JPH0728548Y2 - Defroster for refrigeration equipment - Google Patents
Defroster for refrigeration equipmentInfo
- Publication number
- JPH0728548Y2 JPH0728548Y2 JP6067490U JP6067490U JPH0728548Y2 JP H0728548 Y2 JPH0728548 Y2 JP H0728548Y2 JP 6067490 U JP6067490 U JP 6067490U JP 6067490 U JP6067490 U JP 6067490U JP H0728548 Y2 JPH0728548 Y2 JP H0728548Y2
- Authority
- JP
- Japan
- Prior art keywords
- defrosting
- temperature
- temperature detector
- detector
- air temperature
- 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 - Fee Related
Links
- 238000005057 refrigeration Methods 0.000 title claims description 13
- 238000010257 thawing Methods 0.000 claims description 57
- 239000003507 refrigerant Substances 0.000 claims description 18
- 230000002265 prevention Effects 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000013021 overheating Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Defrosting Systems (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、除霜機能を有する、コンテナ用の冷凍装置の
除霜を制御する除霜装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a defrosting device that has a defrosting function and controls defrosting of a refrigerating device for a container.
第３図に従来の冷凍装置の冷媒回路図を示す。図におい
て、１は圧縮機、２はコンデンサ、３は絞り、４はエバ
ポレータ、５はホットガスモジュレーティングバルブ、
６はコンデンサファン、７はエバポレータファン、８は
電気ヒータ、９はリターン空気温度検出器、10は過熱防
止温度検出器、11はエバポレータ出口冷媒温度検出器、
20はコントローラ、21はサプライ空気温度検出器、22は
エバポレータ微差圧検出器である。FIG. 3 shows a refrigerant circuit diagram of a conventional refrigeration system. In the figure, 1 is a compressor, 2 is a condenser, 3 is a throttle, 4 is an evaporator, 5 is a hot gas modulating valve,
6 is a condenser fan, 7 is an evaporator fan, 8 is an electric heater, 9 is a return air temperature detector, 10 is an overheat prevention temperature detector, 11 is an evaporator outlet refrigerant temperature detector,
Reference numeral 20 is a controller, 21 is a supply air temperature detector, and 22 is an evaporator fine differential pressure detector.
第４図に上記冷凍装置を設置したコンテナの断面図を示
す。12はコンテナであり、破線で示す矢印は空気の流れ
を示す。図にはエバポレータ４、エバポレータファン
７、電気ヒータ８、リターン空気温度検出器９、過熱防
止温度検出器10、サプライ空気温度検出器21、エバポレ
ータ微差圧検出器22の位置を示している。FIG. 4 shows a sectional view of a container in which the refrigeration system is installed. Reference numeral 12 is a container, and the arrow shown by a broken line shows the flow of air. The figure shows the positions of the evaporator 4, the evaporator fan 7, the electric heater 8, the return air temperature detector 9, the overheat prevention temperature detector 10, the supply air temperature detector 21, and the evaporator slight differential pressure detector 22.
上記従来の冷凍装置において圧縮機１で圧縮された高温
高圧のガス状の冷媒はコンデンサ２に入る。ここでこの
冷媒はコンデンサファン６によって送られる空気により
冷却され、高圧の液冷媒となり、絞り３で減圧されエバ
ポレータ４に入り、エバポレータファン７によって送ら
れる空気によって加熱されて蒸発し、圧縮機１へ戻る。
この時空気は、エバポレータ４で冷却され、コンテナ12
内へ吹出されてコンテナ12内部を冷却する。The high-temperature, high-pressure gaseous refrigerant compressed by the compressor 1 in the conventional refrigeration system described above enters the condenser 2. Here, this refrigerant is cooled by the air sent by the condenser fan 6, becomes a high-pressure liquid refrigerant, is decompressed by the throttle 3, enters the evaporator 4, is heated by the air sent by the evaporator fan 7, is evaporated, and is transferred to the compressor 1. Return.
At this time, the air is cooled by the evaporator 4, and the container 12
It is blown out inside to cool the inside of the container 12.
