JPH0221746Y2 - - Google Patents
Info
- Publication number
- JPH0221746Y2 JPH0221746Y2 JP1396682U JP1396682U JPH0221746Y2 JP H0221746 Y2 JPH0221746 Y2 JP H0221746Y2 JP 1396682 U JP1396682 U JP 1396682U JP 1396682 U JP1396682 U JP 1396682U JP H0221746 Y2 JPH0221746 Y2 JP H0221746Y2
- Authority
- JP
- Japan
- Prior art keywords
- defrosting
- frost
- heat exchanger
- detector
- relay
- 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
- 238000010257 thawing Methods 0.000 claims description 46
- 238000001514 detection method Methods 0.000 claims description 9
- 230000010355 oscillation Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
Landscapes
- Defrosting Systems (AREA)
Description
【考案の詳細な説明】
本考案は冷蔵庫などの冷却器に付着した霜を検
知して除霜を行なう除霜制御装置に関するもので
ある。[Detailed Description of the Invention] The present invention relates to a defrosting control device that detects frost adhering to a cooler such as a refrigerator and defrosts it.
従来、熱交換器の霜付量を検出して除霜をする
手段として、圧電体薄板を振動させて、振動の変
化を検出して除霜をするといつた霜検出装置が特
開昭54−32852号公報にて知られている。 Conventionally, as a means of detecting the amount of frost on a heat exchanger and defrosting it, a frost detection device was developed in Japanese Patent Application Laid-Open No. 1983-1981, which vibrates a piezoelectric thin plate and defrosts the heat exchanger by detecting changes in vibration. It is known from Publication No. 32852.
また、霜検知装置に付着した霜を除去するため
に、ヒーターを内蔵することは実開昭53−68288
号公報にて明らかである。 In addition, in order to remove the frost that has adhered to the frost detection device, a built-in heater was developed.
It is clear from the publication.
しかしながら、これら除霜制御では、除霜終了
直後に熱交換器の冷媒管等かの水滴が落下して、
霜検知器表面に付着し、これが冷却運転再開後氷
結して再び霜付着と同じ状態になつて不必要な除
霜を行なうという実用上の問題があり、又、除霜
開始当初は霜検知器の発熱量が熱交換器側に奪わ
れてしまい本来の霜検知器に付着した霜を溶かし
て蒸発させるという機能を有効に果せず、省エネ
ルギー上の問題もあつた。 However, with these defrosting controls, water droplets fall from the refrigerant pipes of the heat exchanger immediately after the defrosting ends.
There is a practical problem in that this adheres to the surface of the frost detector, freezes after the cooling operation is restarted, and becomes the same state as frost, causing unnecessary defrosting. The heat generated by the frost detector was taken away by the heat exchanger, making it unable to effectively perform its original function of melting and evaporating the frost that adhered to the frost detector, which also caused problems in terms of energy conservation.
本考案は上記欠点を無くした熱交換器の除霜制
御装置を提供するもので、以下、本考案の一実施
例を図面により説明する。 The present invention provides a defrosting control device for a heat exchanger that eliminates the above-mentioned drawbacks, and one embodiment of the present invention will be described below with reference to the drawings.
第１図は霜検知器を熱交換器に取付けた状態を
示す断面図である。 FIG. 1 is a sectional view showing a frost detector attached to a heat exchanger.
１は霜検知器で、振動面２には圧電素子３を貼
り付けてあり、内部には振動面２に付着した霜を
除霜する検知器除霜用ヒーター４がモールド材５
で固定されている。この霜検知器１は熱伝導性の
良い取付具６で空気が強制循環される熱交換器７
の一部に取り付けられている。この熱交換器７は
詳しくは図示しないが周知のフインチユーブ型熱
交換器であり、後述する冷凍機２１等と共に冷蔵
庫として冷凍サイクルを構成するものである。ま
たこの熱交換器７には付着した霜を除霜する周知
の熱交換器除霜用ヒーター１８が熱交換するよう
設けられている。 Reference numeral 1 designates a frost detector, in which a piezoelectric element 3 is attached to a vibrating surface 2, and a detector defrosting heater 4 for defrosting frost attached to the vibrating surface 2 is mounted inside a molded material 5.
is fixed. This frost detector 1 is equipped with a heat exchanger 7 in which air is forcedly circulated using a fitting 6 with good thermal conductivity.
attached to a part of the Although not shown in detail, this heat exchanger 7 is a well-known Finch-Hube type heat exchanger, and together with a refrigerator 21 and the like, which will be described later, constitutes a refrigeration cycle as a refrigerator. Further, the heat exchanger 7 is provided with a well-known heat exchanger defrosting heater 18 for defrosting adhering frost for heat exchange.
