十しているにもかかわらす除霜が適切に行われな
い等の欠点があった。Generally, removing frost from the evaporator of refrigerators and other freezers is done by
It defrosts the air at regular intervals based on the cumulative operating time of the compressor. However, the amount of frost on the evaporator of the refrigerator 111' etc. depends on the outside temperature and humidity of the refrigerator itself, as well as the opening and closing of the refrigerator door! It depends largely on the contents stored in the refrigerator, and the method described above will not remove it in case of emergency.
However, there were drawbacks such as defrosting not being carried out properly despite the low refrigerating capacity of the evaporator.
そこで、この様な欠点を解消するために、着絹全直接検
知する手段として、フィン間に光学式検知器を設けるこ
とが考えられてきたが、フィン間隔が極めて狭いので検
出器全非常に小さく形成しなければならないこと、寸だ
検出器として半導体素子を用いる場合、冷却運転時には
蒸発器本体温度が零下４０°Ｃ１でも低下し除霜時には
６０°Ｃに達する厳しい温度差条件であるため半導体素
子に過酷な耐寒性と耐熱衝撃性が要求される等の問題が
あるため今葦で実用化されていないのが現状である。Therefore, in order to eliminate this drawback, it has been considered to install an optical detector between the fins as a means of directly detecting all the silk deposits, but since the fin spacing is extremely narrow, the entire detector is very small. When using a semiconductor element as a size detector, the temperature of the evaporator body drops to -40°C during cooling operation and reaches 60°C during defrosting, which is a severe temperature difference condition. Currently, it has not been put into practical use in reeds due to problems such as the requirement for severe cold resistance and thermal shock resistance.
本発明はこの様な欠点を除去することを目的としたもの
であり、以下その一実施例を添付図面により説明する。The present invention aims to eliminate such drawbacks, and one embodiment thereof will be described below with reference to the accompanying drawings.
第１図において、１は冷蔵庫等冷凍機の蒸発器であり、
２は冷媒の通るパイプ、３はこのパイプに直交して配設
されたフィンプレート、４はフィンプレートに設けた霜
検知孔、６は前記霜検知孔４を介して互いに相対向して
平行に設けられた光の授受を行う光伝送体を有する霜検
知器であり、霜検知孔４における着霜進行による通過光
量の変化を検知して除霜指令を行うものである。In Fig. 1, 1 is an evaporator of a refrigerator or other freezer;
2 is a pipe through which the refrigerant passes; 3 is a fin plate disposed perpendicular to the pipe; 4 is a frost detection hole provided in the fin plate; This is a frost detector having a light transmitting body provided for transmitting and receiving light, and issues a defrosting command by detecting a change in the amount of passing light due to progress of frost formation in the frost detection hole 4.
すなわち第２図及び第３図において上記霜検知器５を更
に詳述する。前記霜検知器５は光を送受する光送受部６
と、この光送受部からの光を伝送せしめる光伝送部７か
ら構成されている。前記光送受部６は発光側］にランプ
等の光源８を設は受光側に硫化カドミウム光電池等の受
光素子９を設けである。あるいは発光受光に発光ダイオ
ード、ホトトラノジスタ等の半導体素子を用いる方法も
ある。寸だ前記光伝送部７は透明樹脂製であり、発光側
光伝送体１０と受光側光伝送体１１が平行に配置されて
いる。上記光伝送部Ｙの両先端を図に示す如く４５度に
切削することにより、光伝送部７を伝わる光１２が伝送
部内で切削面１３に対して４５度で入射し同じく４５度
で反射するため、上記発光側光伝送体１０の発光部１４
において、光伝送部外へは光伝送部７に直交して光が伝
達されるので、受光側光伝送体１１の受光部１５におい
て光が光伝送部７に対して直交して入射し、切削面１３
で反射した後、光伝送部γ内を伝わって受光素子９に達
する。That is, the frost detector 5 will be explained in further detail in FIGS. 2 and 3. The frost detector 5 includes an optical transmitting/receiving section 6 that transmits and receives light.
and an optical transmission section 7 that transmits the light from this optical transmission/reception section. The light transmitting/receiving section 6 has a light source 8 such as a lamp on the light emitting side and a light receiving element 9 such as a cadmium sulfide photocell on the light receiving side. Alternatively, there is a method of using a semiconductor element such as a light emitting diode or a phototransistor for emitting and receiving light. The light transmitting section 7 is made of transparent resin, and the light transmitting body 10 on the light emitting side and the light transmitting body 11 on the light receiving side are arranged in parallel. By cutting both ends of the optical transmission part Y at 45 degrees as shown in the figure, the light 12 transmitted through the optical transmission part 7 enters the cut surface 13 at 45 degrees within the transmission part and is reflected at the same 45 degrees. Therefore, the light emitting section 14 of the light emitting side optical transmission body 10
In this case, since the light is transmitted to the outside of the optical transmission section orthogonally to the optical transmission section 7, the light enters the optical transmission section 7 at right angles to the light receiving section 15 of the light receiving side optical transmission body 11, and the cutting Face 13
After being reflected, the light travels through the light transmission section γ and reaches the light receiving element 9.