コントローラ20はリターン空気温度検出器９、又はサプ
ライ空気温度検出器21の検知する温度と、予め定められ
ているコンテナ12内温度の設定値とを比較し、絞り３お
よびホットガスモジュレーティングバルブ５の開度の調
整を行ない、能力を調整し、コンテナ12内の温度を一定
に保つ制御を行なう。コンテナ12内の温度が下ってくる
と、エバポレータ４の表面に着霜し始め、能力も低下し
てくる。この能力低下を回復する為に、圧縮機１、エバ
ポレータファン７、コンデンサファン６を停止し、電気
ヒータ８に通電してエバポレータ４の除霜を行なう。除
霜に入るタイミングは冷凍装置の運転を始めてから、あ
るいは前回の除霜を終了してからT1分後以降で、かつ、
エバポレータ出口冷媒温度検出器11の検出する温度TE
が、設定値STE1より低くなっている場合、又は過熱防止
温度検出器10の検出する温度THKが設定値STHK1より低い
場合、又はエバポレータ微差圧検知器22の検出する圧力
差Ｐが設定値SPより大きくなった場合である。また除霜
終了のタイミングは、エバポレータ出口冷媒温度検出器
11の検知する温度TEが、設定値STE2より高くなっている
か、加熱防止温度検出器10の検出する温度THKが設定値S
THK2より高くなっているか、あるいは除霜開始後T2分経
過した場合である。The controller 20 compares the temperature detected by the return air temperature detector 9 or the supply air temperature detector 21 with a preset set value of the temperature inside the container 12, and determines the throttle 3 and the hot gas modulating valve 5 The opening is adjusted, the capacity is adjusted, and the temperature inside the container 12 is kept constant. When the temperature inside the container 12 decreases, the surface of the evaporator 4 begins to frost, and the capacity also decreases. In order to recover this deterioration in performance, the compressor 1, the evaporator fan 7, and the condenser fan 6 are stopped, and the electric heater 8 is energized to defrost the evaporator 4. The timing to start defrosting is after starting the operation of the refrigeration system or after 1 minute from the end of the previous defrosting period, and
Temperature TE detected by evaporator outlet refrigerant temperature detector 11
Is lower than the set value STE 1 , or the temperature THK detected by the overheat prevention temperature detector 10 is lower than the set value STHK 1 , or the pressure difference P detected by the evaporator slight differential pressure detector 22 is set. This is the case when it becomes larger than the value SP. Also, the timing of the defrosting completion depends on the evaporator outlet refrigerant temperature detector.
The temperature TE detected by 11 is higher than the set value STE 2, or the temperature THK detected by the heating prevention temperature detector 10 is set by the set value STE 2.
It is higher than THK 2 or T 2 minutes have passed since the start of defrosting.
上記従来の冷媒装置の除霜装置には解決すべき次の課題
があった。The above conventional defrosting device for a refrigerant device has the following problems to be solved.
即ち、前記のごとく除霜を実施してもコンテナ12内の温
度設定や、コンテナ12内への新鮮空気導入量、外気温度
条件（降雨等）の変化、又は積荷からの蒸発水分量が多
い時は着霜量が増大したり着霜状態が変化し、エバポレ
ータ４やその周辺に残霜や残氷が有り、これをくり返す
ことにより、エバポレータ４やその周辺に霜氷が残り、
冷却能力が低下して冷凍装置の損傷につながりコンテナ
12内の積荷にダメージを与える不具合が有った。That is, even if the defrosting is carried out as described above, when the temperature inside the container 12 is set, the amount of fresh air introduced into the container 12, the outside air temperature condition (rainfall, etc.) changes, or the amount of water vaporized from the cargo is large. The amount of frost increases or the frosting state changes, and there are residual frost and residual ice on the evaporator 4 and its surroundings. By repeating this, frost and ice remain on the evaporator 4 and its surroundings.
Cooling capacity will drop and damage the refrigeration system
There was a problem that damaged the cargo within 12.
除霜終了の設定温度を上げれば解決することであるが、
通常の運転時はコンテナ12内の温度が上昇しすぎてしま
い、積荷を痛めることが有る。The solution is to raise the set temperature at the end of defrosting,
During normal operation, the temperature inside the container 12 may rise excessively, which may damage the cargo.