すなわち、冷蔵庫（冷凍サイクル）の運転時間
経過とともに熱交換器７への着霜が進み、それと
並行して霜検知器１への着霜が進んで、振動面２
へも霜が成長し、圧電素子３による発振を機械的
に阻止して霜検知を行なうもので、除霜時、振動
面２の霜は検知器除霜用ヒーター４で強制的に蒸
発させる構造となつている。 That is, as the operating time of the refrigerator (refrigeration cycle) passes, frost buildup on the heat exchanger 7 progresses, and in parallel, frost buildup progresses on the frost detector 1, causing the vibration surface 2
Frost is detected by mechanically blocking the oscillation caused by the piezoelectric element 3 when frost grows on the surface. During defrosting, the frost on the vibrating surface 2 is forcibly evaporated by the detector defrosting heater 4. It is becoming.
次に第２図に除霜制御装置としての電気回路を
示す。L1，L2は交流電源、８は制御回路用直流
電源、９は発振回路で、前記霜検知器１を一定の
発振レベルで発振させるものである。１０は検知
回路で、前記霜検知器１が着霜により発振停止し
たことを検知する（この検知回路の一例としては
特開昭53−68288号公報の方法があり、その詳細
な回路は本願考案と直接開係がないので省略す
る）。 Next, FIG. 2 shows an electric circuit as a defrosting control device. L 1 and L 2 are AC power supplies, 8 is a DC power supply for the control circuit, and 9 is an oscillation circuit, which causes the frost detector 1 to oscillate at a constant oscillation level. Reference numeral 10 denotes a detection circuit that detects that the frost detector 1 has stopped oscillating due to frost formation (an example of this detection circuit is the method disclosed in Japanese Patent Application Laid-Open No. 53-68288, and the detailed circuit is disclosed in the present invention). (I will omit this as there is no direct person in charge).
また、熱交換器１に取り付けられた除霜終了検
知器１１（以下バイメタルという）からの信号で
リレーR1１２を駆動し、霜取り終了信号を遅延
回路１３に送つてリレーR2１４を駆動するもの
である。 Also, a signal from a defrosting end detector 11 (hereinafter referred to as bimetal) attached to the heat exchanger 1 drives relay R 1 12, and sends a defrosting end signal to delay circuit 13 to drive relay R 2 14. It is something.
１５はリレーR1１２の常閉接点、１６はリレ
ーR2１４の常開接点で、交流電源L1，L2間に直
列接続されて検知器除霜用ヒーター４を駆動す
る。又１７はリレーR1１２の常開接点で、熱交
換器１に取付けられた熱交換器除霜用ヒーター１
８を通電する。１９は冷蔵庫の庫内温度を検知し
て開閉する庫内温度制御装置の接点、２０はリレ
ーR2１４の常閉接点で、交流電源L1，L2間に直
列接続され冷凍機２１の運転を制御する。 15 is a normally closed contact of relay R 1 12, and 16 is a normally open contact of relay R 2 14, which are connected in series between AC power supplies L 1 and L 2 to drive the heater 4 for defrosting the detector. In addition, 17 is a normally open contact of relay R 1 12, which is a normally open contact of the heat exchanger defrosting heater 1 attached to the heat exchanger 1.
8 is energized. Reference numeral 19 indicates a contact of a temperature control device that detects the internal temperature of the refrigerator and opens and closes the refrigerator, and 20 indicates a normally closed contact of relay R 2 14, which is connected in series between AC power supplies L 1 and L 2 and controls the operation of the refrigerator 21. control.