上記発光部１４及び受光部１５以外の光伝送部７からの
光の漏れを防ぐのと切削面１３での反射を確実なものに
するために（は、光伝送部７の発光部１４及び受光部１
５のみを残して光伝送郡全体にアルミニウム等全蒸着さ
せる手段が有効である５、前記光伝送部７の長さを十分
長くとることにより前記光源８及び受光素子９を蒸発器
１と離れた任意の場所に設置することができるので耐寒
性及び耐熱衝撃性等の問題が解消される。寸だ、光伝送
部７と光送受部６は十分小柳化することかり能であるの
で、蒸発器のフィン間等の極めて狭い場所での動作も可
能になる。寸だ光の授受を行う前記発光部１４及び受光
部１５の面積が小さいので光軸を細く絞ることが可能で
あり、光の散乱も極めて小さくできるので、常に安定し
て非常に確実に着霜を検知することができる。In order to prevent the leakage of light from the light transmitting section 7 other than the light emitting section 14 and the light receiving section 15 and ensuring the reflection on the cutting surface 13, Part 1
It is effective to fully evaporate aluminum or the like over the entire optical transmission group, leaving only the light transmitting section 5. By making the length of the optical transmitting section 7 sufficiently long, the light source 8 and the light receiving element 9 can be separated from the evaporator 1. Since it can be installed at any location, problems such as cold resistance and thermal shock resistance are solved. In fact, the optical transmitting section 7 and the optical transmitting/receiving section 6 can be made sufficiently small so that they can operate in extremely narrow spaces such as between the fins of an evaporator. Since the areas of the light emitting section 14 and the light receiving section 15, which transmit and receive light, are small, it is possible to narrow down the optical axis, and the scattering of light can also be minimized, so that frosting is always stable and very reliable. can be detected.
以上の説明からも明らかな如く本発明の霜検知装置は、
蒸発器に設けた霜検知孔に相対向して一対の光伝送体を
配置し、この光伝送体の先端を、前記検知孔と相反する
側がテーパ状になる様切削し、かつ光伝送体の後端にそ
れぞれ発光源、受光源を配置したものであるから、発光
、受光の各源を寒暖から護ることができると共に光伝送
体、上記各源の小型化、そして細光化により精度良く着
霜を検知して除霜を行うという優れた効果がある。As is clear from the above explanation, the frost detection device of the present invention is
A pair of optical transmission bodies is arranged opposite to the frost detection hole provided in the evaporator, and the tip of the optical transmission body is cut so that the side opposite to the detection hole is tapered, and the optical transmission body is Since the light emitting source and light receiving source are placed at the rear end, the light emitting and light receiving sources can be protected from cold and heat, and the optical transmitter and each of the above sources can be miniaturized and the light beam can be made thinner, allowing for more accurate landing. It has an excellent effect of detecting frost and defrosting it.
第１図は本発明一実施例の霜検出装置Ｎヲ有する冷凍室
一部の平面図、第２図は同装置の分解斜視図、第３図は
同装置の動作を説明する平面図である。
４・ 霜検知孔、１０，１１・・ 光伝送体、８・ 発
光源、９ 受光素子（受光源）。
代理人の氏名 弁理士 中 尾 敏 男 はが１名第１
図
第３図FIG. 1 is a plan view of a part of a freezing chamber equipped with a frost detection device N according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the device, and FIG. 3 is a plan view illustrating the operation of the device. . 4. Frost detection hole, 10, 11... optical transmission body, 8. light emitting source, 9 light receiving element (light receiving source). Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 3
Claims (1)
配置し、この伝送体の先端を前記検知孔と相反する側が
テーパ状になる様切削し、かつ光伝送体の後端にそれぞ
れ発光源、受光源を配置したことを特徴とする霜検知装
置。A pair of optical transmission bodies are arranged opposite to the frost detection holes provided in the evaporator, and the tips of the optical transmission bodies are cut so that the side opposite to the detection holes is tapered, and the rear end of the optical transmission bodies is A frost detection device characterized in that a light-emitting source and a light-receiving source are respectively arranged in the respective parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10115584A JPS60273A (en) | 1984-05-18 | 1984-05-18 | Detector for frost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10115584A JPS60273A (en) | 1984-05-18 | 1984-05-18 | Detector for frost |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60273A true JPS60273A (en) | 1985-01-05 |
| JPH0156357B2 JPH0156357B2 (en) | 1989-11-29 |
Family
ID=14293154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10115584A Granted JPS60273A (en) | 1984-05-18 | 1984-05-18 | Detector for frost |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60273A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6351887A (en) * | 1986-08-20 | 1988-03-04 | 鶴沢 三十喜 | Square sail and fore-and-aft sail operation apparatus of model sailboat |
| US4960581A (en) * | 1988-03-16 | 1990-10-02 | Mitsui Toatsu Chemicals, Inc. | Method for preparing gaseous metallic fluoride |
-
1984
- 1984-05-18 JP JP10115584A patent/JPS60273A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6351887A (en) * | 1986-08-20 | 1988-03-04 | 鶴沢 三十喜 | Square sail and fore-and-aft sail operation apparatus of model sailboat |
| US4960581A (en) * | 1988-03-16 | 1990-10-02 | Mitsui Toatsu Chemicals, Inc. | Method for preparing gaseous metallic fluoride |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0156357B2 (en) | 1989-11-29 |
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