本考案は前記のような異常着霜による不完全除霜時のバ
ックアップ除霜を正常に実施し、積荷を痛めることを防
止する冷凍装置を提供することを目的とするものであ
る。It is an object of the present invention to provide a refrigerating apparatus that normally performs backup defrosting at the time of incomplete defrosting due to abnormal frost formation and prevents damage to a cargo.
本考案は上記課題の解決手段として、加熱運転時および
除霜運転時に通電される電気ヒータを備えると共に、同
電気ヒータへの通電を制御する除霜用タイマおよびエバ
ポレータ出口冷媒温度検出器を有する除霜制御手段と、
上記電気ヒータによる異常過熱を防止する過熱防止温度
検出器を備え、さらにリターン空気温度検出器とサプラ
イ空気温度検出器と残霜・氷検出器とを備えた冷凍装置
において、前記過熱防止温度検出器、リターン空気温度
検出器、サプライ空気温度検出器、残霜・氷検出器を除
霜制御手段に接続し、前記エバポレータ出口冷媒温度検
出器又は過熱防止温度検出器のいずれかの検出温度を除
霜開始および除霜終了の信号とする通常の除霜系の他に
この通常の除霜系の除霜終了時に前記残霜・氷検出器が
残霜・氷を検出したとき、前記除霜終了温度を補正して
バックアップ除霜するバックアップ除霜系を具備してな
ることを特徴とする冷凍装置の除霜装置を提供しようと
するものである。As a means for solving the above problems, the present invention includes an electric heater that is energized during a heating operation and a defrosting operation, and includes a defrosting timer that controls energization of the electric heater and an evaporator outlet refrigerant temperature detector. Frost control means,
A refrigeration apparatus including an overheat prevention temperature detector for preventing abnormal overheating by the electric heater, further comprising a return air temperature detector, a supply air temperature detector, and a residual frost / ice detector, wherein the overheat prevention temperature detector is provided. , The return air temperature detector, the supply air temperature detector, and the residual frost / ice detector are connected to the defrost control means, and the detected temperature of either the evaporator outlet refrigerant temperature detector or the overheat prevention temperature detector is defrosted. In addition to the normal defrosting system used as the start and defrosting end signal, when the residual frost / ice detector detects residual frost / ice at the end of defrosting of this normal defrosting system, the defrosting end temperature It is intended to provide a defrosting device for a refrigerating apparatus, which is equipped with a backup defrosting system for correcting and defrosting for backup.
本考案は上記のように構成されるので次の作用を有す
る。Since the present invention is constructed as described above, it has the following effects.
本考案は通常除霜時、エバポレータ出口冷媒温度検出器
の検出温度、又は過熱防止温度検出器の検出するそれぞ
れの温度が設定温度以上になるか、除霜開始後所定時間
経過したかにより除霜終了とする。除霜終了時、エバポ
レータ微差圧検知器等の残霜・氷検出器で再チェック
し、残霜・氷が有ると判断した時、バックアップ除霜の
ため、除霜終了設定温度を変更し、バックアップ除霜を
行なう。この結果、完全に除霜・氷される。In the present invention, during normal defrosting, the defrosting is performed depending on whether the temperature detected by the evaporator outlet refrigerant temperature detector or the temperature detected by the overheat prevention temperature detector is equal to or higher than the set temperature, or whether a predetermined time has elapsed after the start of defrosting. It ends. At the end of defrosting, recheck with residual frost / ice detector such as evaporator differential pressure detector, and when it is judged that there is residual frost / ice, change the defrosting end set temperature for backup defrosting, Backup defrost. As a result, the defrost and ice are completely removed.