このような構成において動作を説明する。冷凍
機２１の運転により、熱交換器７に着霜が始まる
が、同時に霜検知器１の振動面２にも着霜が始ま
る。やがて振動面２の着霜量がある一定値に達す
るといままで圧電素子３により行なわれていた発
振が停止し、これを検知回路１０にて検知してリ
レーR1１２、リレーR2１４を動作させる。この
リレーR1１２，R2１４の動作により接点１７が
閉じて熱交換器７に取り付けられた熱交換器除霜
用ヒーター１８に通電が始まると共に、接点２０
が開いて冷凍機２１は停止する。なおこの時、接
点１５は開状態、接点１６は閉状態となつて、検
知器除霜用ヒーター４には通電されないが、熱交
換器除霜用ヒーター１８に通電されることにより
熱交換器７からの熱が、取付板６を通じて、霜検
知器１に伝導し、表面や、振動面２に付着してい
た霜は溶け始める。やがて熱交換器７全体の霜が
溶けバイメタル１１によつて霜取り終了信号が検
知回路１０に加えられるとリレーR1１２は消勢
されるが、同時に遅延回路１３が働いてリレー
R2１４は動作状態を続ける。このためリレーR1
１２により接点１７は開いて熱交換器除霜用ヒー
ター１８は停止されるが接点１５が閉じて検知器
除霜用ヒーター４への通電が始まり、霜検知器１
表面に付着していた霜（この時点では水滴となつ
ているが）は、短時間で蒸発してしまう。やがて
遅延回路１３によりリレーR2１４は消勢される
ので、その接点１６が開いて検知器除霜用ヒータ
ー４への通電が停止するとともに、接点２０が閉
じて再び冷凍機が運転される。 The operation in such a configuration will be explained. As the refrigerator 21 operates, frost begins to form on the heat exchanger 7, and at the same time, frost begins to form on the vibrating surface 2 of the frost detector 1. Eventually, when the amount of frost on the vibrating surface 2 reaches a certain value, the oscillation that has been performed by the piezoelectric element 3 will stop, and this will be detected by the detection circuit 10 and the relays R 1 12 and R 2 14 will be activated. make it work. Due to the operation of the relays R 1 12 and R 2 14, the contact 17 closes and the heat exchanger defrosting heater 18 attached to the heat exchanger 7 starts to be energized, and the contact 20
opens and the refrigerator 21 stops. At this time, the contact 15 is open and the contact 16 is closed, so that the detector defrosting heater 4 is not energized, but the heat exchanger defrosting heater 18 is energized, so that the heat exchanger 7 The heat is conducted to the frost detector 1 through the mounting plate 6, and the frost adhering to the surface and the vibrating surface 2 begins to melt. When the frost on the entire heat exchanger 7 eventually melts and a defrosting end signal is applied to the detection circuit 10 by the bimetal 11, the relay R 1 12 is deenergized, but at the same time the delay circuit 13 is activated and the relay is activated.
R 2 14 continues to operate. For this reason relay R 1
12, the contact 17 opens and the heat exchanger defrosting heater 18 is stopped, but the contact 15 closes and electricity starts flowing to the detector defrosting heater 4, and the frost detector 1
The frost that had adhered to the surface (at this point it had turned into water droplets) would evaporate in a short period of time. Eventually, the relay R 2 14 is deenergized by the delay circuit 13, so its contact 16 opens to stop energizing the detector defrosting heater 4, and the contact 20 closes to restart the refrigerator.
なお、実施例では、除霜開始当初は熱交換器７
からの熱を取付具６を介して霜検知器１に導く構
成としたが、熱交換器除霜用ヒーター１８からの
幅射熱により必ずしも取付具６を熱伝導性の良い
もので構成しなくとも霜検知器１の除霜をなすこ
とができる。 In addition, in the embodiment, at the beginning of defrosting, the heat exchanger 7
Although the configuration is such that the heat from the heat exchanger is guided to the frost detector 1 through the fixture 6, the fixture 6 does not necessarily have to be made of a material with good thermal conductivity due to the radiation heat from the heat exchanger defrosting heater 18. The frost detector 1 can also be defrosted.