本考案の一実施例を第１図及び第２図により説明する。
第１図は本実施例に係る冷凍装置の機能ブロック図で、
図に２点鎖線で囲んだコントローラ20aは従来例第３図
のコントローラ20に対応する。その他従来例と同様の構
成品については同符号を付し、説明を省略する。第２図
は第１図に示す機能ブロック図の制御フローチャートで
ある。An embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a functional block diagram of the refrigerating apparatus according to this embodiment,
A controller 20a surrounded by a chain double-dashed line in the figure corresponds to the controller 20 shown in FIG. Other components similar to those of the conventional example are designated by the same reference numerals, and description thereof will be omitted. FIG. 2 is a control flowchart of the functional block diagram shown in FIG.
第１図において、101は温度制御手段、102は除霜制御手
段、103は制御温度設定手段、104はタイマＡ、105はタ
イマＢ、106は圧縮機の駆動手段、107はヒータ通電用の
駆動手段、108はエバポレータファンの駆動手段であ
る。109は絞り弁の駆動手段、110はホットガスモジュレ
ーティングバルブの駆動手段、111はコンデンサファン
の駆動手段、112は設定温度によりリターン空気温度検
出器９又はサプライ空気温度検出器21のいずれかを選択
する選択手段、113は設定温度とリターン空気温度又は
サプライ空気温度とを比較する比較手段、114は除霜開
始及び除霜終了温度の温度設定手段、115はエバポレー
タ出口冷媒温度と設定手段114に設定された温度とを比
較する比較手段、116は除霜開始及び終了温度の温度設
定手段、117は過熱防止温度と設定手段116に設定された
温度とを比較する比較手段、118はバックアップ除霜の
ため温度設定手段114の設定温度を変更する補正手段、1
19はバックアップ除霜のため温度設定手段116の設定温
度を変更する補正手段である。In FIG. 1, 101 is temperature control means, 102 is defrost control means, 103 is control temperature setting means, 104 is timer A, 105 is timer B, 106 is compressor driving means, and 107 is heater energizing drive. Means, 108 is a driving means of the evaporator fan. 109 is a drive means for the throttle valve, 110 is a drive means for the hot gas modulating valve, 111 is a drive means for the condenser fan, and 112 is either the return air temperature detector 9 or the supply air temperature detector 21 depending on the set temperature. Selection means, 113 is a comparison means for comparing the set temperature with the return air temperature or the supply air temperature, 114 is a temperature setting means for the defrost start and defrost end temperature, and 115 is the evaporator outlet refrigerant temperature and the setting means 114 is set. Comparing means for comparing the defrosting start temperature and ending temperature with 116, 117 is a comparing means for comparing the overheat prevention temperature with the temperature set in the setting means 116, 118 is a backup defrosting temperature Therefore, the correction means for changing the set temperature of the temperature setting means 114, 1
Reference numeral 19 is a correction means for changing the set temperature of the temperature setting means 116 for backup defrosting.
次に上記構成の作用について第２図を援用して説明す
る。Next, the operation of the above configuration will be described with reference to FIG.
上記構成において、温度制御手段101は、制御温度設定
手段103によって設定された設定温度と、設定温度に応
じて後述の選択手段112により選択されたリターン空気
温度検出器９で検知したコンテナ（第４図のコンテナ12
に相当）内空気温度、又はサプライ空気温度検出器21で
検知したコンテナ内空気温度のいずれかと比較手段113
で比較された結果に基づいてコンテナ内の温度を前記設
定温度に維持するよう、駆動手段106,108,109,110,111
によって圧縮機１、絞り弁３、ホットガスのモジュレー
ティングバルブ５、コンデンサファン６、エバポレータ
ファン７を制御する。加熱運転時には、温度制御手段10
1は除霜制御手段102に信号を送り、ヒータの駆動手段10
7に指令し、ヒータ８をオンして加熱を行なう。リター
ン空気温度検出器９で検知したコンテナ内空気温度、又
はサプライ空気温度検出器21の検知したコンテナ内空気
温度のいずれかと、設定温度とを比較し、コンテナ内空
気温度が設定温度より高くなったら、除霜制御手段102
に信号を送り、ヒータ駆動手段107に指令し、ヒータ８
をオフする。又、除霜時には、除霜制御手段102は、タ
イマA104が設定時間T1を経過したことを示し、かつ、エ
バポレータ出口冷媒温度検出器11の検出する温度TEまた
は過熱防止温度検出器10の検出する温度THKのいずれか
が、各々温度設定手段114,116に設定された除霜開始設
定温度STE1、またはSTHK1以下になったらヒータの駆動
手段107にてヒータ８に通電して除霜を開始する。タイ
マB105は上記温度がSTE1、又はSTHK1以下になったらカ
ウンタを開始する。除霜終了は除霜制御手段102がエバ
ポレータ出口冷媒温度検出器11の検出する温度TE、又は
過熱防止温度検出器10の検出する温度THKのいずれか
が、各々温度設定手段114,116に設定された通常の除霜
終了設定温度STE2、またはSTHK2に到達するか、あるい
は除霜開始からカウントを開始したタイマB105が設定時
間T2を経過したことを示すかのいずれかを満足したら、
除霜制御手段102はヒータの駆動手段107に指令し、ヒー
タ８への通電をやめる。In the above-mentioned structure, the temperature control means 101 has the set temperature set by the control temperature setting means 103 and the container detected by the return air temperature detector 9 selected by the selecting means 112 described later according to the set temperature (fourth temperature). Illustrated container 12
Corresponding to the internal air temperature or the container internal air temperature detected by the supply air temperature detector 21 and comparing means 113
In order to maintain the temperature in the container at the set temperature on the basis of the result of comparison by the driving means 106, 108, 109, 110, 111
The compressor 1, the throttle valve 3, the hot gas modulating valve 5, the condenser fan 6, and the evaporator fan 7 are controlled by. During heating operation, temperature control means 10
1 sends a signal to the defrost control means 102 to drive the heater 10
7 is commanded to turn on the heater 8 for heating. Either the air temperature inside the container detected by the return air temperature detector 9 or the air temperature inside the container detected by the supply air temperature detector 21 is compared with the set temperature, and if the air temperature inside the container becomes higher than the set temperature. , Defrost control means 102
To the heater driving means 107 to send a signal to the heater 8
Turn off. Further, at the time of defrosting, the defrosting control means 102 indicates that the timer A 104 has passed the set time T 1 , and detects the temperature TE detected by the evaporator outlet refrigerant temperature detector 11 or the overheat prevention temperature detector 10. When either of the temperatures THK to be set becomes equal to or lower than the defrosting start set temperature STE 1 set in the temperature setting means 114, 116 or STHK 1 , the heater driving means 107 energizes the heater 8 to start defrosting. . The timer B105 starts the counter when the temperature becomes STE 1 or STHK 1 or less. When the defrosting ends, either the temperature TE detected by the evaporator outlet refrigerant temperature detector 11 by the defrosting control means 102 or the temperature THK detected by the overheat prevention temperature detector 10 is normally set in the temperature setting means 114, 116, respectively. If either the defrosting end set temperature STE 2 of ST, or STHK 2 is reached, or the timer B105 that started counting from the start of defrosting indicates that the set time T 2 has elapsed,
The defrost control means 102 gives an instruction to the heater driving means 107 to stop energizing the heater 8.
こうして除霜が終了したら、除霜制御手段102はエバポ
レータファン駆動手段11に信号を送りエバポレータファ
ン７を回し、エバポレータ微差圧検知器22の着霜検知器
で着霜状態を再チェックし着霜を検知したら除霜制御手
段102はエバポレータファン７を停止し、補正手段118,1
19に指令を出し、温度設定手段114,116の通常の除霜終
了設定温度STE2，STHK2を各々高めの除霜終了設定温度S
TE3，STHK3に変更し、ヒータの駆動手段107にてヒータ
８に通電しバックアップ除霜を実施する。When the defrosting is completed in this way, the defrosting control means 102 sends a signal to the evaporator fan driving means 11 to rotate the evaporator fan 7, and the frosting detector of the evaporator slight differential pressure detector 22 rechecks the frosting state to form the frosting state. If the defrost control means 102 stops the evaporator fan 7 and detects the correction means 118, 1
A command is issued to 19, and the normal defrosting end set temperatures STE 2 and STHK 2 of the temperature setting means 114 and 116 are respectively set to a higher defrosting end set temperature S.