このように本考案による除霜制御装置は、熱交
換器除霜用ヒーターにまず通電して、熱交換器全
体の除霜を行なうとともにあわせて霜検知器の除
霜も熱交換器からの熱により行ない、熱交換器除
霜用ヒーターの通電を止めたあと、検知器除霜用
ヒーターに通電するので、除霜後霜検知器表面に
残る水滴を完全に蒸発させて、冷却運転再開後の
誤動作を防止できるとともに、検知器除霜用ヒー
ターの発熱を短時間、かつ有効に利用できるので
省エネルギー効果が得られるという優れた特長を
持つものである。 In this way, the defrosting control device according to the present invention first energizes the heat exchanger defrosting heater to defrost the entire heat exchanger, and also defrosts the frost detector using heat from the heat exchanger. After the heat exchanger defrosting heater is turned off, the detector defrosting heater is energized, which completely evaporates the water droplets remaining on the surface of the frost detector after defrosting, allowing it to cool down after the cooling operation resumes. This has the excellent feature of not only preventing malfunctions but also being able to effectively utilize the heat generated by the detector defrosting heater for a short period of time, resulting in energy savings.
第１図は本考案一実施例の除霜制御装置を構成
する霜検知器及び熱交換器の要部断面図、第２図
は同除霜制御装置の電気回路図を示す。
１……霜検知器、２……振動面、３……圧電素
子、４……検知器除霜用ヒーター、７……熱交換
器、９……発振回路、１０……検知回路、１１…
…除霜終了検知器、１２……第１のリレー、１３
……遅延回路、１４……第２のリレー、１８……
熱交換器除霜用ヒーター、２１……冷凍機。
FIG. 1 is a sectional view of essential parts of a frost detector and a heat exchanger that constitute a defrosting control device according to an embodiment of the present invention, and FIG. 2 is an electrical circuit diagram of the same defrosting control device. DESCRIPTION OF SYMBOLS 1... Frost detector, 2... Vibration surface, 3... Piezoelectric element, 4... Detector defrosting heater, 7... Heat exchanger, 9... Oscillation circuit, 10... Detection circuit, 11...
...defrosting end detector, 12...first relay, 13
...Delay circuit, 14...Second relay, 18...
Heat exchanger defrosting heater, 21...refrigeration machine.
Claims (1)
に接続された振動面を有した霜検知器と、前記振
動面に付着した霜を除去するための検知器除霜用
ヒーターと、前記振動面の発振の振幅変化により
着霜を検知する検知回路と、この検知回路の出力
により前記熱交換器除霜用ヒーターに通電し除霜
を開始させる第１のリレーと、熱交換器の除霜が
終了したことを検知して前記第１のリレーを動作
させて熱交換器除霜用ヒーターへの通電を停止さ
せる除霜終了検知器と、前記除霜終了検知器によ
る除霜終了検知後に一定時間動作する遅延回路
と、この遅延回路の動作中前記検知器除霜用ヒー
ターに通電する第２のリレーとよりなる除霜制御
装置。 a heat exchanger equipped with a defrosting heater; a frost detector having a vibrating surface connected to an oscillating circuit; a detector defrosting heater for removing frost attached to the vibrating surface; a detection circuit that detects frost formation based on a change in the amplitude of oscillation on the surface; a first relay that energizes the heat exchanger defrosting heater to start defrosting based on the output of the detection circuit; a defrosting end detector that detects the end of defrosting and operates the first relay to stop power supply to the heat exchanger defrosting heater; A defrosting control device comprising a time delay circuit and a second relay that energizes the detector defrosting heater during operation of the delay circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1396682U JPS58116983U (en) | 1982-02-02 | 1982-02-02 | Defrost control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1396682U JPS58116983U (en) | 1982-02-02 | 1982-02-02 | Defrost control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58116983U JPS58116983U (en) | 1983-08-10 |
| JPH0221746Y2 true JPH0221746Y2 (en) | 1990-06-12 |
Family
ID=30026451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1396682U Granted JPS58116983U (en) | 1982-02-02 | 1982-02-02 | Defrost control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58116983U (en) |
-
1982
- 1982-02-02 JP JP1396682U patent/JPS58116983U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58116983U (en) | 1983-08-10 |
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