TE 3 and STHK 3 are changed, and the heater driving means 107 energizes the heater 8 to perform backup defrosting.
除霜終了は前記と同様でTEまたはTHKのいずれか各々がS
TE3，STHK3に到達したら除霜制御手段102はヒータの駆
動手段107に指令し、ヒータ８への通電をやめる。Defrosting is completed in the same way as above, either TE or THK is S
When TE 3 and STHK 3 are reached, the defrost control means 102 commands the heater driving means 107 to stop energizing the heater 8.
実施例の説明では着霜検知器をエバポレータ微差圧検知
器22としたが残霜、残氷状態が検知できるものであれば
よい。In the description of the embodiment, the frost formation detector is the evaporator slight differential pressure detector 22, but it may be any one that can detect the residual frost and the residual ice state.
リターン空気温度検出器９、サプライ空気温度検出器21
の各々の検出値の差、又は風量検出器等で実施すること
も出来る。Return air temperature detector 9, supply air temperature detector 21
It is also possible to implement the difference between the respective detection values, or an air flow detector or the like.
本考案は上記のように構成されるので次の効果を有す
る。Since the present invention is configured as described above, it has the following effects.
即ち、本考案の冷凍装置の除霜装置では、通常の着霜状
態時の除霜終了手段の他に異常着霜状態時の除霜終了手
段を設けたため、除霜時のコンテナ内温度上昇がきわめ
て小さい範囲に留まり、着霜による冷却能力の低下、冷
凍装置の損傷、昇温による積荷の劣化等のない冷凍装置
の制御装置が得られる。That is, in the defrosting device of the refrigeration system of the present invention, since the defrosting ending means in the abnormal frosting state is provided in addition to the defrosting ending means in the normal frosting state, the temperature rise in the container during defrosting It is possible to obtain a control device for a refrigeration system that stays in an extremely small range and is free from deterioration of cooling capacity due to frost formation, damage to the refrigeration system, deterioration of cargo due to temperature rise, and the like.
第１図は本考案の一実施例に係る冷凍装置の制御装置の
機能ブロック図、第２図は上記実施例の制御フローチャ
ート図、第３図は従来の冷凍装置の冷媒回路図、第４図
は従来の冷凍装置を設置したコンテナの断面図である。 １……圧縮機、２……コンデンサ、３……絞り弁、４…
…エバポレータ、５……ホットガスモジュレーティング
バルブ、６……コンデンサファン、７……エバポレータ
ファン、８……ヒータ、９……リターン空気温度検出
器、10……過熱防止温度検出器、11……エバポレータ出
口冷媒温度検出器、20a……コントローラ、21……サプ
ライ空気温度検出器、22……エバポレータ微差圧検知
器、101……温度制御手段、102……除霜制御手段、103
……制御温度設定手段、104……タイマＡ、105……タイ
マＢ、106,107,108,109,111……駆動手段、112……選択
手段、113……比較手段、114……温度設定手段、115…
…比較手段、116……温度設定手段、117……比較手段、
118,119……補正手段。FIG. 1 is a functional block diagram of a control device for a refrigerating machine according to an embodiment of the present invention, FIG. 2 is a control flow chart of the above embodiment, FIG. 3 is a refrigerant circuit diagram of a conventional refrigerating machine, and FIG. [Fig. 4] is a cross-sectional view of a container in which a conventional refrigeration system is installed. 1 ... compressor, 2 ... condenser, 3 ... throttle valve, 4 ...
… Evaporator, 5 …… Hot gas modulating valve, 6 …… Condenser fan, 7 …… Evaporator fan, 8 …… Heater, 9 …… Return air temperature detector, 10 …… Overheat prevention temperature detector, 11 …… Evaporator outlet refrigerant temperature detector, 20a ... Controller, 21 ... Supply air temperature detector, 22 ... Evaporator slight differential pressure detector, 101 ... Temperature control means, 102 ... Defrost control means, 103
...... Control temperature setting means, 104 ...... Timer A, 105 ...... Timer B, 106,107,108,109,111 ...... Drive means, 112 ...... Selection means, 113 ...... Comparison means, 114 ...... Temperature setting means, 115 ...
… Comparison means, 116 …… Temperature setting means, 117 …… Comparison means,
118,119 …… Correction means.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 ▲高▼橋 利昌 愛知県名古屋市中村区岩塚町字高道１番地 三菱重工業株式会社名古屋研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor ▲ Takahashi Toshimasa No.1 Takamichi, Iwazuka-cho, Nakamura-ku, Aichi Prefecture Nagoya, Japan Mitsubishi Heavy Industries Nagoya Research Institute
Claims (1)
電気ヒータを備えると共に、同電気ヒータへの通電を制
御する除霜用タイマおよびエバポレータ出口冷媒温度検
出器を有する除霜制御手段と、上記電気ヒータによる異
常過熱を防止する過熱防止温度検出器を備え、さらにリ
ターン空気温度検出器とサプライ空気温度検出器と残霜
・氷検出器とを備えた冷凍装置において、前記過熱防止
温度検出器、リターン空気温度検出器、サプライ空気温
度検出器、残霜・氷検出器を除霜制御手段に接続し、前
記エバポレータ出口冷媒温度検出器又は過熱防止温度検
出器のいずれかの検出温度を除霜開始および除霜終了の
信号とする通常の除霜系の他にこの通常の除霜系の除霜
終了時に前記残霜・氷検出器が残霜・氷を検出したと
き、前記除霜終了温度を補正してバックアップ除霜する
バックアップ除霜系を具備してなることを特徴とする冷
凍装置の除霜装置。1. Defrost control means comprising an electric heater that is energized during heating operation and defrosting operation, and having a defrosting timer that controls energization of the electric heater and an evaporator outlet refrigerant temperature detector. A refrigeration apparatus including an overheat prevention temperature detector for preventing abnormal overheating by the electric heater, further comprising a return air temperature detector, a supply air temperature detector, and a residual frost / ice detector, wherein the overheat prevention temperature detector is provided. , The return air temperature detector, the supply air temperature detector, and the residual frost / ice detector are connected to the defrost control means, and the detected temperature of either the evaporator outlet refrigerant temperature detector or the overheat prevention temperature detector is defrosted. In addition to the normal defrosting system used as a signal for starting and defrosting, when the residual frost / ice detector detects residual frost / ice at the end of defrosting of this normal defrosting system, the defrosting end temperature is set. Defroster of a refrigeration apparatus characterized by comprising comprises a backup defrost system to back up defrosting by correcting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6067490U JPH0728548Y2 (en) | 1990-06-11 | 1990-06-11 | Defroster for refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6067490U JPH0728548Y2 (en) | 1990-06-11 | 1990-06-11 | Defroster for refrigeration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0420985U JPH0420985U (en) | 1992-02-21 |
| JPH0728548Y2 true JPH0728548Y2 (en) | 1995-06-28 |
Family
ID=31588249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6067490U Expired - Fee Related JPH0728548Y2 (en) | 1990-06-11 | 1990-06-11 | Defroster for refrigeration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0728548Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017122569A (en) * | 2015-12-29 | 2017-07-13 | マースクライン エーエスＭａｅｒｓｋ Ｌｉｎｅ Ａ／Ｓ | Method of deciding when to terminate defrosting cycle in refrigerated container |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6149921B2 (en) * | 2014-12-05 | 2017-06-21 | ダイキン工業株式会社 | Refrigeration equipment |
-
1990
- 1990-06-11 JP JP6067490U patent/JPH0728548Y2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017122569A (en) * | 2015-12-29 | 2017-07-13 | マースクライン エーエスＭａｅｒｓｋ Ｌｉｎｅ Ａ／Ｓ | Method of deciding when to terminate defrosting cycle in refrigerated container |
| US9933199B2 (en) | 2015-12-29 | 2018-04-03 | Maersk Line A/S | Method of deciding when to terminate a defrosting cycle within a refrigerated container |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0420985U (en) | 1992-02-21 |
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| LAPS | Cancellation because of no payment of annual fees |